Correction Method for Particle Velocimetry Data Based on the Stokes Drag Law
Correction Method for Particle Velocimetry Data Based on the Stokes Drag Law
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DOI：
10.2514/1.30962
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发表时间：
2007-11
期刊：
影响因子：
2.5
通讯作者：
S. Koike;Hidemi Takahashi;Koichi Tanaka;M. Hirota;K. Takita;G. Masuya
中科院分区：
文献类型：
--
作者：
S. Koike;Hidemi Takahashi;Koichi Tanaka;M. Hirota;K. Takita;G. Masuya
提出了一种基于斯托克斯阻力定律的示踪粒子流速测量修正方法。该方法可由实测速度及其空间梯度计算修正速度，而无需求解整个流场。利用粒子图像测速技术对马赫数为1.8的超声速横向喷流进行了速度测量。将修正方法应用于粒子图像测速数据得到的速度场。修正后的数据更清楚地显示了测量区域内激波的位置和形状。修正后的激波下游峰值速度更接近理论值。将修正后的射流流线与原始粒子图像测速数据进行了比较。修正后的数据的流线比原始数据的要低。
A correction method based on the Stokes drag law was developed for flow velocimetry using tracer particles. The present method can be used to calculate the corrected velocity from the measured velocity and its spatial gradient without the need to solve the whole flowfield. Velocity measurement was conducted for sonic transverse injection into Mach 1.8 flow using particle image velocimetry. The correction method was applied to the velocity field obtained from the particle image velocimetry data. The corrected data showed the positions and shapes of the shock waves in the measurement region more clearly. The corrected peak velocity downstream of the shock waves became closer to the theoretical values. The jet streamlines calculated from the corrected and original particle image velocimetry data were compared. The streamlines from the corrected data went lower than those from the original data.