摘要
基于OpenFOAM及动网格技术针对液压锥阀在作为调压阀工作时,由于阀芯表面受到液体冲击的作用,阀芯极易出现振荡现象,同时由于振荡导致的压力波动造成阀口空化的现象进行分析,并对于该类阀口结构如其他球阀,V型槽滑阀等在OpenFOAM中的动网格技术提出一种较为通用的网格规划以及网格扩散方式,解决在OpenFOAM中较难实现的细小狭缝平动问题。在此基础上通过阀芯的振荡幅值以及振荡周期对阀口空化的影响进行模拟分析。研究表明,对于锥阀这类附着在阀体固定壁面处的空化类型,且空化较为微弱时,阀芯的振荡对于阀口处的空化影响主要是间接的影响,其实质主要是阀口处有效过流面积改变导致的压力改变带来的影响,阀芯的振荡因素对空化的直接影响受到一定程度的削弱。
Based on OpenFOAM and dynamic grid technology,when the hydraulic poppet valve is working as a pressure regulating valve,the valve core is prone to oscillation due to the impact of liquid on the surface of the valve core,and at the same time,the valve port is cavitation due to pressure fluctuations caused by the oscillation Analyze the phenomenon,and propose a more general grid planning and grid diffusion method for this kind of valve port structure such as other ball valves,V-groove spool valves,etc.in OpenFOAM's dynamic grid technology,to solve the difficulties in OpenFOAM The realization of the small slit translation problem.On this basis,the impact of the spool's oscillation amplitude and oscillation period on the cavitation of the valve port is simulated and analyzed.Studies have shown that for cone valves such as the type of cavitation attached to the fixed wall of the valve body,and the cavitation is relatively weak,the oscillation of the valve core has an indirect effect on the cavitation at the valve port,and its essence is mainly the valve The influence of the pressure change caused by the change of the effective flow area at the port,the direct influence of the spool's oscillation factor on the cavitation is weakened to a certain extent.
作者
刘子晨
马云飞
刘乐璠
王鹰鹏
闵为
郑直
LIU Zi-chen;MA Yun-fei;LIU Yue-fan;WANG Ying-peng;MIN Wei;ZHENG Zhi(Lanzhou University of Technology,School of Energy and Power Engineering,Lanzhou 730500,China;China Nuclear Energy Industry Corporation,Beijing 100032,China)
出处
《液压气动与密封》
2022年第7期24-29,共6页
Hydraulics Pneumatics & Seals
基金
国家自然科学基金(51465033,51565027)。
