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利用自由剪切湍流中的圆管射流所具有的流动特性，采用相位多普勒粒子分析仪（ＰｈａｓｅＤｏｐｐｌｅｒＰａｒｔｉｃｌｅＡｎａｌｙｚｅｒ）对射流随轴向发展的最大速度进行了７次重复性测量试验，给出非侵入测量射流的势流区和湍流自模拟区的测量精度。文中还进行了热线与ＰＤＰＡ对射流最大速度随轴向衰减变化的测量试验，给出了ＰＤＰＡ与ＨＷ测量结果之间的关系曲线和公式。同时给出了侵入测量中探头对流场中当地速度的干扰影响量。
Using the flow characteristics of a circular tube jet in a free-shear turbulent flow, a maximum of 7 repeatability measurements of the maximum axial velocity of the jet were carried out using a Phase Doppler Particle Analyzer. Non-invasive measurements Jet flow potential area and turbulence from the simulation area measurement accuracy. In the paper, hotline and PDPA are also used to measure the maximum jet velocity change with axial attenuation. The relation curves and formulas between PDPA and HW measurement results are given. At the same time, the interference influence of the probe to the local velocity in the flow field is given.