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
赵永华1,2，阮健1，丁川1，郜峰2. 基于FLUENT的二维阀空化与压力脉动的特性研究[J]. 振动与冲击, 2022, 41(18): 228-235.
ZHAO Yonghua1,2, RUAN Jian1, DING Chuan1, GAO Feng2. Characteristics of cavitation and pressure fluctuation of a two-dimensional valve based on FLUENT simulation. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(18): 228-235.
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