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结构参数对LNG潜液泵诱导轮性能影响的数值分析

发表时间:2017-07-31  浏览量:194  下载量:28
全部作者: 匡海云,张师帅,智博文,王钰
作者单位: 华中科技大学能源与动力工程学院
摘 要: 利用ANSYS CFX软件,同时采用SST湍流模型和Rayleigh-Plesset汽蚀模型,对不同修圆半径和不同叶顶间隙的液化天然气(liquid nature gas,LNG)潜液泵诱导轮进行数值分析,分别研究两种结构参数对诱导轮水力性能和汽蚀性能的影响规律。结果表明,随着修圆半径的增加,诱导轮出口静压降低,吸力面气泡体积分数减小,使得诱导轮水力性能下降,汽蚀性能增强;随着叶顶间隙的增加,诱导轮出口静压降低,吸力面气泡体积分数增大,使得诱导轮水力性能下降,汽蚀性能减弱。研究结果可为LNG潜液泵诱导轮的设计和结构优化提供理论依据。
关 键 词: 流动机械工程及流体动力工程;诱导轮;水力性能;汽蚀性能
Title: Numerical simulation for effects of structural parameters on the performance of LNG submersible pump inducer
Author: KUANG Haiyun, ZHANG Shishuai, ZHI Bowen, WANG Yu
Organization: School of Energy and Power Engineering, Huazhong University of Science & Technology
Abstract: Numerical simulation has been done for liguid nature gas (LNG) submersible pump inducer with different trimming circle radiuses and tip clearances by ANSYS CFX software as well as SST turbulence model and Rayleigh-Plesset cavitation model. Respectively, influence laws of two structural parameters on hydraulic performance and cavitation performance were studied. The results show that with the increase of trimming circle radius, static pressure at the outlet of inducer decreases and bubble volume fraction on suction surface reduces, which leads to degradation of hydraulic performance and enhancement of cavitation performance. With the increase of tip clearance, static pressure at outlet of inducer decreases and bubble volume fraction on suction surface increases, which leads to degradations of hydraulic performance and cavitation performance. The results provide the theoretical basis for design and structural optimization of LNG submersible pump inducer.
Key words: fflow mechanical engineering and fluid power engineering; inducer; hydraulic performance; cavitation performance
发表期数: 2017年7月第14期
引用格式: 匡海云,张师帅,智博文,等. 结构参数对LNG潜液泵诱导轮性能影响的数值分析[J]. 中国科技论文在线精品论文,2017,10(14):1571-1579.
 
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