| 摘要: |
| 采用大涡模拟方法研究了介质温度和工作压强对模拟燃烧室中压强振荡的影响,旨在获得相同发动机结构条件下,冷流实验和发动机热试车之间压强振荡的联系,探索采用冷流实验方法研究实际发动机流动稳定性的可能性。研究结果表明对于相同结构的发动机,冷热流之间存在很大程度的一致性,全尺寸发动机的实验数据和数值模拟结果也给予了验证,介质温度决定了压强振荡的频率,工作压强决定了振荡的振幅。 |
| 关键词: 固体火箭发动机 压强振荡 声涡耦合 温度 压强 燃烧室 |
| DOI： |
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| Effects of Temperature and Pressure on Pressure Oscillation in the Chamber of Solid Rocket Motor |
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LIU Pei-jin, YANG Shang-rong, CHEN Xiao-long
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Science and Technology on Combustion, Internal Flow and Thermal-Structure Laboratory, Northwestern Polytechnical University, Xi’an 710072,China
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| Abstract: |
| Large eddy simulation was used to study the effects of temperature and pressure on the oscillation in chamber, aiming to explore the pressure oscillation relationship between cold flow test and hot fire, and the possibility of using cold flow test to predict the instability of real rocket motor. The results show obvious consistency between hot and cold flow simulation at the same configuration. The experimental results of full scale motor and numerical simulation validate this consistency.The temperature dominates the oscillation frequency, and the operation pressure dominates the oscillation amplitude. |
| Key words: Solid rocket motor Pressure oscillation Acoustics-vortex coupling Temperature Pressure Combustion chamber |
