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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (S2): 138-151.doi: 10.7527/S1000-6893.2022.27729

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

Zhiguo LYU1(), Hongming GONG1,2, Yu CHANG1,2, Zhenyang LIAO1, Yong ZHONG1   

  1. 1.Hypervelocity Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China
    2.Laboratory of Aerodynamics in Multiple Flow Regimes,China Aerodynamics Research and Development Center,Mianyang 621000,China
  • Received:2022-06-30 Revised:2022-07-27 Accepted:2022-08-16 Online:2022-12-25 Published:2022-08-31
  • Contact: Zhiguo LYU E-mail:lzgde2003@126.com
  • Supported by:
    National Level Project

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: