By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been realized.Based on the research of ...By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been realized.Based on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was presented.The results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes area.The combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner changes.The parametric model method is helpful to provide a fast design method for the aero-engine combustor design.展开更多
With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from th...With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from the original government encouragement to the present construction units independent requirements to adopt fabricated practices. Nowadays, many industrial factories and civil frame structures have adopted prefabricated technology. Compared with traditional frame structures, prefabricated buildings have higher requirements in design, production and construction and some problems have been exposed in the process of promotion and implementation which requires us to consider more comprehensively and work more carefully in the design of prefabricated frame structures.展开更多
On the basis of previous research achievements of measuring the solid state nuclear track in apatite by thermal analysis method, the author further proposes the research program to measure the energy deposited by the ...On the basis of previous research achievements of measuring the solid state nuclear track in apatite by thermal analysis method, the author further proposes the research program to measure the energy deposited by the solid state nuclear track contained in zircon, sphene, epidote, apatite and other samples, in order to study the geological age and geothermal history. Compared with the measurement of nuclear track density by etching method, this one does not need to conduct so many processing programs for samples, but can improve the measurement accuracy.展开更多
The new numerical approach for analysis of the warhead transportations is suggested.This approach allows to control the warhead operability before its experimental analysis.The approach is implemented by the adequate ...The new numerical approach for analysis of the warhead transportations is suggested.This approach allows to control the warhead operability before its experimental analysis.The approach is implemented by the adequate models for the software ANSYS.Analysis of the loads at land operations and transportations of the warhead by natural roads,water and aviation allows to obtain the maximal values of loads,which are used in numerical simulations of the warhead.These loads give an opportunity to analyze the operability and the fatigue strength of the cartridge warhead.The numerical simulations of the attachments of the warhead combat elements are performed on the basis of the suggested method.The data of the numerical simulations verifies the operability of the fastener system of the warhead combat elements.展开更多
A project of the expedition to the north pole of Mars, which is carried out in two stages, has been developed. In the first stage, a space refueller and a mobile solar battery are delivered to the icy surface of the n...A project of the expedition to the north pole of Mars, which is carried out in two stages, has been developed. In the first stage, a space refueller and a mobile solar battery are delivered to the icy surface of the north pole of Mars. The delivery is carried out with the help of electric rocket ER-7, driven by the electric rocket engine “MARS”, and the source of electricity is a solar battery from gallium arsenide. In the second stage, the space train is formed from two interconnected ER-7 rockets and an orbital takeoff-landing capsule TLC-2, in which three astronauts land on the surface and carry out a complex of physical, biological and geological researches on Mars surface. The space refueller has been developed, which melts the water ice on the surface of Mars and with the help of an electrolyser and a liquefier produces fuel and oxidizer for the operation of the chemical rocket engine of the takeoff-landing capsule. To move astronauts from the north pole to the equator, a spacecraft—?marsoplane, which consists of the electric rocket ER-7 and the takeoff-landing capsule TLC-1 is developed. The duration of the expedition is 110 days at a cost of 2 billion dollars.展开更多
A project of spacecraft “moonplane” for regular delivery of astronauts onto the Moon is considered. At the first stage of flight by using a carrier rocket, equipped with a chemical rocket engine, the astronauts are ...A project of spacecraft “moonplane” for regular delivery of astronauts onto the Moon is considered. At the first stage of flight by using a carrier rocket, equipped with a chemical rocket engine, the astronauts are delivered on the international space station ISS. For flights from Earth orbit into Moon orbit, the design of a moonplane “MOND”, consisting of an interorbital module and a lunar module, has been developed. The interorbital module is an electric rocket, equipped with four superconductive magnetoplasma engine MARS. To power supply of the electromotors, a solar battery of gallium arsenide is used. The design of the lunar module with cabin astronauts, which is equipped with a chemical rocket engine for landing and take-off from the surface of the Moon, is developed. A method and a device for refuelling of the electrical rocket engines with nitrogen and for refuelling of the chemical rocket engines with oxygen and hydrogen, which are stored in cryogenic tanks of the moonplane in the liquid state is developed. The developed spacecraft is capable to regularly transport four astronauts off a moorage of ISS onto the surface of the Moon and back during 6 days. The total cost delivery of one astronaut is 4 million US dollars.展开更多
A scramjet engine combustion efficiency measure system was designed.The combustion efficiency was measured by chromatography method,and the results of chromatography method were compared with those of temperature meth...A scramjet engine combustion efficiency measure system was designed.The combustion efficiency was measured by chromatography method,and the results of chromatography method were compared with those of temperature method.The results indicate that the combustion efficiency measured by chromatography method was 80.7%,lower than the combustion efficiency of 84.5%measured by temperature method;the combustion efficiency could be measured more precisely by chromatogram method than by temperature method.The combustion efficiency measure system based on chromatogram method can work well,and thus can be used to measure the combustion efficiency of scramjet engine.展开更多
