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

会聚类型的旋涡试管(vt ) 与的七调整不同扼杀角度被使用。调整被做在 vt 内在冷、热的温度落下以及流动结构上分析如此的角度的影响。试验性的安装被设计，并且测试在从 0.45 ～ 0.65 MPa 的注射压力在不同会聚的 vt 配置上被执行。throttle 阀门的角度在 30 湯愠 ? 桴 ? 潮据癯污湥 ? 湩整慲瑣潩 ? 潤潮之间被安排吗？？

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.