速度场和压力场耦合测量的三脉冲层析PIV测量系统研究

随着层析粒子图像测速技术（PIV）的发展，PIV体测量时空分辨率有了大幅提高，这为三维压力场重构提供了技术支持。由于采用高速激光和高速相机的层析PIV技术在激光能量和成像质量上存在的不足，人们提出了三脉冲PIV理念，旨在通过高能低速的PIV设备实现流场加速度场的计算从而还原流场压力场。本课题将开展三脉冲层析PIV实验技术的研究，通过层析PIV技术来实现三维流动速度场和压力场的耦合测量，为实验研究复杂的三维流动提供高精度、高分辨率的实验测量技术。项目将在实验设备研发、层析PIV数据处理算法和压力重构算法优化三方面展开研究，最终实现完全具有自主知识产权的三脉冲层析PIV测量系统的研制。

As rapid development of tomographic particle image velocimetry (PIV) in volumetric PIV measurements, high temporal and spatial resolutions become achievable in experimental measurements, which make PIV-based pressure reconstruction possible. Due to poor performances of high speed laser and camera system regarding low power and signal to noise ratio, a concept of triple-pulse PIV was recently proposed, which aims to reconstruct a pressure field from a low-frequency PIV with high laser power. The goal of this project is to investigate a technique of triple-pulse tomographic PIV to measure a velocity-pressure field with high accuracy, which would benefit experimental study on complex and turbulent flows. Data processing algorithms of tomographic PIV and pressure reconstruction will be optimized. Finally, a system of triple-pulse tomographic PIV with intellectual property rights will be developed.