Regulatory Characteristics and Structural Analysis of Sleeve Rotary Valves Based on One-way Fluid–structure Coupling

Regulating valves are critical components in rocket engines. Understanding the valve's control characteristics and stress distribution is significant for thrust control and ensuring safety. In this paper, a new type of sleeve rotary valve is studied using computational fluid dynamics and one-way fluid-structure coupling method. The variation in the mass flow rate, forces and torque on the sleeve at different openings are analyzed. As the opening increases, the flow rate increases, the force decreases, and the direction of the torque changes. The stress and strain distribution are obtained. The maximum stress and deformation were 354.27MPa and 0.16mm, which are both within acceptable ranges. Therefore, the valve can operate reliably under high-pressure conditions. The effect of the angle between the pipe and sleeve axis is analyzed. Adjusting the angle from 40° to 60° increased maximum flow by 21% while reducing maximum stress and deformation by 20% and 44%, respectively. Thus, increasing the angle is a viable method to improve the valve. This study provides a reference for the design and improvement of this type of valve.