液压与气动2025，Vol.49Issue(3)：34-42,9.DOI:10.11832/j.issn.1000-4858.2025.03.005
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
摘要
Abstract
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Key words
butterfly bleed valve/CFD-DPM/sensitive clearance/particle invasion分类
机械工程引用本文复制引用
惠锡铭,王欢,尹文龙,杜冉恒,潘利江,张晋..蝶形放气活门敏感间隙污染颗粒侵入及优化[J].液压与气动,2025,49(3):34-42,9.基金项目
国家自然科学基金(52275068) （52275068）
