转套式配流系统内部流场空化现象研究与分析  

Study and Analysis of Cavitation on Inner Flow Field of Rotating-Sleeve Distributing-Flow System

作　　者：张延君[1] 张洪信[1] 赵清海[2] 王新亮[1] 程前昌 

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]青岛大学动力集成及储能系统工程技术中心,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2017年第4期72-75,共4页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金资助项目(51575286);山东省自然科学基金资助项目(2014ZRB01503)

摘　　要：针对转套式配流系统工作时流场内部局部压力降低,产生低压区以及出现低于绝对零压的现象,本文利用空化模型模拟流体的压力分布,并分析了空化对系统的影响。同时,对空化产生的机理与模型进行分析,根据转套式配流系统的结构特征建立流体模型,根据仿真要求对配流系统流体域进行参数设置,并在仿真过程加入空化模型,设置流体饱和蒸汽压。仿真结果表明,配流系统工作过程中在高压区向低压区的过渡位置出现了空化现象,气泡被带入低压区,对配流系统元件的气蚀现象不明显,但会降低容积效率,说明空化对配流系统造成一定影响。该研究对进一步研究容积效率指明了方向。The local loss of pressure can lead to low-pressure area and phenomenon that fluid field pressure is lower than absolute zero-pressure during working of rotating-sleeve distributing-flow system. Therefore cavita-tion model is utilized to simulate pressure distribution and analyze the relationship between pressure and cavita-tion. First of all, mechanism of production on cavitation is obtained in this paper and fluid model is also estab-lished in sight of distributing-flow system’s structural feature. Besides, parameters of various characteristics including cavitation model and saturated vapor pressure of fluid are completely set in simulation model. The re-sults show that there happened cavitation in the moment when fluid transited from high pressure to low pres-sure ,and bubbles were taken into low pressure area so that cavitation could not largely influence components of distributing-flow system, but it can reduce volume efficiency. It is illustrated that cavitation has noticeable effects on rotating-sleeve distributing-flow system and research on volume efficiency is pointed out the direc-tion.

关 键 词：转套式配流系统 空化现象 空化模型 数值仿真 

分 类 号：TH137.5[机械工程—机械制造及自动化]