Flow field and pressure loss analysis of junction and its structure optimization of aircraft hydraulic pipe system

查看全文 作　　者：Li [1]Xin;Wang [1,2]Shaoping

机构地区：[1]School of Automation Science and Electric Engineering, Beihang University;[2]Science and Technology on Aircraft Control Laboratory, Beihang University

出　　处：《Chinese Journal of Aeronautics》索引2013年第26卷第4期,共13页

基　　金：supported by the National Natural Science Foundation of China(No.51175014) 摘　　要：The flow field in junction is complicated due to the ripple property of oil flow velocity and different frequencies of two pumps in aircraft. In this study, the flow fields of T-junction and Y-junction were analyzed using shear stress transport (SST) model in ANSYS/CFX software. The simulation results identified the variation rule of velocity peak in T-junction with different frequencies and phase-differences, meanwhile, the eddy and velocity shock existed in the corner of the T-junction, and the limit working state was obtained. Although the eddy disappeared in Y-junction, the velocity shock and pressure loss were still too big. To address these faults, an arc-junction was designed. Based on the flow fields of arc-junction, the eddy in the junction corner disappeared and the maximum of velocity peak declined compared to T-and Y-junction. Additionally, 8 series of arc-junction with different radiuses were tested to get the variation rule of velocity peak. Through the computation of the pressure loss of three junctions, the arc-junction had a lowest loss value, and its pressure loss reached the minimum value when the curvature radius is 35.42 mm, meanwhile, the velocity shock has decreased in a low phase. 关键词：压力损失交界处液压管路系统流场结构优化损失分析飞机最大速度

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Flow field and pressure loss analysis of junction and its structure optimization of aircraft hydraulic pipe system

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