Volume 40 Issue 6
Nov.  2020
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GUO Bin, ZHAO Jianfu, LI Kai, HU Wenrui. Destratification in Hydrogen Propellant Tank in Space by Jet Injection[J]. Journal of Space Science, 2020, 40(6): 1052-1065. doi: 10.11728/cjss2020.06.1052
Citation: GUO Bin, ZHAO Jianfu, LI Kai, HU Wenrui. Destratification in Hydrogen Propellant Tank in Space by Jet Injection[J]. Journal of Space Science, 2020, 40(6): 1052-1065. doi: 10.11728/cjss2020.06.1052

Destratification in Hydrogen Propellant Tank in Space by Jet Injection

doi: 10.11728/cjss2020.06.1052
  • Received Date: 2019-10-26
  • Rev Recd Date: 2020-01-03
  • Publish Date: 2020-11-15
  • Hydrogen plays a vital role in the future energy system as a space propellant, but it is sensitive to heat leakage from the environment because of low boiling point and low density. On the other hand, the buoyancy convection in the space microgravity environment is weakened and even completely suppressed. When there is local heat leakage on the wall of the propellant tank, temperature stratification will happen around the heat leakage source, causing local overheating. This affects the interfacial heat and mass transfer, causing the tank pressure to rise, and jeopardize the structural safety of the system. To prevent the tank pressure from rising above the design of limits, venting or active pressure control techniques must be implemented. The cryogenic jet mixing is an effective means to suppress temperature stratification. The cryogenic fluid is mixed with the fluid inside the tank through a jet nozzle to reduce the local high temperature and achieve uniform temperature. In this paper, the temperature stratification phenomenon caused by local heat leakage under microgravity condition is numerically simulated by using a fully filled two-dimensional scale tank model, and then the influence of different cryogenic jet mixing conditions on eliminating the temperature stratification effect is analyzed.

     

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