跨越第二宇宙速度的膨胀管风洞研制

doi:10.7527/S1000-6893.2022.27729

Abstract

Abstract:

In order to solve the high enthalpy real gas effect， radiation heat transfer and other key aerodynamic problems involved in reentry vehicles， and meet the needs of next generation spacecraft development for high enthalpy environment simulation， China Aerodynamics Research and Development Center has built a productive piston-driven high enthalpy expansion tunnel. This paper mainly introduces some key technologies and solutions of this expansion tunnel， including aerodynamic design， piston drive， and design of large-diameter impact resistant diagram， matching high enthalpy transient testing and other technologies， preliminary validation and calibration results. The flow field debugging results show that the key technical indicators of the high enthalpy expansion tunnel， such as gas flow velocity， enthalpy and effective test time range， are 1.63-11.50 km/s， 1.5-71.7 MJ/kg and 0.1-1.1 ms， respectively. This expansion tunnel has the ground test simulation capability to study the real gas effects of high enthalpy.

Key words: expansion tunnel, piston drive, high enthalpy real gas effect, light gas drive, flow calibration

CLC Number:

Zhiguo LYU, Hongming GONG, Yu CHANG, Zhenyang LIAO, Yong ZHONG. Development of an expansion tunnel with gas flow speed greater than escape velocity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(S2): 138-151.

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序号	V_∞/（km·s^-1）	H₀/（MJ·kg^-1）	t/ｍs	T_∞/K	ρ_∞/（kg·m^-3）	P_∞/kPa
1	2.5	3.9	1.10	702	0.087 0	18.10
2	8.1	35.3	0.32	2 574	0.002 7	2.07
3	11.5	71.7	0.10	2 340	1.55×10^-4	0.12

风洞	总长/m	压缩管内径/mm	压缩管长度/m	加速段长度/m	加速段直径/mm	喷管长度/m	喷管出口直径/mm
X3	65	500	12	24	182.6	3.007	447
本文	116	600	21.8	30	200	7.5	800

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Development of an expansion tunnel with gas flow speed greater than escape velocity

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