Analysis of Dynamic Characteristics of Aviation Pneumatic Safety Valve Considering Fluid-structure Interaction Effect
The aviation propulsion system's pneumatic safety valve is affected by airflow during operation.Uneven internal loads induce deformation of the structure,affecting the dynamic performance of the aviation pneumatic safety valve. The working process of the aviation pneumatic safety valve's numerical simulation model was established by the two-way fluid-structure interaction theory.The accuracy of the simulation model was verified through pressure characteristic experiments.The aviation pneumatic safety valve's spool movement and the changes in pressure and velocity of the internal flow field were analyzed.The relationship between the internal flow field and structural deformation was explored.The results show that the valve spool tends to be stable after oscillation adjustment.The valve port opening is stable at 0.45 mm,and the gas flow rate changes significantly at the valve port.The maximum velocity is 325.9 m/s.The valve seat,shell,valve assembly,and seat plate undergo a certain degree of elastic deformation.The valve seat has a more extensive elastic deformation,with a maximum deformation of 6.554 ×10-5 mm.
万方数据
维普
