Structural parameters of liquid jet pump
1.1 jet pump structure. Jet pump structural parameters include area ratio m, throat l2, throat length l4, roar pipe import angle α1 and diffusion angle α2 five factors. Where m = F2 / F1 = (d2 / d1) 2 By describing the performance of the liquid jet pump and the following three parameters to express: Flow ratio q = Qb / Qa The head ratio h = [(HcZc + Vc2 / 2g) - (Hb + Zb + Vb2 / 2g)] / [(Ha + Za + Va2 / 2g) - (Hb + Zb + Vb2 / 2g)] Efficiency value η = qh / (1-h) 1.2 jet pump structure parameters of its performance According to a large number of domestic and foreign scholars, when the range of values ​​is: m = 2-9, l2 = 1-6d0, l4 = 4-9d2, α1 = 150-1200, α2 = 0-140, v0 <50m / s When the result of its performance. From this it can be seen that each structural parameter has the following effect on its performance: (1) The area ratio is the main parameter affecting the jet pump, m = 3-4 is the high efficiency area. (2) throat distance l2 = 1.0d0, the jet pump has a high efficiency point. (3) Diffusion angle also has a greater impact on jet pump performance, when 40 <α2 <100 for the jet pump high-efficiency zone. (4) The inlet angle of the throat has less effect on its performance. (5) The length of the throat has a great influence on its efficiency, and its effective area is 6d4 <14 <8d2. Because the experimental results with the boundary conditions selected range of different values ​​vary, so the various factors on the performance of the jet pump ability to change. 90 Degree Angle Head,90° Angle Head,Side Milling Head,Milling head 90 degrees Kunshan Hongyi Tengda Mold Hardware Co.,Ltd , https://www.hdchecking.com