关键词: 煤油, 温度分层, 鼓泡, 液氮降温系统

Abstract:

In order to find the reason of the thermal stratification in kerosene storage tank after cooling, the temperature data is analyzed from different depths of the kerosene tank. Combined with the pipeline layout, the hot upside and the cold downside of the kerosene stratification are induced by the stagnation area existing in the upside during the kerosene cooling flow. Comparing the bubble with the pump reflux, the results show that the bubble has a good effect in eliminating the vertical thermal stratification of the kerosene, and the pump reflux turns out to be of no effect. To accurately forecast the temperature of kerosene after cooling, different methods of temperature regulation are used in multiple experiments, and the target temperature calculation model of the kerosene regulating process is established, which could be used to judge the stop time of the kerosene cooling. The bubble and the temperature regulation calculation model has been successfully applied in TZ-1 launch mission, and effectively guarantee the temperature quality of the kerosene propellant.

Key words: Kerosene, Thermal stratification, Bubble, Liquid nitrogen cooling system