TY - GEN
T1 - A numerical study of flow field in a flapper-nozzle pilot valve with a moving flapper
AU - Lv, Xinbei
AU - Li, Songjing
AU - Zhang, Shengzhuo
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/11/17
Y1 - 2016/11/17
N2 - As we known that the flapper-nozzle pilot stage is a very vital part in converting the electric signals into hydraulic outputs between the torque motor and main spool in the electro-hydraulic servo-valve. The performance of the flapper-nozzle has a seriously impact on the capability of the entire system. This paper has presented the flow field characteristics in the pilot valve when the flapper is moving, which will reflect the real working conditions. The initial speed is imposed on the flapper which will insure it moving in a way of 2 DOF (Degree of Freedom). Meanwhile, for the reason of saving computational time-consuming, the flapper is substituted by a part of the standard servo-valve. During the simulation, the strategy of overset mesh is utilized to update the moving mesh. Then the simulation results are firstly compared with the experiment result. The results show that the numerical method used in this paper is able to predict the flow field of the flapper-nozzle pilot valve when the flapper is moving. Finally, the translation of the flapper, transient velocity field and the distribution of vorticity are presented. The results also show that the movement of the flapper can make the flow field be a disciplinary and dissymmetry one, the vorticity of the flow field is also more complex but periodicity.
AB - As we known that the flapper-nozzle pilot stage is a very vital part in converting the electric signals into hydraulic outputs between the torque motor and main spool in the electro-hydraulic servo-valve. The performance of the flapper-nozzle has a seriously impact on the capability of the entire system. This paper has presented the flow field characteristics in the pilot valve when the flapper is moving, which will reflect the real working conditions. The initial speed is imposed on the flapper which will insure it moving in a way of 2 DOF (Degree of Freedom). Meanwhile, for the reason of saving computational time-consuming, the flapper is substituted by a part of the standard servo-valve. During the simulation, the strategy of overset mesh is utilized to update the moving mesh. Then the simulation results are firstly compared with the experiment result. The results show that the numerical method used in this paper is able to predict the flow field of the flapper-nozzle pilot valve when the flapper is moving. Finally, the translation of the flapper, transient velocity field and the distribution of vorticity are presented. The results also show that the movement of the flapper can make the flow field be a disciplinary and dissymmetry one, the vorticity of the flow field is also more complex but periodicity.
KW - flapper-nozzle valve
KW - flow field distribution
KW - moving flapper
KW - overset mesh
UR - https://www.scopus.com/pages/publications/85006699130
U2 - 10.1109/AUS.2016.7748127
DO - 10.1109/AUS.2016.7748127
M3 - 会议稿件
AN - SCOPUS:85006699130
T3 - AUS 2016 - 2016 IEEE/CSAA International Conference on Aircraft Utility Systems
SP - 626
EP - 629
BT - AUS 2016 - 2016 IEEE/CSAA International Conference on Aircraft Utility Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE/CSAA International Conference on Aircraft Utility Systems, AUS 2016
Y2 - 10 October 2016 through 12 October 2016
ER -