摘要
本文给出了埋入式进气道内湍流流场的雷诺应力测量和频谱分析结果。在研究中利用“Ｘ”双斜丝探头测量了低速下埋入式进气道出口截面上六个雷诺应力分量沿径向和周向的分布，继而把两个单丝热线探头分别置于进气道的进、出口，通过ＣＦ－９２０频谱仪分析两个动态信号的自功率谱和互相关性质。结果表明埋入式进气道出口近壁区气流的雷诺应力呈明显的各向异性，其上游的气流脉动是按气流平均速度向下游传输的。
The results of the measurement of Reynolds stresses and spectral analysis for a turbulent flow in a submerged air intake are presented in this paper.At the exit section of the intake six Renolds stresses are measured with X hot wire probe,which is rotatable around its longitudinal axes.Furthermore,the unsteaty characteristics of the flow in the intake are investigated with two single hot wire probes.The results show that the Reynolds stresses of the flow near the wall at the exit are abviously nonisotropic and the flow fluctuation transport downstream with the flow speed.
出处
《空气动力学学报》
CSCD
北大核心
1999年第1期80-86,共7页
Acta Aerodynamica Sinica
