| Aerodynamic characteristics of store during lateral jet assisted separation from cavity using free drop technique |
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| 作者姓名： | Fei XUE Yipeng REN Zheng LI Cong XU Dechen WEI Xiaolu MAO Zenghui JIANG |
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| 作者单位： | 1. China Academy of Aerospace Aerodynamics;2. Bejing Institute of Astronautical Systems Engineering;3. China Academy of Launch Vehicle Technology;4. Institute of Aeronautical Engineering and Technology, Binzhou University;5. Nanhang Jincheng College |
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| 基金项目： | supported by the National Natural Science Foundation of China (Nos. U21B2054 and 11772317)； |
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| 摘 要： | Aimed at the problem of store separation from internal cavity, this paper innovatively puts forward a separation scheme of using lateral jet to assist store safe separation. The jet ensures that the store is continuously subjected to down head moment during separation, so as to ensure safe separation. The wind tunnel free drop test technique with lateral jet is established, which can ensure that there is no support interference in the motion process of the store and more truly simulate the motio...
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| 收稿时间： | 2 September 2021 |
Aerodynamic characteristics of store during lateral jet assisted separation from cavity using free drop technique |
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| Fei XUE,Yipeng REN,Zheng LI,Cong XU,Dechen WEI,Xiaolu MAO,Zenghui JIANG.Aerodynamic characteristics of store during lateral jet assisted separation from cavity using free drop technique[J].Chinese Journal of Aeronautics,2023,36(1):139-151. |
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| Institution: | 1. China Academy of Aerospace Aerodynamics, Beijing 100074, China;2. Bejing Institute of Astronautical Systems Engineering, Beijing 100076, China;3. China Academy of Launch Vehicle Technology, Beijing 100076, China;4. Institute of Aeronautical Engineering and Technology, Binzhou University, Binzhou 256600, China;5. Nanhang Jincheng College, Nanjing 211156, China |
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| Abstract: | Aimed at the problem of store separation from internal cavity, this paper innovatively puts forward a separation scheme of using lateral jet to assist store safe separation. The jet ensures that the store is continuously subjected to down head moment during separation, so as to ensure safe separation. The wind tunnel free drop test technique with lateral jet is established, which can ensure that there is no support interference in the motion process of the store and more truly simulate the motion of the store. The feasibility of the new separation scheme is proved by wind tunnel test. The test shows that the new scheme can also change the more dangerous state into a safe state. Through the analysis of the test data, the pitching moment coefficients of the store under different pressures in the high-pressure cylinder are obtained, and the effects of aircraft and cavity on the pitching moment of the store are obtained. The 3 stages of store passing through cavity shock wave are found. The results show that the lateral jet provides the store with continuous head down moment, and makes the store overcome the head up moment caused by the shock wave in front of the cavity, so as to ensure the safety of separation. |
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| Keywords: | Compressible flow Internal cavity Lateral jet Store separation Unsteady test Wind tunnel free drop test |
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