两相流对固体火箭发动机塞式喷管性能的影响

doi:10.7527/S1000-6893.2022.27890

Abstract

Abstract:

To study the effect of gas-solid two-phase flow on performance of the plug nozzle in solid rocket motor， the two-phase flow field of annular plug nozzle was calculated by particle track model， the movement track of particles in flow field was identified， the influence of different particle sizes on flow field and thrust performance of nozzle was analyzed. Combined with traditional bell nozzle， the thrust performance of plug nozzle and bell nozzle under different working conditions was compared， the influence of gas-solid two-phase flow on the height compensation characteristics of plug nozzle was analyzed. The results show that with the increase of particle size， the particles will appear staggered motion， which increases the complexity of the flow field. And there is only one collision between a single particle and the truncated plug， and the larger the particle size， the more advanced the collision position. The thrust performance loss caused by single particle size is proportional to particle size and inversely proportional to working pressure ratio. Under real working conditions， compared with bell nozzle， gas-solid two-phase flow brings about 3% more thrust efficiency loss to plug nozzle in the design condition， and thrust efficiency eventually tend to be weaker than the bell nozzle at 2.7%， but plug nozzle still has considerable performance advantage in low pressure ratio condition.

Key words: rocket nozzles, annular plug nozzles, altitude compensated, two?phase flow, solid rocket motor

CLC Number:

V430

Hongjin LI, Junwei LI, Kan XIE, Xiang LI, Zheng YANG, Ningfei WANG. Effect of two-phase flow on performance of plug nozzle in solid rocket motor[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(16): 127890-127890.

Figures/Tables 22

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References 24

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型面参数	数值	型面参数	数值
收敛比	3	喉部长度/m	0.01
扩张比	52	扩张段长度/m	1.104 9
喉径/m	0.163	初始扩张半角/（°）	29
出口直径/m	1.175 4	出口半角/（°）	17
收敛段长度/m	0.097 8

喷管	燃烧室平均压强/MPa	文献试验结果/N	本文仿真结果/N	误差/%
Aerospike 1	2.18	3 613.40	3 620.53	0.2
Aerospike 3	1.92	3 282.32	3 126.86	4.7

海拔/km	推力效率损失率（钟形）/%			推力效率损失率（塞式）/%
海拔/km	-1 μm	-10 μm	-50 μm	-1 μm	-10 μm	-50 μm
0	7.6	10.5	13.2	9.8	15.0	16.5
5	7.2	10.0	13.7	9.3	15.0	16.4
10	6.9	9.5	13.0	8.5	13.7	15.9
15	6.5	9.0	12.4	8.2	13.1	15.2
20	6.3	8.7	12.0	7.8	12.6	14.6
25	6.1	8.4	11.6	7.6	12.2	14.1
30	6.0	8.2	11.3	7.4	11.9	13.8

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Effect of two-phase flow on performance of plug nozzle in solid rocket motor

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