| 旋转导弹模型非定常表面压力测试技术研究 |
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| 引用本文： | 肖恒,顾蕴松,孙之骏.旋转导弹模型非定常表面压力测试技术研究[J].实验流体力学,2020,34(4):62-67. |
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| 作者姓名： | 肖恒 顾蕴松 孙之骏 |
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| 作者单位： | 南京航空航天大学航空学院 非定常空气动力学与流动控制工业和信息化部重点实验室, 南京 210016 |
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| 摘 要： | 为了获得旋转导弹模型表面复杂的压力变化，设计了一套嵌入式无线压力测量系统，该系统能够以1 kHz的采样频率对8个压力通道进行同步采集。该绝对压力测量系统的量程为30 PSI，静态测量误差小于5/10 000；在连接10 cm的测压软管后，系统的动态延迟小于1.16 ms，信号幅值衰减小于1%。利用该嵌入式的无线测压系统，在高速风洞中开展了模型表面压力测试，对旋转导弹模型的关键区域多点的表面压力进行了测量，获得了表面压力的动态特征。结果表明:所提出的非定常表面压力测试技术可同步多点测量旋转导弹模型表面压力，为开展相关旋转模型气动特性风洞试验提供了一种有效的非定常表面压力测试手段。
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| 关 键 词： | 旋转导弹 嵌入式测压系统 动态压力测量 同步测量 |
| 收稿时间： | 2019-08-05 |
Unsteady surface pressure measurements of standard spinning missile model in supersonic flow |
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| Affiliation: | Key Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | In order to obtain complex pressure changes of the spinning missile model, an embedded wireless pressure measurement system was designed, which can simultaneously acquire 8 pressure channels at a sampling frequency of 1 kHz. The absolute pressure measurement system has a range of 30 PSI and a static measurement error of less than 5/10 000. After connecting a 10 cm pressure measuring hose, the delay of the system is less than 1.16 ms, and the signal amplitude attenuation is less than 1%. By using the embedded wireless pressure measurement system, the model surface pressure test was carried out in a high-speed wind tunnel. The pressure in the critical area of the spinning missile model is measured and the dynamic characteristic of the surface pressure is obtained. The result shows that the unsteady pressure measurement technique proposed in this paper can synchronously measure the surface pressure of rotating model, which provides an effective unsteady surface pressure measurement method for wind tunnel test of rotating missile. |
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