蝶形放气活门敏感间隙污染颗粒侵入及优化  

Invasion and Optimization of Pollution Particles in Sensitive Clearance of Butterfly Bleed Valve

作　　者：惠锡铭 王欢 尹文龙 杜冉恒 潘利江 张晋[2,3] HUI Ximing;WANG Huan;YIN Wenlong;DU Ranheng;PAN Lijiang;ZHANG Jin(AVIC Changchun Control Technology,Changchun,Jilin 130102;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004;Hebei Provincial Key Laboratory of Heavy Fluid Power Transmission and Control,Qinhuangdao,Hebei 066004)

机构地区：[1]中国航发长春控制科技有限公司,吉林长春130102 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]河北省重型机械流体动力传输实验室,河北秦皇岛066004

出　　处：《液压与气动》2025年第3期34-42,共9页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52275068)。

摘　　要：蝶形放气活门常用于释放轴流压气机出口部分空气以防止发动机喘振。在飞行器使用过程中,空气中污染颗粒可能侵入活门关键间隙,导致阻力矩增加,甚至引发机械卡死。基于活门工作原理及使用环境,采用计算流体力学分析活门不同工况下的流场状态。依据流场条件及颗粒属性,应用计算流体力学-离散元法得到颗粒在活门中的运动轨迹和间隙侵入规律。结果表明:随着温度的提升,进口质量流量逐渐降低,进口速度逐渐提升;全关工况下的污染颗粒从蝶板两侧间隙射出,全开工况下的颗粒从主通道流出;小直径、低密度的污染颗粒在活门流场中有较好的跟随性。提出一种抗污染隔环,用以阻碍颗粒污染物侵入敏感间隙,为放气活门抗污染性能提升及结构优化提供理论基础。The butterfly bleed valve is widely used to release part of the air from the outlet of an axial flow compressor,preventing engine surge.During aircraft operation,particulate contaminants in the air may infiltrate critical valve clearances,leading to increased torque resistance and mechanical seizure.Based on the valve's working principles and operational environment,computational fluid dynamics(CFD)is applied to evaluate the flow field under various conditions.According to the flow field conditions and particle properties,this study uses CFD combined with the discrete element method(DEM)to analyze,particle trajectories and clearance intrusion behaviors within the valve.The results indicate that as temperature increases,the inlet mass flow rate gradually decreases,while the inlet velocity rises.In fully closed condition,contaminant particles are expelled through the clearances on both sides of the valve plate,while in fully open condition,particles are discharged through the main channel.Additionally,smaller diameter and lower density particles exhibit better following behavior in the valve's flow field.An anti-contamination spacer ring design is proposed to prevent particle contaminants from invading sensitive gaps,providing a theoretical basis for improving the anti-contamination performance and structural optimization of the butterfly bleed valve.

关 键 词：蝶形放气活门 CFD-DPM 敏感间隙 颗粒侵入 

分 类 号：TH138[机械工程—机械制造及自动化] V228.73[航空宇航科学与技术—飞行器设计]