Statistical properties of spherical shock waves propagating through grid turbulence, turbulent cylinder wake, and laminar flow
Statistical properties of spherical shock waves propagating through grid turbulence, turbulent cylinder wake, and laminar flow
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通过网格湍流、湍流圆柱尾流和层流传播的球形冲击波的统计特性
DOI：
10.1088/1402-4896/aafde2
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发表时间：
2019
期刊：
影响因子：
2.9
通讯作者：
Sakai Yasuhiko
中科院分区：
文献类型：
--
作者：
Inokuma Kento;Watanabe Tomoaki;Nagata Koji;Sakai Yasuhiko
报道了球面激波通过单柱、双柱、网格湍流和层流湍流尾迹传播的风洞实验，比较了它们对激波的影响。冲击波后的超压是在平板上测量的，而流向速度是在测量平板和激波喷射位置之间的流点处测量的。冲击波到达时观测到的峰值超压平均值被圆柱尾迹的平均速度缺陷减去。均方根(RMS)峰值超压波动除以平均峰值超压随湍流增大，且随RMS速度波动而增大。计算了峰值超压波动与低通过滤流体速度之间的相关系数。对于压力测量点激波射线通过的位置处的流体，存在较强的正相关关系。具有强相关性的速度脉动的长度尺度与湍流的积分长度尺度有关。在双圆柱尾迹实验中，经过一个圆柱尾迹的冲击波在到达测量板之前再次与另一个圆柱尾迹相互作用。第一个尾迹的速度脉动的相关系数被第二个尾迹削弱，当第二个尾迹的均方根速度起伏较大时，这种影响变得更加重要。
Wind tunnel experiments are reported for a spherical shock wave propagating through turbulent wakes of a single cylinder, double cylinders, grid-turbulence, and a laminar flow, whose influences on the shock wave are compared. Overpressure behind the shock wave is measured on a plate while streamwise velocity is measured at the flow point between the measurement plate and the location of the shock wave ejection. Average of peak-overpressure observed upon arrival of the shock wave is decreased by the mean velocity defect of the cylinder wake. Root mean squared (rms) peak-overpressure fluctuation divided by the averaged peak-overpressure is increased by turbulence, and it becomes larger with the rms velocity fluctuation. Correlation coefficients are calculated between fluctuations of peak-overpressure and low-pass filtered fluid velocity. The strong positive correlation is found for the fluid at the location where the shock ray toward the pressure measurement point passes. The length scale of velocity fluctuation with the strong correlation is related to the integral length scale of turbulence. In the double-cylinder wake experiments, the shock wave that has passed one cylinder wake interacts again with another cylinder wake before it reaches the measurement plate. The correlation coefficient for the velocity fluctuation of the first wake is weakened by the second wake, and this influence becomes more important when the rms velocity fluctuation of the second wake is larger.
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音爆飞行研究 - 飞机运行和大气对音爆特征的一些影响
DOI：
10.1121/1.1939638
发表时间：
1965
期刊：
--
影响因子：
--
作者：
D. Maglieri
通讯作者：
D. Maglieri
日鞘磁场的 Tsallis 统计
DOI：
10.1086/505577
发表时间：
2006
期刊：
影响因子：
--
作者：
L. Burlaga;A. Viñas;N. Ness;M. Acuna
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M. Acuna
研究音爆通过湍流传播的模型实验。
DOI：
10.1121/1.424339
发表时间：
1998
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
B. Lipkens;D. Blackstock
通讯作者：
D. Blackstock
通过湍流狭缝射流调制弱冲击波
DOI：
--
发表时间：
2010
期刊：
Shock Waves J.
影响因子：
--
作者：
J.H.Kim;A.Sasoh;A.Matsuda
通讯作者：
A.Matsuda