Influence of Pressurization Methods on Cryogenic Helium Pressurization in Rocket Fuel Tank

doi:10.16183/j.cnki.jsjtu.2020.265

Abstract

Abstract:

To verify the technical scheme of cryogenic helium pressurization in the fuel tank of liquid oxygen (LOX)-kerosene rocket, a test device was established and the ground simulation test was conducted. The influences of different pressurization methods on pressure control stability, ullage temperature distribution in tank, helium consumption, gas-liquid mixture, and liquid freezing of pressurized drainage process were investigated. The pressurization method specifically includes pressurization outlet position, diffuser form, and pressurant flow rate. The results show that when pressurized from the liquid zone, the heat exchange of pressurized gas is more sufficient, which reduced the gas consumption by 33.1% compared with that in the ullage zone. However, the stability of pressure control is less satisfying. The form of diffuser has little influence on the gas consumption and the temperature distribution of ullage. The helium consumption for pressurization at a small flow rate is less than that at a high flow rate. For example, when the drainage flow is 10 L/s, the helium consumption can be reduced by 20% compared with that at 40 L/s. Under all experimental conditions, neither ice due to local supercooling in the tank nor bubbles in the drainage pipeline are observed. The test results verify the feasibility of the proposed scheme, and provide a reference for structural design and working condition regulation of the cryogenic helium pressurization system in rocket.

Key words: fuel tank, cryogenic helium, pressure draining, liquid oxygen (LOX)-kerosene, ground text

CLC Number:

V421.4
V511

ZOU Zhenfeng, REN Feng, LI Xiaoci, DUAN Haiyang, DU Hailang, HUANG Yonghua. Influence of Pressurization Methods on Cryogenic Helium Pressurization in Rocket Fuel Tank[J]. Journal of Shanghai Jiao Tong University, 2022, 56(3): 386-394.

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测量设备	编号或名称	位置	型号	测量范围	精度
温度传感器	T1、T2	节流圈上游	PT100	273~353 K	±1 K
	T3、T4	节流圈下游	PT100	273~353 K	±1 K
	T5	换热器出口	PT100	73~353 K	±1 K
	T6	贮箱入口	PT100	73~353 K	±1 K
	T7	敞口杜瓦内部	PT100	73~353 K	±1 K
	NT1~NT6	贮箱内部	PT100	73~573 K	±1 K
压力传感器	P1、P2	节流圈上游	MPM489	0~3 MPa	0.25%
	P3、P4	节流圈下游	MPM489	0~1 MPa	0.25%
	P5	换热器出口	MPM489	0~1 MPa	0.25%
	P6	二位三通阀上游	MPM489	0~1 MPa	0.25%
	P7	贮箱顶部	MPM489	0~1 MPa	0.25%
其他	气体流量计	气体管路入口	RCCT34	0~100 g/s	0.25%
	液体流量计	贮箱排液出口	FLEXIM ADM 6725	0~60 L/s	0.25%
	差压计	可视过滤器两端	EAJ110A	0~100 kPa	0.25%
	差压液位计	贮箱侧壁	MDM3051S-DPHC	0~40 kPa (0~3 m)	0.10%

工况	增压位置	扩散器形式	q_m/(g·s^-1)	q_V_,set/(L·s^-1)
1	液体区	径向	30	50
2	气枕区	径向	30	40
3	气枕区	直管	30	40
4	气枕区	径向	10	10
5	气枕区	直管	10	10

工况	增压位置	扩散器形式	q_V/(L·s^-1)	Q/(g·L^-1)
1	液体区	径向	49.62	0.517
2	气枕区	径向	40.53	0.731
3	气枕区	直管	42.62	0.715
4	气枕区	径向	10.92	0.599
5	气枕区	直管	11.22	0.609
6	气枕区	径向	50.00	0.773