管路系统截止阀流体激振特性分析研究

Analysis on Fluid Induced Vibration in Stop Valve of Piping System

某核能装置冷却水系统常用的角式截止阀流体激振力较大,给管路系统振动噪声控制带来了一定的难度。为降低截止阀流体激振,对角式截止阀和直流式截止阀开展了流体激振特性对比分析。结果表明,两种截止阀阀后压力脉动均比阀前有所增强,但直流式截止阀阀后漩涡强度、阀芯受力、压力脉动幅度均小于角式截止阀,因此直流式截止阀的流体激振特性优于角式截止阀。

Fluid induced vibration of the angle stop valve was obvious which brings some difficulties for controlling the vibration and the noise in the cooling water system of some nuclear devices.For reducing the vibration,the fluid induced vibration characteristics of both the angle stop valve and oblique stop valve are calculated and compared.Results show that for both valves,the pressure fluctuation after the valves are larger than that before the valves.However,the intensity of vortex,the force of valve core and the amplitude of pressure fluctuation for the oblique stop valve are less than that of the angel stop valve,so the fluid induced vibration characteristics of the oblique stop valve is better than that of the angle stop valve.