CAJ | 학술논문

　　针对高压差下调节阀内的闪蒸空化引起的强振动和高噪声问题，设计了一种消声减振套筒，并对其级数、级间隙和孔径大小进行研究。首先从理论上确定套筒的级数和级间隙，然后建立三维模型，以连续性方程、三维雷诺平均N-S方程和基于各向同性涡粘性理论的k-ε方程组成调节阀内部流动数值模拟的控制方程组，采用结构与非结构网格相结合有限体积法对控制方程组进行离散，应用Fluent对各参数套筒结构调节阀内部流动进行数值模拟计算。结果表明，理论初步确定套筒级数的可行性；适当增大级间间隙与减小孔径大小，有利于高压差调节阀的消声减振，为高压差调节阀的设计提供参考。
　　침대고압차하조절벌내적섬증공화인기적강진동화고조성문제，설계료일충소성감진투통，병대기급수、급간극화공경대소진행연구。수선종이론상학정투통적급수화급간극，연후건립삼유모형，이련속성방정、삼유뢰낙평균N-S방정화기우각향동성와점성이론적k-ε방정조성조절벌내부류동수치모의적공제방정조，채용결구여비결구망격상결합유한체적법대공제방정조진행리산，응용Fluent대각삼수투통결구조절벌내부류동진행수치모의계산。결과표명，이론초보학정투통급수적가행성；괄당증대급간간극여감소공경대소，유리우고압차조절벌적소성감진，위고압차조절벌적설계제공삼고。
Since the control valve is subject to a intense vibration and a high level of noise caused by flashing and cavitation -when it is operated under high range of pressure condition , a sleeve used for muffling and retarding vibration was designed and its number of stages , the gap of stages , and the hole size was studied .Firstly the number of stages and the gap of stages was deter-mined theoretically , then a three-dimensional model was set up for the valve , a numerical simulation of three-dimensional , turbu-lent flow in the valve was conducted by using the Fluent based on Reynolds time -averaged N-S equations , the SIMPLEC scheme and the standard κ-εturbulence model .The results show that the number of stages determined by preliminary theory is effective , increasing the gap of stages and decreasing the hole size are beneficial to eliminate noise and reduce vibration .The article will fulfill a certain function helpful to research of the control valve under high range of pressure .