Three-dimensional flow field mathematical model inside the pilot stage of the deflector jet servo valve  

作　　者：Shuang-lu LI Yao-bao YIN Jiang-yang YUAN Sheng-rong GUO 

机构地区：[1]School of Mechanical Engineering,Tongji University,Shanghai 201804,China [2]Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration,Aviation Industry Corporation of China,Nanjing 210061,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2022年第10期795-806,共12页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51775383 and 52175059)。

摘　　要：A new flow field mathematical model is proposed to describe accurately the flow field structure and calculate the static characteristics of the pilot stage in a deflector jet servo valve(DJSV). The flow field is divided into five regions, a 3D turbulent jet is adopted to describe the free jet region, and a velocity distribution expression of the jet is proposed. The jet entrainment model is put forward in the pressure recovery region to describe the coupling relationship between the pressure in the receiving chamber and the jet flow. The static characteristics, including pressure-flow characteristics, pressure characteristics,and flow characteristics of the pilot stage are obtained. The flow field structure and the static characteristics are verified by finite element analysis(FEA) and experiment, respectively, and the mathematical model results are in good agreement with the experimental and simulation results.

关 键 词：Deflector jet servo valve(DJSV) Pilot stage Three-dimensional jets Jets entrainment Static characteristics Mathematical model 

分 类 号：TH137.52[机械工程—机械制造及自动化]