哈尔滨工程大学学报2016，Vol.37Issue(5)：678-683,6.DOI:10.11990/jheu.201503023
修正湍流粘度的混流泵空化非定常分析
Transient cavitation analysis of a mixed-flow pump by modifying turbulent viscosity
摘要
Abstract
To reduce errors in the numerical simulation of cavitation in a mixed⁃flow pump and to analyze the char⁃acteristics of pressure fluctuations, the cavitation performance of a mixed⁃flow pump was numerically simulated u⁃sing a Zwart⁃Gerber⁃Belamri cavitation model. The influence of the SST and RNG turbulence models on the numeri⁃cal simulation of cavitation in the mixed⁃flow pump was analyzed. The cavitation performance of the pump was nu⁃merically calculated by steady and transient methods with an RNG turbulence model with modified turbulent viscosi⁃ty . The results demonstrate that the error of the RNG turbulence model is less than that of the SST turbulence model in numerical simulations of both non⁃cavitation and cavitation conditions. By modifying the turbulent viscosity in the RNG turbulence model, the error of the RNG model is further reduced. By monitoring and analyzing pressure fluc⁃tuations at the rotor inlet, rotor outlet, and pump outlet, it was discovered that the pressure at the rotor inlet is min⁃imal but it significantly fluctuates. The dominant frequency of the pressure fluctuation at all monitoring points is the rotor⁃blade frequency, and the amplitude of the dominant frequency increases with a reduction in the net positive suction head at the pump inlet.关键词
混流泵/空化/非定常数值模拟/湍流模型/湍流粘度Key words
mixed-flow pump/cavitation/transient numerical simulation/turbulence model/turbulent viscosity分类
交通工程引用本文复制引用
曹玉良,贺国,明廷锋,丁江明,苏永生..修正湍流粘度的混流泵空化非定常分析[J].哈尔滨工程大学学报,2016,37(5):678-683,6.基金项目
自然科学基金青年基金资助项目（51306205）；湖北省自然科学基金资助项目（2015CFB700）． （）
