摘要
使用延迟分离涡模拟(DDES)方法研究了来流马赫数0.85的矩形开放腔体气动声学环境并对三种被动控制措施进行分析。流场控制措施包括锯齿形、平板形和圆柱形三种前缘扰流装置。通过空腔仿真结果和带有被动控制措施的结果对比后表明:三种前缘装置均可以有效的降低腔体内部的声压等级,尤其是低频段的第二阶主导噪声的声压级幅值降低7～10 dB。三种被动控制措施对全局声压级的抑制平均达到了5 dB。
Delayed detached eddy simulation(DDES)approach was performed to numerically investigate an open cavity and the effects of passive control devices on the edge of this rectangular open cavityon Mach0.85.The passive control methods includes saw tooth spoiler,flat top spoiler and cross flow rod.The simulation of those three caseswere compared with the experimentand the simulation results of clean cavity.The results shows that the sound pressure level in the cavity is suppressed effectively,with the second tone induced by7~10dB.The overall sound pressure level inside the cavity is induced up to5dB.
作者
刘瑜
石泳
童明波
赵飞
LIU Yu;SHI Yong;TONG Ming-bo;ZHAO Fei(Institute of Manned Space System Engineering,Beijing 100094,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空计算技术》
2018年第6期6-10,共5页
Aeronautical Computing Technique
基金
国家自然科学基金项目资助(11802015)
江苏省高校优势学科建设工程项目资助
中央高校基本科研业务费专项资金资助
