Experimental Study and 3D CFD Analysis on the Optimization of Throttle Angle for a Convergent Vortex Tube  

作　　者：Seyed Ehsan Rafiee M.M.Sadeghiazad 

机构地区：[1]Department of Mechanical Engineering, Urmia University of Technology, Urmia P. O. Box 57155- 419,1-ran

出　　处：《Journal of Marine Science and Application》2016年第4期388-404,共17页船舶与海洋工程学报（英文版）

摘　　要：Seven adjustments of convergent-type Vortex Tube （VT） with different throttle angles were applied. The adjustments were made to analyze the influences of such angles on cold and hot temperature drops as well as flow structures inside the VTs. An experimental setup was designed, and tests were performed on different convergent VT configurations at injection pressures ranging from 0.45 to 0.65 MPa. The angles of the throttle valve were arranged between 30° to 90°, and the numbers of injection nozzles ranged between 2 and 6. Laboratory results indicated that the maximum hot and cold temperature drops ranged from 23.24 to 35 K and from 22.87 to 32.88 K, respectively, at four injection nozzles. Results also showed that temperature drop is a function of hot throttle valve angle with the maximum hot and cold temperature drops depending on the angle applied. We used graphs to demonstrate the changes in the cold and hot temperature drops with respect to hot throttle angle values. These values were interpreted and evaluated to determine the optimum angle, which was 60°. The CFD outputs agreed very well with the laboratory results. The proposed CFD results can help future researchers gain good insights into the complicated separation process taking place inside the VTs.

关 键 词：convergent vortex tube throttle valve CFD conical valve angle injection pressure slots number OPTIMIZATION 

分 类 号：U[交通运输工程]