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为研究旋转横流中侧边射流的偏斜和扩散特性,搭建了横向射流流动显示实验台架,采用可调同步激光器和CCD摄影技术获得了不同射流速度比率时(r=15、30、45、60、75)横向射流的流场结构,基于横流槽道特征尺寸和射流速度的雷诺数Re介于22 537和112 683之间。实验结果表明,旋转横流中侧边射流的射流速度比率较大(r>30)时,射流深度基本不变,异于均匀横流中侧边射流的气流偏斜特性。另外,并非越大的射流速度比率就能获得越大的射流扩展宽度,当r=60时,系统的射流扩展宽度最大,而且在较大的射流深度区域内维持较大的扩展宽度,有利于物质的混合扩散。
In order to study the deflection and diffusion characteristics of the side jets in a rotating crossflow, a transverse jet flow display experimental bench was set up. When different jet velocity ratios were obtained by using adjustable synchronous laser and CCD photography (r = 15, 30, 45, 60,75) transverse jet. The Reynolds number Re based on the feature size and jet velocity of the cross flow channel is between 22 537 and 112 683. The experimental results show that the jet depth of the side jets in the rotating crossflow is basically the same, which is different from that of the side jets in the uniform cross flow. In addition, the larger jet expansion width can be obtained without increasing the jet velocity ratio. When r = 60, the maximum jet expansion width of the system and the larger expansion width in the larger jet depth region are favorable Mixed material diffusion.