Analysis of Dynamic Characteristics of Floating Gas Valves

The floating valve is primarily used in solid attitude and orbit control engine systems requiring rapid response, offering advantages such as fast actuation and stable, reliable operation. Investigating the dynamic characteristics of floating valves contributes to their performance enhancement. This study employs CFD numerical simulation methods, utilizing dynamic mesh and 6DOF techniques to establish a two-dimensional transient model of the floating valve, through which its dynamic behavior is analyzed. The results reveal the variations in internal velocity field, pressure field, and temperature field during the valve's opening and closing processes, as well as the motion displacement of the needle under differential pressure-driven conditions. The study further refines the analysis of the working mechanism during the dynamic response process, dividing the opening and closing phases into three distinct stages: preparation phase, movement phase, and stabilization phase. These findings provide valuable references for engineering design.