船用三通调节阀不同压力下流量特性修正研究  

Research on correction of flow characteristics of marine three-way regulating valve under different pressure conditions

作　　者：周爱民[1] 施红旗[1] 姜国宝 周旭 李树勋[2] ZHOU Ai-min;SHI Hong-qi;JIANG Guo-bao;ZHOU Xu;LI Shu-xun(Wuhan Second Ship Design and Research Institute,Wuhan 430205,China;School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430205 [2]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《舰船科学技术》2023年第11期65-71,共7页Ship Science and Technology

摘　　要：以PN50 DN250三通调节阀为研究对象,针对三通调节阀主旁通回路高压实际工况流量系数缺乏数值模拟研究及试验条件的问题,提出一种修正低压试验工况流量系数得到高压实际工况流量系数的方法。利用CFD计算流体力学方法模拟研究低压工况与高压工况下三通调节阀在10%~100%共10组典型开度下主控制回路和旁通回路流动特性,计算对应流量系数Kv,根据提出的高低压工况流量系数修正转化关系,对低压试验工况下的试验流量系数进行修正,得到高压实际工况流量系数,并通过试验加以验证。结果表明,修正后的高压工况流量系数曲线与试验流量系数曲线趋势一致,且修正后的流量系数与试验平均误差在2.35%以内,证明了该修正方法具有良好的精度,可用于高压实际工况下流量系数的预测。To solve the problem of lack of numerical simulation research and test conditions for the flow coefficient of the main bypass circuit of the three-way regulating valve under the high pressure actual working conditions,taking the PN50 DN250 three-way regulating valve as the research object,a method to modify the flow coefficient under low-pressure test conditions to obtain the flow coefficient under high-pressure actual working conditions is proposed.CFD computational fluid dynamics method is used to simulate and study the flow characteristics of the main control circuit and bypass circuit of the three-way regulating valve under low-pressure and high-pressure conditions under 10%~100%ten groups of typical opening,calculate the corresponding flow coefficient ky,and correct the test flow coefficient under low-pressure test conditions according to the proposed correction conversion relationship of flow coefficient under high-pressure and low-pressure conditions,so as to obtain the flow coefficient under high-pressure actual conditions,which is confirmed by experiments.The results show that the trend of the corrected flow coefficient curve under high pressure condition is consistent with the test flow coefficient curve,and the average error between the corrected flow coefficient and the test is less than 2.35%,which proves that the correction method has good accuracy and can be used to predict the flow coefficient under high pressure actual condition.

关 键 词：调节阀 流量特性 数值模拟 台架试验 系数修正 

分 类 号：TH134[机械工程—机械制造及自动化]