Wind tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds
Wind tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds
复制标题
DOI：
--
复制
发表时间：
1964-10
期刊：
影响因子：
--
通讯作者：
J. Rossiter
中科院分区：
文献类型：
--
作者：
J. Rossiter
本文测量了作用在2ft × 1 tr ft跨音速风洞顶部和顶部一系列矩形空腔后面的时间平均压力和非定常压力。结果表明，非定常压力中既有随机分量，又有周期分量。随机分量在较浅的空腔（长/深比> 4）中占主导地位，并且在后壁附近最强烈。在深腔（长深比< 4）中周期波成分占优势，并可形成驻波图。有人建议，周期性的成分是由于一个类似的现象，在引起边缘音激发腔体内的声共振。可以通过在空腔前部安装一个小扰流器来抑制。
Measurements have been made of the time average and unsteady pressures acting on the roof and behind a series of rectangular cavities set in the roof of the 2 ft x 1tr ft transonic tunnel. It was found that the unsteady pressures contain both random and periodic components. The random component predominates in the shallower cavities (length/depth ratio> 4) and is most intense near the rear wall. The periodioc component predominates in the deeper cavities (length/depth ratio < 4) and may form standing wave patterns. It is suggested that the periodic component is due to an acoustic resonance within the cavity excited by a phenomenon similar to th at causing edge-tones. It may be suppressed by fixing a small spoiler at the front of the cavity.