Experimental investigation of the effect of cross wire on the flow field of elliptic jet |
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Affiliation: | 1. Department of Mechanical Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur 50728, Malaysia;2. Department of Aerospace Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India |
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Abstract: | The effectiveness of cross wire in controlling the mixing characteristics of a circular and an equivalent elliptic jet is investigated experimentally. While circular jets are conventional, elliptic jets have gained attention due to their better mixing characteristics and faster decay. To further explore and augment the capabilities of elliptic jets for practical utility, it is investigated whether using an elliptic jet with cross wire control gives additional benefit in terms of mixing enhancement over an axisymmetric jet. Experiments are performed for subsonic and choked flow conditions with nozzle pressure ratios ranging from to . Time-averaged pitot pressures and schlieren visualization is used for diagnosis. The jet bifurcation can be seen in controlled elliptical jets at all nozzle pressure ratios (NPRs). Core length is reduced to as much as in the elliptical jet and in the case of the circular jet. The core length values estimated from the present data are compared with the previous investigations. |
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Keywords: | Sonic nozzle Elliptical jet Circular jet Passive control Cross wire Vortices |
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