排灌机械工程学报2018，Vol.36Issue(3)：197-203,7.DOI:10.3969/j.issn.1674-8530.17.0007
粗糙度对离心泵空化过程的影响
Impact of wall roughness on cavitating process in centrifugal pumps
摘要
Abstract
To study the effect of wall roughness on cavitating process in centrifugal pumps,the steady internal flow in a centrifugal pump was simulated numerically by using ANSYS CFX.The fluid domains of the pump were generated by using Pro/E software.The RNG k-ε turbulence model and Zwart's cavitation model,which doesn't consider non-condensable gas in water,were applied in simulations.The numerical simulations of flow in the pump were conducted under design flow condition.Then the influences of wall roughness on cavitation characteristic and internal flow pattern were analyzed by changing the wall roughness of the blades.The results show that an increased roughness leads to a decline in the pump head and efficiency but an increase in the shaft power.The degree of influence of roughness on the pump performance in the critical and local cavitation states is more significant than that under the subcritical and supercritical cavitation conditions.The effect of roughness on turbulent kinetic energy in the pump is sitnilar to the influence on the development of cavitation.A reduced wall roughness has a significant effect on the improvement of centrifugal pump characteristics,when the inlet pressure is 81.06 kPa and 101.33 kPa.关键词
离心泵/壁面粗糙度/空化/数值模拟Key words
centrifugal pump/wall roughness/cavitation/numerical simulation分类
农业科技引用本文复制引用
徐维晖,侯晓,胡孟,何小可,王为术..粗糙度对离心泵空化过程的影响[J].排灌机械工程学报,2018,36(3):197-203,7.基金项目
河南省高校科技创新团队支持计划项目(16IRTSTHN017) （16IRTSTHN017）
青海省重大科技计划项目(2016-NK-132) （2016-NK-132）
