Travis Brandon R, Leo Hwa L, Shah Parina A, Frakes David H, Yoganathan Ajit P
School of Chemical Engineering, Georgia Institute of Technology and Emory University, Atlanta 30332, USA.
J Biomech Eng. 2002 Apr;124(2):155-65. doi: 10.1115/1.1448519.
In this work, estimates of turbulence were made from pulsatile flow laser Doppler velocimetry measurements using traditional phase averaging and averaging after the removal of cyclic variation. These estimates were compared with estimates obtained from steady leakage flow LDV measurements and an analytical method. The results of these studies indicate that leakage jets which are free and planar in shape may be more unstable than other leakage jets, and that cyclic variation does not cause a gross overestimation of the Reynolds stresses at large distances from the leakage jet orifice.
在这项工作中，利用传统的相位平均法以及去除周期性变化后的平均法，通过脉动流激光多普勒测速测量对湍流进行了估计。这些估计值与从稳态泄漏流激光多普勒测速测量以及一种分析方法获得的估计值进行了比较。这些研究结果表明，形状自由且呈平面状的泄漏射流可能比其他泄漏射流更不稳定，并且周期性变化不会在距泄漏射流孔口较大距离处导致雷诺应力的严重高估。