A project of elimination of potentially dangerous asteroid Apophis which April 13, 2029 year approaches to Earth at a distance of 36,000 km is considered. The elimination is carried out by means of asteroid disintegra...A project of elimination of potentially dangerous asteroid Apophis which April 13, 2029 year approaches to Earth at a distance of 36,000 km is considered. The elimination is carried out by means of asteroid disintegration into small fragments as a result of nuclear explosion, which is produced 133 days before the moment of maximal convergence of the asteroid Apophis with Earth. In the project, a method of phased timely delivery of nuclear charge on the surface of the asteroid is proposed. In the first stage, the nuclear charge using carrier rocket “Delta” is delivered into Earth orbit. In the second stage, the charge using electric rocket is transferred from Earth orbit into the orbit of asteroid Apophis and is descended onto its surface. For implementation of the project, the design of electric rocket ER-7, which uses electric rocket engines type MARS and solar panels based on gallium arsenide is developed. Design of landing capsule, which has a chemical rocket engine and the container in which located the nuclear charge of 6 megaton is developed.展开更多
In the case of composite girders, an effective cooperation of both parts of the section is influenced by deformability of connectors. Limited flexural stiffness of welded studs, used commonly in bridge structures, doe...In the case of composite girders, an effective cooperation of both parts of the section is influenced by deformability of connectors. Limited flexural stiffness of welded studs, used commonly in bridge structures, does not provide full interaction of a steel beam and a concrete slab. This changes strain distribution in cross-sections of a composite girder and results in redistribution of internal forces in steel and concrete element. In the paper partial interaction index defined on the basis of a neutral axis position, which can be used for verification of steel-concrete interaction in real bridge structures rather than in specimens is proposed. The range of the index value changes, obtained during load testing of a typical steel-concrete composite beam bridge, is presented. The investigation was carried out on a motorway viaduct, consisting of two parallel structures. During the testing values of strains in girders under static and quasi-static loads were measured. The readings from the gauges were used to determine the index, characterizing composite action of the girders. Results of bridge testing under movable load, changing position along the bridge span is presented and obtained in-situ influence functions of strains and index values are commented in the paper.展开更多
A project of the space cruise over the route “Earth-Mars-Earth” is considered. Design of electric rocket train, whose energy source is a semiconductor solar panel and a superconducting electrorocket engine (MARS) of...A project of the space cruise over the route “Earth-Mars-Earth” is considered. Design of electric rocket train, whose energy source is a semiconductor solar panel and a superconducting electrorocket engine (MARS) of new design is used as a mover, is developed. The concept of the cruise, which allows to reduce time of interorbital flight in twice, owing to refueling with working body on orbit of Mars, is developed. Development of the space locomotive with 4 MARS engines rated at 600 kW in which nitrogen is used as working substance, was being carried out. A new design of takeoff-landing capsule, in which cabin can be placed 10 space tourists, is developed. The studies carried out on the mathematical model, which takes into account the changing of power provided by onboard power plant, depending on the distance from the Sun, has shown that cruise may be done within 77 days including the stay of tourists on the Martian surface during 7 days. The project provides for implementation three cruises on the surface of Mars and 15 cruises on the lunar surface during two years with total cost of 2.2 billion dollars.展开更多
A project of the space train MARSZUG intended for regular delivery of astronauts to Mars is considered. In the first stage of the flight, the astronauts with the help of the carrier rocket equipped with a chemical roc...A project of the space train MARSZUG intended for regular delivery of astronauts to Mars is considered. In the first stage of the flight, the astronauts with the help of the carrier rocket equipped with a chemical rocket engine are delivered to the international space station (ISS). To deliver astronauts from Earth’s orbit to Mars orbit, a space train design consisting of two rockets, which have superconductive magnetoplasma electric engine MARS, has been developed. For the first time, a combined propulsion system MARS-M has been developed for the train movement, allowing<span style="color:red;"> </span><span style="font-family:Verdana;">carrying out the pitching, yaw and rotation of the rocket. This greatly simplifies the rocket control system and increases its reliability. The energy source of the electric engines is a sliding solar panel made of gallium arsenide. Working substance to create reactive thrust of electrorocket engines—hydrogen is stored in a liquid state in the cryogenic tank located along the longitudinal axis of the rocket. In the nasal part of the front electric rocket, a shaft rotating in a superconductive bearing is located. The shaft has a cylindrical nozzle, on which with the help of docking units two takeoff-landing capsules TLC-1 and TLC-2 are installed with which help landing and takeoff from the surface of Mars is carried out. This allows astronauts to constantly stay during the flight under the influence of gravity. To refuel the space train with liquid hydrogen in the orbit of Mars, the design of a space refueler with a chemical rocket engine is developed. The developed space train is able to regularly deliver astronauts to the surface near the northern pole of Mars.</span>展开更多
文摘By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been realized.Based on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was presented.The results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes area.The combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner changes.The parametric model method is helpful to provide a fast design method for the aero-engine combustor design.
