Experimental Study of Twin Connected Pipe Jets

S. Sourav, Ashraful Hossain Rifat, Muhammed Hasnain Kabir Nayeem, Md. Abu. Taher Ali
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Abstract

Two parallel pipe jets of 20 mm diameter were placed 1.2 mm diameter apart and were connected by a 4 mm wide channel all along the central plane of the jets. The mean velocity flow field of the jets was investigated for three Reynolds number 16300, 34400 and 49200. The Reynolds number was based on the exit velocity of the jets and jet diameter. The experiment was performed in an air jet facility and yaw meter was used for measurement of mean velocity and its direction. Their variations along the longitudinal, transverse, and lateral directions have been analyzed. A significant change of the jet flow field is observed near the exit of the jet. The combined effect of the jets diminishes the presence of recirculation region at the immediate exit rather enhances the energy and momentum transfer between their individual flow fields. Static pressure and kinetic energy distribution are also studied and a momentous variations have been noticed with varying Reynolds number.
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双连接管射流的实验研究
两个直径为20毫米的平行管射流相距1.2毫米,并沿着射流的中心平面通过一个4毫米宽的通道连接。研究了雷诺数为16300、34400和49200时射流的平均速度流场。雷诺数是根据射流的出口速度和射流直径计算的。实验在喷气设备上进行,用偏航仪测量了平均速度及其方向。分析了它们在纵向、横向和横向方向上的变化。在射流出口附近观察到射流流场的显著变化。射流的联合作用减少了直接出口再循环区域的存在,而增强了各自流场之间的能量和动量传递。对静压和动能分布也进行了研究,发现随着雷诺数的变化,静压和动能分布有很大的变化。
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