标题： 提高平面 PIV 的性能 显示英文标题

标题： Increasing performance of planar PIV

摘要： 迄今为止，用于双脉冲测量的PIV迭代图像变形方法由于在许多科学和工业应用中的鲁棒性，被广泛应用于实验流体力学。 然而，它有一个已知的局限性，与由于使用高阶方案计算必要速度导数时出现的误差导致的图像变形困难有关。 在本研究中，我们提出了一种简单的方法，有助于显著提高测量速度及其导数的准确性，从而提高空间分辨率。 该方法不需要恢复错误的速度矢量，避免了使用有限差分方案进行相关窗口变形时必要的数值导数计算，并且可以轻松地在实践中应用。 显示英文摘要

摘要： To date, the iterative image deformation method of PIV for two-pulse measurements is widely used in experimental fluid dynamics due to its robustness in many scientific and industrial applications. However, it has a known limitation associated with the difficulty of image deformation due to errors that occur when calculating the necessary velocity derivatives using higher-order schemes. In this work, we propose a simple method that helps to noticeably improve the accuracy of the measured velocities and their derivatives, and thereby increase the spatial resolution. The method does not require the recovery of erroneous velocity vectors, avoids the numerical calculation of derivatives necessary for the interrogation window deformation using finite difference schemes, and can be easily applied in practice.