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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (17): 128126-128126.doi: 10.7527/S1000-6893.2022.28126

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Test technology of longitudinal stage separation for two-stage-to-orbit vehicle in shock tunnel

Yue WANG1,2, Yunpeng WANG1,2(), Zonglin JIANG1,2   

  1. 1.State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China
    2.School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2022-10-18 Revised:2022-10-25 Accepted:2022-11-30 Online:2023-09-15 Published:2022-12-06
  • Contact: Yunpeng WANG E-mail:wangyunpeng@imech.ac.cn
  • Supported by:
    National Natural Science Foundation of China(11672357)

Abstract:

The multi-body separation problem in hypersonic flow is a key technical issue in the research and development of aerospace multibody vehicles. Due to the complexity of high-speed flow during separation, the wind tunnel test study is extremely challenging, particularly the shock tunnel separation test. The test flow of the shock tunnel has the characteristics of high flow speed and high enthalpy, which can simulate the flow characteristics with gas effect at high temperature and duplicate the reliable aerodynamic and thermal characteristics of hypersonic multibody separation. However, its effective test time is short in order of milliseconds; therefore it is difficult to conduct dynamic tests of separation. In this study, a High-speed Pneumatic Ejection to Launch vehicle model System (HPELS) applied to the shock tunnel is proposed, which enables the model to actively complete the separation within the short test time. The precise time calibration and timing control methods of HPELS delay time and separation time are introduced in detail. For the high-performance evaluation of the separation trajectory and aerodynamic parameters during separation, a non-contact separation motion trajectory capture and aerodynamic parameter measurement technology based on schlieren images is developed. The safety stage separation of Two Stages to Orbit (TSTO) vehicle is a typical high-speed separation problem. In view of the longitudinal separation scheme and parallel-staged TSTO vehicle proposed by the author, the effectiveness of the application of the high-speed dynamic multi-body separation test technology is verified in the JF-12 duplicated flight conditions shock tunnel. Meanwhile, the principle of the parallel-staged TSTO safety longitudinal stage separation scheme is verified in the shock tunnel for the first time. Comparison of the experimental results with the numerical results shows good agreement.

Key words: two stages to orbit (TSTO), multi-body separation, hypersonic, stage separation, trajectory capture, shock tunnel

CLC Number: