The changes of three components of aerodynamic force were discussed with the attack angle conversion for three kinds of section models. Based on the project of Shanghai Yangtze River Bridge, the wind tunnel test was c...The changes of three components of aerodynamic force were discussed with the attack angle conversion for three kinds of section models. Based on the project of Shanghai Yangtze River Bridge, the wind tunnel test was conducted to obtain its three components of aerodynamic force including 75 conditions of the construction stage, the bridge without vehicles and the bridge with vehicles from - 12 degrees to ＋ 12 degrees. For the bridge with vehicles, the drag force coefficient and the absolute value of both lift coefficient and moment coefficient were decreased by the vehicles. The test resuh shows that the bridge railing and vehicles have much influence on the three components of aerodynamic force of the vehicle-bridge system for Shanghai Yangtze River Bridge.展开更多
Plasma-facing components in thermonuclear reactors primarily consist of plasma-facing materials and heat-sink materials.Tungsten-based materials are currently regarded as the most promising candidates as plasma-facing...Plasma-facing components in thermonuclear reactors primarily consist of plasma-facing materials and heat-sink materials.Tungsten-based materials are currently regarded as the most promising candidates as plasma-facing materials,while Cu alloys are typically utilized as heat-sink materials.However,bonding tungsten-based materials and Cu alloys together is challenging due to the inherent immiscibility of W and Cu.This review outlines advanced bonding technologies for tungstenbased materials and Cu alloys by tailoring joint interfaces.These technologies encompass:(i)direct diffusion bonding of W and Cu using high-temperature conditions(close to the melting point of Cu)structure,with an emphasis on elucidating the underlying thermodynamic mechanisms through the construction of thermodynamic models and molecular dynamics simulations;(ii)combined technologies involving surface treatments of tungsten-based materials,copper embedding,and diffusion bonding,along with an analysis of the mechanisms that enhance joint properties through tailored interface structures.The review also provides insights into future research directions for bonding between tungsten-based materials and Cu alloys.These advancements may offer significant support for plasma-facing components in future thermonuclear fusion reactors.展开更多
基金Sponsored by the Key Project of the National Natural Science Foundation of China (Grant No.90715039)
文摘The changes of three components of aerodynamic force were discussed with the attack angle conversion for three kinds of section models. Based on the project of Shanghai Yangtze River Bridge, the wind tunnel test was conducted to obtain its three components of aerodynamic force including 75 conditions of the construction stage, the bridge without vehicles and the bridge with vehicles from - 12 degrees to ＋ 12 degrees. For the bridge with vehicles, the drag force coefficient and the absolute value of both lift coefficient and moment coefficient were decreased by the vehicles. The test resuh shows that the bridge railing and vehicles have much influence on the three components of aerodynamic force of the vehicle-bridge system for Shanghai Yangtze River Bridge.
基金supported by the National Natural Science Foundation of China(No.51971153)the National Key Research and Development Program of China(No.2017YFE0302600)+1 种基金Scientific Research Initial Funding of Taiyuan University of Science and Technology(No.20232088)the Award Fund for Outstanding Doctors in Shanxi Province(No.20242005)。
文摘Plasma-facing components in thermonuclear reactors primarily consist of plasma-facing materials and heat-sink materials.Tungsten-based materials are currently regarded as the most promising candidates as plasma-facing materials,while Cu alloys are typically utilized as heat-sink materials.However,bonding tungsten-based materials and Cu alloys together is challenging due to the inherent immiscibility of W and Cu.This review outlines advanced bonding technologies for tungstenbased materials and Cu alloys by tailoring joint interfaces.These technologies encompass:(i)direct diffusion bonding of W and Cu using high-temperature conditions(close to the melting point of Cu)structure,with an emphasis on elucidating the underlying thermodynamic mechanisms through the construction of thermodynamic models and molecular dynamics simulations;(ii)combined technologies involving surface treatments of tungsten-based materials,copper embedding,and diffusion bonding,along with an analysis of the mechanisms that enhance joint properties through tailored interface structures.The review also provides insights into future research directions for bonding between tungsten-based materials and Cu alloys.These advancements may offer significant support for plasma-facing components in future thermonuclear fusion reactors.
