Restricted accessResearch articleFirst published online 2024-12
Mathematical modeling and experimental investigation of pressure characteristics inside the pilot stage of the deflector jet servo valve considering secondary jet velocity distribution
Existing mathematical models for deflector jet hydraulic amplifiers cannot accurately describe the influence of the deflector motion on the receiver jet, which results in calculation differences for the receiver pressure. To deeply investigate this problem, the momentum transfer model considering secondary jet velocity distribution was used to develop an improved model that is more aligned with the actual state of the flow field. In this model, the receiver jet velocity is calculated, for the first time, with a maximum error of 18% when compared with existing models. To verify the improved model, the recovery pressures in the receivers were verified by numerical simulations and experiments. The verification results show that the model can accurately predict the recovery pressures in the receivers within an 8.1% maximum error. This model fills the gaps in the theoretical research and lays a foundation for the structural design of deflector jet pressure servo valves.
YinQNieHWeiX,et al.Aircraft electric anti-skid braking and combined direction control system using co-simulation and experimental methods. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2020; 234(2): 173–191.
2.
LiangTYinQWeiX. Straight-line path-following control for roll-out phase of the equipped-skid aircraft. In: Proceedings of the institution of mechanical engineers Part G: journal of aerospace engineering, 2022; 236(10): 2097–2107.
3.
TianYD. Technology of electrohydraulic servovalves. Beijing: Aviation Industry Press, 2008.
4.
WangCX. Hydraulic control systems. Beijing: China Machine Press, 2011.
5.
SomashekharSHSingaperumalMKumarRK. Mathematical modelling and simulation of a jet pipe electrohydraulic flow control servo valve. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering2007; 221(3): 365–382.
6.
SomashekharSHSingaperumalMKumarRK. Modelling the steady state analysis of a jet pipe electrohydraulic servo valve. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering2006; 220(2): 109–129.
7.
PhamXHSYinYB. Research on fluid characteristics of jet pipe electro-hydraulic servo-valve based on structural parameters. In: Intelligent Human-Machine Systems and Cybernetics, Hangzhou, China, 24-25 August, 2024. 2012; 310-313.
8.
YinYBWangY. Pressure characterization of the pre-stage of jet-pipe servo valve. Journal of Aerospace Power2015; 30(12): 3058–3063.
9.
AbdallahHKPengJLiS. Analysis of pressure oscillation and structural parameters on the performance of deflector jet servo valve. Alexandria Engineering Journal. 2023(63):675–692.
10.
SahaBKPengJLiS. Numerical and experimental investigations of cavitation phenomena inside the pilot stage of the deflector jet servo-valve. IEEE Access. 2020(8):64238–64249.
11.
LiJYanHRenYK,et al.Research on Flow Field in Pre-stage of Jet Deflector Servo Valve. Acta Armamentarii2018; 39(5): 1012–1021.
12.
XingX. Flow field modeling and structural parameter optimization of pre-stage of de-flector servo valve. Wuhan, China: Wuhan university of science and technology, 2018.
13.
ZhuYCLiYS. Development of a deflector-jet electrohydraulic servovalve using a giant magnetostrictive material. Smart Mater Struct2014; 23: 115001.
14.
LiYSZhuYCWuHT. Parameter optimization of jet-pipe servovalve driven by giant magnetostrictive actuator. Acta Aeronautica Astronautica Sinica2011; 32: 1336–1344.
15.
LiYS. Mathematical modelling and characteristics of the pilot valve applied to a jet-pipe/deflector-jet servovalve. Sensor Actuator A2016; 245: 150–159.
16.
LiYS. Mathematical modeling and linearized analysis of the jet-pipe hydraulic amplifier applied to a servovalve. Proceedings of the Institution of Mechanical Engineers, 2019; 233(2): 657–666.
17.
WangCLDingFLiQP,et al.Dynamic characteristics of electro-hydraulic position system controlled by jet-pan servovalve. Journal of Chongqing University2003; 26(11): 11–15.
18.
KangSYanHLiCC,et al.Modeling of the flow distribution and characteristics analysis of the pilot stage in a deflector jet servo valve. Journal of Harbin Engineering University2017; 38(8): 1293–1302.
19.
YanHRenYYaoL,et al.Analysis of the internal characteristics of a deflector jet servo valve. Chinese Journal of Mechanical Engineering. 2019(32):1–13.
20.
SahaBKLiSJLvXB. Analysis of pressure characteristics under laminar and turbulent flow states inside the pilot stage of a deflection flapper servo-valve: mathematical modeling with CFD study and experimental validation. Chinese Journal of Aeronautics . 2020 Mar 1;33(3):1107–1118.
21.
MaoQYYanHZuoZQ,et al.Study on the formation mechanism of working pressure of deflecting jet servo valve. Chinese Hydraulics & Pneumatics. 2020(10):33–38.
22.
ZhangXBGeSHZhouXZ,et al.Effect of asymmetry on null bias of deflector jet amplifier. J Valve. 2024(2): 154–161.
23.
YanHBaiLKangS,et al.Theoretical model and characteristics analysis of deflector-jet servo valves pilot stage. Journal of Vibroengineering2017; 19(6): 4655–4670.
24.
YanHWangFJLiCC,et al.Research on the jet characteristics of the deflector-jet mechanism of the servo valve. Chinese Physics B2017; 26(4): 252–260.
25.
FörthmannE. Über turbulente Strahlausbreitung. Ing Arch1934; 5(1): 42–54.
26.
AbramovichGN. The theory of turbulent jets. In: Massachuetts. Cambridge, Massachusetts: M.I.T. Press, 1963.