文摘With the rising labor cost, energy saving and environmental protection, formwork-free and bracing-free and other fabricated building technologies gradually mature, and the construction market has been promoted from the original government encouragement to the present construction units independent requirements to adopt fabricated practices. Nowadays, many industrial factories and civil frame structures have adopted prefabricated technology. Compared with traditional frame structures, prefabricated buildings have higher requirements in design, production and construction and some problems have been exposed in the process of promotion and implementation which requires us to consider more comprehensively and work more carefully in the design of prefabricated frame structures.
基金supported by the National Natural Science Foundation of China(No.11275237)Natural Science Foundation of Shaanxi Province,China(No.SJ08-A26)
文摘On the basis of previous research achievements of measuring the solid state nuclear track in apatite by thermal analysis method, the author further proposes the research program to measure the energy deposited by the solid state nuclear track contained in zircon, sphene, epidote, apatite and other samples, in order to study the geological age and geothermal history. Compared with the measurement of nuclear track density by etching method, this one does not need to conduct so many processing programs for samples, but can improve the measurement accuracy.
文摘The new numerical approach for analysis of the warhead transportations is suggested.This approach allows to control the warhead operability before its experimental analysis.The approach is implemented by the adequate models for the software ANSYS.Analysis of the loads at land operations and transportations of the warhead by natural roads,water and aviation allows to obtain the maximal values of loads,which are used in numerical simulations of the warhead.These loads give an opportunity to analyze the operability and the fatigue strength of the cartridge warhead.The numerical simulations of the attachments of the warhead combat elements are performed on the basis of the suggested method.The data of the numerical simulations verifies the operability of the fastener system of the warhead combat elements.
文摘A project of the expedition to the north pole of Mars, which is carried out in two stages, has been developed. In the first stage, a space refueller and a mobile solar battery are delivered to the icy surface of the north pole of Mars. The delivery is carried out with the help of electric rocket ER-7, driven by the electric rocket engine “MARS”, and the source of electricity is a solar battery from gallium arsenide. In the second stage, the space train is formed from two interconnected ER-7 rockets and an orbital takeoff-landing capsule TLC-2, in which three astronauts land on the surface and carry out a complex of physical, biological and geological researches on Mars surface. The space refueller has been developed, which melts the water ice on the surface of Mars and with the help of an electrolyser and a liquefier produces fuel and oxidizer for the operation of the chemical rocket engine of the takeoff-landing capsule. To move astronauts from the north pole to the equator, a spacecraft—?marsoplane, which consists of the electric rocket ER-7 and the takeoff-landing capsule TLC-1 is developed. The duration of the expedition is 110 days at a cost of 2 billion dollars.
文摘A project of spacecraft “moonplane” for regular delivery of astronauts onto the Moon is considered. At the first stage of flight by using a carrier rocket, equipped with a chemical rocket engine, the astronauts are delivered on the international space station ISS. For flights from Earth orbit into Moon orbit, the design of a moonplane “MOND”, consisting of an interorbital module and a lunar module, has been developed. The interorbital module is an electric rocket, equipped with four superconductive magnetoplasma engine MARS. To power supply of the electromotors, a solar battery of gallium arsenide is used. The design of the lunar module with cabin astronauts, which is equipped with a chemical rocket engine for landing and take-off from the surface of the Moon, is developed. A method and a device for refuelling of the electrical rocket engines with nitrogen and for refuelling of the chemical rocket engines with oxygen and hydrogen, which are stored in cryogenic tanks of the moonplane in the liquid state is developed. The developed spacecraft is capable to regularly transport four astronauts off a moorage of ISS onto the surface of the Moon and back during 6 days. The total cost delivery of one astronaut is 4 million US dollars.
