农业机械学报2011，Vol.42Issue(11)：6-9,5,5.
柴油机喷嘴内空穴流动可视化试验与数值模拟
Visualization Experiment and Numerical Simulation for Cavitating Flow in a Diesel Injector Nozzle
摘要
Abstract
A visualization unit with a proportion of the multi-hole injector nozzle for cavitating flow was developed, and by means of high-speed video camera, the pictures of the cavitating flow in a large-scale transparent nozzle were taken under various injection pressures. A three-dimensional grid model of the injector nozzles was established, and the three-dimensional numerical simulation of cavitating flow in nozzle holes of a multi-hole injector combined with these pictures from experiment was utilized to analyze flow characteristics of single-phase flow to supercavitation flow. The relationship between injection pressure, non-dimensional cavitation parameters and the discharge coefficient, as well as the critical conditions when the cavitation appeared was pointed out clearly.关键词
柴油机/喷嘴/空穴/可视化试验/数值模拟Key words
Diesel engine/Injector nozzle/Cavitating flow/Visualization experiment/Numerical simulation分类
能源科技引用本文复制引用
何志霞,柏金,王谦,黄云龙..柴油机喷嘴内空穴流动可视化试验与数值模拟[J].农业机械学报,2011,42(11):6-9,5,5.基金项目
国家自然科学基金资助项目(50806030) （50806030）
