前缘高频振动对亚声速开式空腔内强噪声影响的数值研究
收稿日期: 2015-05-14
修回日期: 2015-08-06
网络出版日期: 2015-08-18
基金资助
国家自然科学基金(51075329,51375385);航空科学基金(20131553019);陕西省自然科学基础研究计划项目(2014JM2-6116);西北工业大学研究生创意创新种子基金(Z2015069)
Numerical research of high frequency vibration effect on subsonic open cavity macro-noise
Received date: 2015-05-14
Revised date: 2015-08-06
Online published: 2015-08-18
Supported by
National Natural Science Foundation of China (51075329,51375385); Aeronautical Science Foundation of China (20131553019); Natural Science Basic Research Plan in Shaanxi Province (2014JM2-6116); The Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University (Z2015069)
宁方立 , 史红兵 , 丘廉芳 , 卫金刚 . 前缘高频振动对亚声速开式空腔内强噪声影响的数值研究[J]. 航空学报, 2015 , 36(12) : 3843 -3852 . DOI: 10.7527/S1000-6893.2015.0223
Cavity flow phenomena widely exist in all kinds of aerospace vehicles. Research on the complicated physical phenomena in cavities is of great importance to engineering applications. Large eddy simulation method is used to simulate the open cavity noise. We apply high frequency wall vibration at the leading edge of the cavity and investigate its influence on the mode and the noise inside the cavity. The study shows that the peak of the pure tone noise inside the cavity decreases as the frequency of the wall vibration increases. When the vibration frequency at the leading edge reaches 4000 Hz, the peak of the pure tone noise of the main and second mode in the interior of the cavity can be reduced by 15 dB and 17 dB respectively. Therefore, the peak of the pure tone noise inside the cavity can be reduced significantly with the high frequency wall vibration applied at the leading edge of the cavity. This work will pave the way to extend the applications of subsonic open cavities.
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