Characteristics of cavitation and pressure fluctuation of a two-dimensional valve based on FLUENT simulation

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (18) : 228-235.

ZHAO Yonghua1,2, RUAN Jian1, DING Chuan1, GAO Feng2

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Abstract

The pilot stage and the power stage are integrated into one spool, which is easy to realize the fast operation and high frequency response of the valve. It has the advantages of simple structure, stable performance and high power to weight ratio. The cavitation caused by the pilot orifice is an important cause of pressure pulsation, vibration and noise. Through numerical calculation, the cavitation characteristics and pressure pulsation of the flow field in an opening and closing period of the valve port are analyzed. It can be seen that in the flow field of the pilot stage of the two-dimensional valve, the chute area of the valve sleeve downstream of the throttle port is the main area where cavitation occurs. The maximum speed of the throttle port on the closed side (108m/s) is higher than the maximum speed of the throttle port on the open side (97.8m/s), and the high speed duration is 0.2s longer. The cavitation degree of valve opening is serious, and the cavitation area of valve closing is large. The cavitation of the flow field in the pilot stage of the two-dimensional valve will cause pressure pulsation. The pressure pulsation near the wall is concentrated within 50Hz, and the pressure pulsation in the chute of the valve sleeve shows the characteristics of broadband.
Key words: two-dimensional valve; numerical simulation; cavitation characteristics; pressure pulsation

Key words

two-dimensional valve / numerical simulation / cavitation characteristics / pressure pulsation

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ZHAO Yonghua1,2, RUAN Jian1, DING Chuan1, GAO Feng2. Characteristics of cavitation and pressure fluctuation of a two-dimensional valve based on FLUENT simulation[J]. Journal of Vibration and Shock, 2022, 41(18): 228-235

References

[1]陆倩倩，阮健，李胜．2D伺服阀矩形先导控制阀口气穴特性研究[J]．液压与气动，2018(4):8-14．
Lu Qianqian, Ruan Jian, Li Sheng. Study on cavitation characteristics of 2D Servo Valve rectangular pilot Control Valve [J]. Hydraulic and Pneumatic,2018(4):8-14.
[2]龙谦，阮健，李胜，等，考虑气穴影响的2D压力伺服阀稳定性[J]．航空学报，2020,41(5):1-13.
Long Qian, Ruan Jian, Li Sheng et al., stability of 2D pressure servo valve considering the influence of cavitation [J]. Journal of Aeronautics,2020,41(5):
1-13.
[3] Lee M G, Lim C S, Han S H. Shape design of the bottom plug used in a 3-way reversing valve to minimize the cavitation effect[J]. International Journal of precision engineering and manufacturing, 2016, 17(3): 401-406.
[4]张皓晨,左志钢,刘树红，等．高速涡轮泵额定工况空化特性及压力脉动预测 [J]. 工程热物理学报,2015,36(12):2633-2636.
Zhang Haochen, Zuo Zhigang, Liu Shuhong, et al. Cavitation characteristics and pressure pulsation prediction of high speed turbine pump under rated conditions [J]. Journal of Engineering Thermal Physics and Science, 2015 Journal 36 (12): 2633-26.
[5]朱相源，江伟，李国君，等. 导叶式离心泵内部流动特性数值模拟[J].农业机械学报，2016，47(6):34-41.
Zhu Xiangyuan, Jiang Wei, Li Guojun, et al. Numerical simulation of internal flow characteristics of guide vane centrifugal pump [J]. Journal of Agricultural Machinery, 2016 .47 (6): 34-9.
[6]张德胜，潘大志，施卫东，等. 轴流泵空化流及其诱导压力脉动的数值模拟[J]. 华中科技大学学报：自然科学版,2014,42(1):34-38.
Zhang Desheng, Pan Dazhi, Shi Weidong, et al. Numerical simulation of cavitation flow and its induced pressure fluctuation in axial flow pump [J]. Journal of Huazhong University of Science and Technology: natural Science Edition, 2014.
[7]周大庆，姜胜文，陈会向. 液控蝶阀联动的混流泵机组启动过程数值模拟[J]. 排灌机械工程学报,2019,37(2):112-117.
Zhou Daqing, Jiang Shengwen, Chen Huixiang. Numerical simulation of start-up process of mixed-flow pump unit with hydraulic control butterfly valve [J]. Journal of drainage and Irrigation Machinery Engineering, 2019 ~ (7) 37 (2): 112-117.
[8]李贝贝,刘秀梅,龙正，等. 基于Fluent的节流阀油液空化流场数值分析[J]. 振动与冲击,2015,34(21):54-58.
Li Beibei, Liu Xiumei, long Zheng, et al. Numerical analysis of oil cavitation flow field of throttle valve based on Fl uent [J]. Vibration and shock, 2015, 34 (21): 54-58.
[9]李树勋，沈恒云. 活塞式流量调节阀空化特性及其压力脉动响应[J]. 华中科技大学学报：自然科学版,2020,48(12):1-8.
Li Shuxun, Shen Hengyun, etc. Cavitation characteristics and pressure pulsation response of piston flow regulating valve [J]. Journal of Huazhong University of Science and Technology: natural Science Edition, 2020, 48 (12): 1-8.
[10]叶志烜，胡春艳，刘建峰，等.基于动网格的蝶阀启闭过程的数值模拟研究[J].流体机械,2018,46(4):29-33.
Ye Zhixing, Hu Chunyan, Liu Jianfeng, et al. Numerical simulation of butterfly valve opening and closing process based on dynamic grid [J]. Fluid Machinery, 2018. 46 (4): 29-33.
[11]杨志贤，于娜，毛卫平，等. 中心型蝶阀流场的数值模拟与流动特性分析[J]. 液压与气动,2016,1:95-99.
Yang Zhixian, Yu Na, Mao Weiping, et al. Numerical simulation of flow field and analysis of flow characteristics of central butterfly valve [J]. Hydraulic and Pneumatic, 2016pj1purl 95-99.
[12]赵伟国，翟利静，夏添，等.离心泵叶片开槽抑制空化数值模拟[J]. 农业机械学报，2018，49(12):150-157.
Zhao Weiguo, Zhai Lijing, Xia Tian, et al. Numerical simulation of cavitation suppression by slotting blade of centrifugal pump [J]. Journal of Agricultural Machinery, 2018. 49 (12): 150-157.
[13]Wang C,Li G X, Sun Z Y,et al. Effects of structureparameters on flow and cavitation characteristics within control valve of fuel injector for modern diesel engine[J].Energy Conversion and Management,2016,124: 104-115.
[14] ZhengZ,Ou G, Ye H, et al.Numerical analysis on cavitation erosion of a high pressuredifferential control valve[C]. ASME Pressure Vessels and Piping Conference, Vancouver, Canada, 2016.
[15]陈烜，阮健，刘奎，等.弓形和矩形先导级2D 伺服阀动态特性分析[J].农业机械学报，2020，51(2):418-425.
Chen Jian, Ruan Jian, Liu Kui, et al. Analysis of dynamic characteristics of bow and rectangular pilot 2D servo valves [J]. Journal of Agricultural Machinery, 2020, 51 (2): 418-425.
[16] ANSYS, Inc. ANSYS Fluent Theory Guide. Release 19.0, 2018,Chapter4~17.
[17]高志新.阀内节流处的空化发生机理与抑制方法研究[D].杭州：浙江大学，2013.
Gao Zhixin. Study on Cavitation Mechanism and Inhibition Method at Throttling Place in Valve [D]. Hangzhou: Zhejiang University, 2013.