Theoretical Analysis and Experimental Study of Flow Field Characteristics in the Direct Relief Valve
To analyze the effect of the cone angle of the valve seat on the cavitation characteristics of the flow field,this paper takes a direct relief valve as the object.A theoretical model of direct relief valve is established based on differential equations of motion,and the gas-liquid two-phase flow characteristics under different valve seat cone angles were simulated by CFD software.The theoretical calculation and simulation results are in good agreement with experimental results,and the theoretical calculation deviation is 1.88%,the simulation deviation is 3.06%.The results show that the fluid will form local cavitation at the cone angle of valve seat,which will induce the noise of direct relief valve,and the cavitation phenomenon can be effectively improved by changing the cone angle of valve seat.The relevant research results can provide reference for the design of cone angle of valve seat in the direct relief valve.
direct relief valvetheoretical modelingcavitation optimization
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