Investigation of Jet Mixing Characteristics Using Slotted Rectangular Tabs

IF 0.9 Q3 ENGINEERING, AEROSPACE Journal of Aerospace Technology and Management Pub Date : 2021-01-01 DOI:10.1590/JATM.V13.1188
A. Krishnaraj, V. Ganesan
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引用次数: 6

Abstract

This article discusses the jet mixing effectiveness of rectangular tab with slots to distort the jet, thereby creating vortices of differing sizes to enhance the mixing. This article numerically investigates the effectiveness of slanted slotted/perforated rectangular tabs with the slot connecting the adjacent faces of the tab to control Mach 0.4 jet. To intensify the jet mixing process, two similar tabs with equal blockage ratio of 7% are placed at diametrically opposite locations of the convergent nozzle exit. The jet flow development in the axial and radial directions of the jet are investigated in detail. To measure the effectiveness of the slotted tabs, the results are compared with the free jet and with the jet operated with solid rectangular tab. The percentage reduction in the core length obtained is 84.1 and 74% for the jet employed with the slotted tab and the solid tab, respectively, when compared with the free jet. The results exhibit that the slotted tab distorts the jet in the near field to a greater extent when compared with the solid rectangular tab.
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矩形开槽叶片射流混合特性研究
本文讨论了带槽的矩形叶片对射流进行扭曲,从而产生不同大小的涡流以增强混合的射流混合效果。本文用数值方法研究了斜开槽/穿孔矩形压片的控制马赫0.4射流的效果,压片的相邻面与压片的压片相连接。为了加强射流混合过程,在会聚喷嘴出口的截然相反的位置放置两个堵塞比为7%的相似片。对射流在轴向和径向上的发展进行了详细的研究。为了测量开槽卡片的有效性,将结果与自由射流和矩形实心卡片射流进行了比较。与自由射流相比,采用开槽卡箍和实心卡箍的射流所获得的芯长减少百分比分别为84.1%和74%。结果表明,与实心矩形压片相比,开槽压片对射流近场的畸变更大。
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CiteScore
2.00
自引率
0.00%
发文量
16
审稿时长
20 weeks
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