高压差流量调节阀流道低噪声优化设计

摘要

In view of the prominent problem of throttling noise in the flow regulating valve of marine seawater system, the CFD method was adopted to simulate the flow field inside the flow regulating valve under high pressure differential con-dition. Based on the calculation results of regulating valve inner flow passage flow field, the mechanism and cause of the flow noise of were analyzed. According to the cause of the regulating valve, combined with the basic theory of low-noise design of the valves, combined with the basic theory of low-noise design of the valve, the flow-path of the regulating valve was optimized. The flow field calculation results of optimized flow-path show that the low pressure area is reduced .The vor-tex inside flow channel is eliminated, so that the flow noise is restrain. The research provides guidance for low-noise optim-ized design of regulating valves.%针对船舶海水系统流量调节阀节流噪声突出的问题,采用计算流体力学的方法对流量调节阀在大压差工况下的内部流场分布进行仿真计算.基于原调节阀内流道流场计算结果,对调节阀流噪声产生的机理和原因进行分析.根据流量调节阀噪声产生原因,结合阀门低噪声设计的基本理论,对流量调节阀的内流道进行优化设计.对优化流道的流场计算结果表明,优化后的流量调节阀最高流速有效降低,阀后低压区面积减小,分割流道设计使阀芯内漩涡消除,阀后漩涡强度减弱,从根本上降低阀门流噪声,为流量调节阀的低噪声优化设计提供指导性建议.