離心式水幫浦流場分析

• Main Authors: Yu-Cheng Lin, 林育正
• Other Authors: Tongdar Tang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/90835423124816628827

碩士 === 華梵大學 === 機電工程學系博碩專班 === 99 === This study investigates the velocity and pressure distributions of a centrifugal pump under different rotating speeds of 1800 rpm, 2400 rpm, 3000 rpm, 3600 rpm, 4200 rpm and 4800 rpm. Finite volume method code, STAR-CD, is used to study the flow phenomena. High Reynolds number of k-ε turbulence model is applied. Multiple-rotating coordinate system and steady interaction technique are employed. The pump’s outer diameter is 140 mm and impeller’s diameter is 100 mm. The diameter of the pump inlet is 25.4 mm. The results show that the pressure and flow velocity are higher if the rotating speed is higher. According to the velocity distributions, potential cavitation occurs at speeds above 3600 rpm. In the volute channel, a vortex appears and the fluid flows back to the rotating blade channel. Calculations from the results of velocity and pressure data show that the pressure head and flow rate are also higher if the rotating speed is higher.