As an important oil production technology, burning reservoir can successfully obtain oil source. One of the factors is the correct selection of ignition device.It can be said that in the whole process of burning oil l...As an important oil production technology, burning reservoir can successfully obtain oil source. One of the factors is the correct selection of ignition device.It can be said that in the whole process of burning oil layer, ignition is the core technology, which is related to whether the burning oil layer can be started stably and safely.The traditional ignition method of burning oil layer needs to adopt the ignition device with complex structure, which not only makes the working environment more dangerous, but also easily causes the damage of equipment casing.On this basis, this paper proposes to design a disposable ignition device. Compared with the traditional ignition device, the device has simple structure and smooth installation. It is used in burning oil layer to avoid putting workers in dangerous environment.The solid fuel contained in the disposable ignition device can provide enough heat for the burned oil layer to ensure the smooth start of the burned oil layer after ignition, and the device can be directly discarded after use without recycling.Through the actual case application, it is found that the disposable ignition device has high application feasibility and can effectively improve the ignition rate of burning oil layer.展开更多
Energetic Semiconductor bridge(ESCB)based on reactive multilayered films(RMFs)has a promising application in the miniature and intelligence of initiator and pyrotechnics device.Understanding the ignition enhancement m...Energetic Semiconductor bridge(ESCB)based on reactive multilayered films(RMFs)has a promising application in the miniature and intelligence of initiator and pyrotechnics device.Understanding the ignition enhancement mechanism of RMFs on semiconductor bridge(SCB)during the ignition process is crucial for the engineering and practical application of advanced initiator and pyrotechnics devices.In this study,a one-dimensional(1D)gas-solid two-phase flow ignition model was established to study the ignition process of ESCB to charge particles based on the reactivity of Al/MoO_(3) RMFs.In order to fully consider the coupled exothermic between the RMFs and the SCB plasma during the ignition process,the heat release of chemical reaction in RMFs was used as an internal heat source in this model.It is found that the exothermal reaction in RMFs improved the ignition performance of SCB.In the process of plasma rapid condensation with heat release,the product of RMFs enhanced the heat transfer process between the gas phase and the solid charge particle,which accelerated the expansion of hot plasma,and heated the solid charge particle as well as gas phase region with low temperature.In addition,it made up for pressure loss in the gas phase.During the plasma dissipation process,the exothermal chemical reaction in RMFs acted as the main heating source to heat the charge particle,making the surface temperature of the charge particle,gas pressure,and gas temperature rise continuously.This result may yield significant advantages in providing a universal ignition model for miniaturized ignition devices.展开更多
文摘As an important oil production technology, burning reservoir can successfully obtain oil source. One of the factors is the correct selection of ignition device.It can be said that in the whole process of burning oil layer, ignition is the core technology, which is related to whether the burning oil layer can be started stably and safely.The traditional ignition method of burning oil layer needs to adopt the ignition device with complex structure, which not only makes the working environment more dangerous, but also easily causes the damage of equipment casing.On this basis, this paper proposes to design a disposable ignition device. Compared with the traditional ignition device, the device has simple structure and smooth installation. It is used in burning oil layer to avoid putting workers in dangerous environment.The solid fuel contained in the disposable ignition device can provide enough heat for the burned oil layer to ensure the smooth start of the burned oil layer after ignition, and the device can be directly discarded after use without recycling.Through the actual case application, it is found that the disposable ignition device has high application feasibility and can effectively improve the ignition rate of burning oil layer.
基金supported by the National Natural Science Foundation of China(Grant Nos.22275092,52102107 and 52372084)the Fundamental Research Funds for the Central Universities(Grant No.30923010920)。
文摘Energetic Semiconductor bridge(ESCB)based on reactive multilayered films(RMFs)has a promising application in the miniature and intelligence of initiator and pyrotechnics device.Understanding the ignition enhancement mechanism of RMFs on semiconductor bridge(SCB)during the ignition process is crucial for the engineering and practical application of advanced initiator and pyrotechnics devices.In this study,a one-dimensional(1D)gas-solid two-phase flow ignition model was established to study the ignition process of ESCB to charge particles based on the reactivity of Al/MoO_(3) RMFs.In order to fully consider the coupled exothermic between the RMFs and the SCB plasma during the ignition process,the heat release of chemical reaction in RMFs was used as an internal heat source in this model.It is found that the exothermal reaction in RMFs improved the ignition performance of SCB.In the process of plasma rapid condensation with heat release,the product of RMFs enhanced the heat transfer process between the gas phase and the solid charge particle,which accelerated the expansion of hot plasma,and heated the solid charge particle as well as gas phase region with low temperature.In addition,it made up for pressure loss in the gas phase.During the plasma dissipation process,the exothermal chemical reaction in RMFs acted as the main heating source to heat the charge particle,making the surface temperature of the charge particle,gas pressure,and gas temperature rise continuously.This result may yield significant advantages in providing a universal ignition model for miniaturized ignition devices.
