Mixing in Turbulent Free Jets Issuing from Isosceles Triangular Ori- fices with Different Apex Angles
This paper reports the results of an experimental investigation on mixing in turbulent free jets issuing from isosceles triangular orifices with apex angles of 10℃ , 20℃ and 30℃ . The results obtained in a contoured nozzle round jet are also presented for comparison. The measurements were made with an x-array hot-wire probe and a pitot-static tube in isothermal, incompressible jets issuing from the orifices into still surrounding air. The Reynolds number, based on the equivalent diameter of the triangular orifices (the same as the diameter of the contoured round nozzle), was on average 1.93×105 in all the jets. The results for the mean streamwise centerline velocity decay and jet entrainment suggest that the 10.C jet has the highest mixing rate and that the contoured nozzle round jet has the lowest mixing rate among all the jets tested.
turbulence mixing triangular orifice jet
M. Azad W. R. Quinn D. Groulx
Department of Mechanical Engineering, Dalhousie University, Halifax, NS, B3J 2X4, Canada Department of Engineering, St. Francis Xavier University, Antigonish, NS, B2G 2W5, Canada
国际会议
广州
英文
539-542
2011-06-30（万方平台首次上网日期，不代表论文的发表时间）