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数字粒子图像测速技术 DPIV(Digital Particle Image Velocimetry)是一种快速提取流场速度的方法 ,但测速精度较低。已有的改进方法虽然使精度得到了提高 ,却丧失了 DPIV快速处理的优点。本文综合已有方法的优点 ,提出了一种兼有快速和精度较高的处理方法。该方法以 Willert提出的 DPIV方法为基础 ,吸收了 Huang提出的改进方法中的迭代思想 ,既保留了 DPIV快速处理的优点 ,又在一定程度上提高了测速的精度 ,非常适合于多工况和非恒定流的测量。
Digital Particle Image Velocimetry (DPIV) is a method to extract the velocity of the flow field rapidly, but the speed accuracy is low. Although the improved methods have improved the accuracy, they have lost the advantage of DPIV rapid processing. In this paper, the advantages of the existing methods are summarized, and a fast and precise processing method is proposed. Based on the DPIV method proposed by Willert, this method absorbs the iterative thinking in the improved method proposed by Huang, which not only retains the advantages of DPIV fast processing but also improves the accuracy of velocity measurement to a certain extent, which is very suitable for multi-conditions and Measurement of unsteady flow.