Simulation and Experimental Verification of Flow Field Dynamic Characteristics of Rotary Excitation Valve
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摘要: 提出一种旋转式激振阀，为分析激振阀旋转过程中阀口流场的分布特性，设计三种不同几何形状的阀口。基于半隐式连接压力方程计算模型，通过多参考系模型（MRF）网格滑移运动的方法对激振阀进行流场动态模拟，获得激振阀阀口的压力、速度、射流角及流量特性曲线。研究结果表明：随阀芯的旋转，激振阀的压力和流量呈先升高后降低的趋势，速度呈先下降后上升的趋势，射流角在60~120°的区间内逐渐上升；阀口形状对激振阀的压力、速度、流量有较大的影响，矩形阀口的压力、流量动态特性最佳。实验证明，激振阀流量曲线近似为正弦波，仿真方法与实验误差小于5%。Abstract: This paper presents a rotary excitation valve. In order to analyze the flow field distribution characteristics of the rotary valve in the rotation process, three types of valve cores with different geometric shapes are designed. Based on the semi-implicit connection pressure equation model, the flow field dynamic simulation of the excitation valve is carried out by the Multiple Reference Frame (MRF) sliding moving grid method, and the pressure, velocity, jet angle and flow characteristic curve of the excitation valve port are obtained. The results show that with the rotation of the valve core, the pressure and flow rate of the excitation valve increased at first and then decreased, the velocity decreased first and then increased, and the jet angle increased gradually in the range of 60~120 degrees. The shape of the valve port has a great influence on the pressure, speed and flow of the excitation valve. Among the three types of valve port, the pressure and flow characteristics of the rectangular valve port are optimal. The flow test proves that the flow curve of the excitation valve is approximately sinusoidal, and the error between simulation and experimental results is less than 5%.
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Key words:
- rotation /
- excitation valve /
- multiple reference frame /
- flow field /
- computational fluid dynamics /
- simulation /
- test
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