Aiming at the problem of low flow control accuracy of the dynamic flow balance valve

based on the orifice flow and concentric annular gap flow equations

the spool opening profile was initially designed

and the pressure difference compensation coefficient factor correction method was proposed to optimize and modify the existing profile formula. Based on the large eddy simulation (LES) turbulence model

the flow control accuracy and flow accuracy error of the dynamic flow balance valve before and after optimization were studied by numerical simulation

the influence of the valve core opening profile on the pressure pulsation intensity was compared and analyzed

and a flow test bench was built to verify the proposed optimization method. The results show that the pressure difference compensation factor correction method to optimize the spool opening profile can effectively reduce the pressure pulsation intensity of the spool end face

and improve the flow control accuracy of the dynamic flow balance valve to 3.7%. The flow field simulation calculation and the experimental results basically coincide with the trend.