文摘A scramjet engine combustion efficiency measure system was designed.The combustion efficiency was measured by chromatography method,and the results of chromatography method were compared with those of temperature method.The results indicate that the combustion efficiency measured by chromatography method was 80.7%,lower than the combustion efficiency of 84.5%measured by temperature method;the combustion efficiency could be measured more precisely by chromatogram method than by temperature method.The combustion efficiency measure system based on chromatogram method can work well,and thus can be used to measure the combustion efficiency of scramjet engine.
文摘A project of elimination of potentially dangerous asteroid Apophis which April 13, 2029 year approaches to Earth at a distance of 36,000 km is considered. The elimination is carried out by means of asteroid disintegration into small fragments as a result of nuclear explosion, which is produced 133 days before the moment of maximal convergence of the asteroid Apophis with Earth. In the project, a method of phased timely delivery of nuclear charge on the surface of the asteroid is proposed. In the first stage, the nuclear charge using carrier rocket “Delta” is delivered into Earth orbit. In the second stage, the charge using electric rocket is transferred from Earth orbit into the orbit of asteroid Apophis and is descended onto its surface. For implementation of the project, the design of electric rocket ER-7, which uses electric rocket engines type MARS and solar panels based on gallium arsenide is developed. Design of landing capsule, which has a chemical rocket engine and the container in which located the nuclear charge of 6 megaton is developed.
文摘In the case of composite girders, an effective cooperation of both parts of the section is influenced by deformability of connectors. Limited flexural stiffness of welded studs, used commonly in bridge structures, does not provide full interaction of a steel beam and a concrete slab. This changes strain distribution in cross-sections of a composite girder and results in redistribution of internal forces in steel and concrete element. In the paper partial interaction index defined on the basis of a neutral axis position, which can be used for verification of steel-concrete interaction in real bridge structures rather than in specimens is proposed. The range of the index value changes, obtained during load testing of a typical steel-concrete composite beam bridge, is presented. The investigation was carried out on a motorway viaduct, consisting of two parallel structures. During the testing values of strains in girders under static and quasi-static loads were measured. The readings from the gauges were used to determine the index, characterizing composite action of the girders. Results of bridge testing under movable load, changing position along the bridge span is presented and obtained in-situ influence functions of strains and index values are commented in the paper.
文摘A project of the space cruise over the route “Earth-Mars-Earth” is considered. Design of electric rocket train, whose energy source is a semiconductor solar panel and a superconducting electrorocket engine (MARS) of new design is used as a mover, is developed. The concept of the cruise, which allows to reduce time of interorbital flight in twice, owing to refueling with working body on orbit of Mars, is developed. Development of the space locomotive with 4 MARS engines rated at 600 kW in which nitrogen is used as working substance, was being carried out. A new design of takeoff-landing capsule, in which cabin can be placed 10 space tourists, is developed. The studies carried out on the mathematical model, which takes into account the changing of power provided by onboard power plant, depending on the distance from the Sun, has shown that cruise may be done within 77 days including the stay of tourists on the Martian surface during 7 days. The project provides for implementation three cruises on the surface of Mars and 15 cruises on the lunar surface during two years with total cost of 2.2 billion dollars.
文摘A project of the space train MARSZUG intended for regular delivery of astronauts to Mars is considered. In the first stage of the flight, the astronauts with the help of the carrier rocket equipped with a chemical rocket engine are delivered to the international space station (ISS). To deliver astronauts from Earth’s orbit to Mars orbit, a space train design consisting of two rockets, which have superconductive magnetoplasma electric engine MARS, has been developed. For the first time, a combined propulsion system MARS-M has been developed for the train movement, allowing<span style="color:red;"> </span><span style="font-family:Verdana;">carrying out the pitching, yaw and rotation of the rocket. This greatly simplifies the rocket control system and increases its reliability. The energy source of the electric engines is a sliding solar panel made of gallium arsenide. Working substance to create reactive thrust of electrorocket engines—hydrogen is stored in a liquid state in the cryogenic tank located along the longitudinal axis of the rocket. In the nasal part of the front electric rocket, a shaft rotating in a superconductive bearing is located. The shaft has a cylindrical nozzle, on which with the help of docking units two takeoff-landing capsules TLC-1 and TLC-2 are installed with which help landing and takeoff from the surface of Mars is carried out. This allows astronauts to constantly stay during the flight under the influence of gravity. To refuel the space train with liquid hydrogen in the orbit of Mars, the design of a space refueler with a chemical rocket engine is developed. The developed space train is able to regularly deliver astronauts to the surface near the northern pole of Mars.</span>
