平展流冷态湍流场的PIV测量

PIV measurement of cold turbulent flow field on open and flat flow

针对单烧嘴湍流预混平焰冷态实验模型,采用粒子激光测速(PIV)技术对烧嘴下方主要燃烧区的速度场(250mm×350mm)进行了测量,得出在旋流强度为1.76,空气量/煤气量为19.39下的速度场。速度场由回流区、附壁射流区和过渡区组成,同时进一步分析了三个区域内径向速度和轴向速度的变化规律。

In allusion to flat- flame turbulent cold model of a tingle premixing burner, central combustion velocity field （250 × 350） under the burner is measured adopting Partide Image Velocity （PIV） technology. The velocity field is obtained on condition that whirl sttength is 1.76 and the ratio air to gas is 19.39. The field is composed of back flow region, joint jet region and transitional region. At the same time, this paper analyzes the distributing rules of radial velocity and axial velocity in the three regions.