Numerical Simulation and Flow Characteristic Analysis of Labyrinth Control Valve

For the labyrinth trap regulating valve, combined with the principle of multistage step-down principle, the boundary conditions are set according to the actual working conditions. The k − ε turbulent model is used to simulate the internal flow field of the labyrinth valve, and the influence of valve opening on the flow field is studied. According to the relevant design theory of labyrinth disk, the flow resistance coefficient and flow coefficient under different valve openings are calculated, and the flow characteristic curve is fitted and compared with the ideal curve. The results show that the flow resistance coefficient decreases linearly with the increase of opening. And the change of opening has little effect on the average velocity of the flow field. The research results provide an important reference for the design of labyrinth valve.