Experimental Study of Coaxial Jets Mixing Enhancement Using Synthetic Jets
Experimental Study of Coaxial Jets Mixing Enhancement Using Synthetic Jets
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DOI：
10.3390/app11020803
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
Binglong Zhang;He Liu;Yangyang Li;Hui Liu;Jinzhong Dong
中科院分区：
文献类型：
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作者：
Binglong Zhang;He Liu;Yangyang Li;Hui Liu;Jinzhong Dong
本文采用垂直于主流方向的合成射流对同轴射流增强混合进行了实验研究。利用粒子图像测速仪（PIV）和热线风速仪测量了同轴射流的涡量、流向速度、径向速度、雷诺切应力和湍流强度等参数。得到了有无合成射流时这些参数的分布特征。通过对实验结果的分析，总结了合成射流增强同轴射流混合的机理，发现动量系数是影响射流混合的最关键因素。对比实验充分验证了这一机理，表明在合适的动量系数下，合成射流能显著增强同轴射流的混合。
Synthetic jets perpendicular to the mainstream have been used to experimentally study the coaxial jets mixing enhancement in this paper. The parameters of coaxial jets such as vorticity, streamwise velocity, radial velocity, Reynolds shear stress, and turbulence intensity are measured using the particle image velocimetry (PIV) and hot wire anemometers. The distribution characteristics of these parameters with and without synthetic jets were obtained. The mechanism of coaxial jets mixing enhancement using synthetic jets was summarized by analyzing these experimental results, and it was also found that the momentum coefficient was the most critical factor for jets mixing enhancement. The comparative experiments fully verified the mechanism, showing that with an appropriate momentum coefficient, the synthetic jets significantly enhanced coaxial jets mixing.