基于流—固—热耦合的高温伺服阀蛇形流道散热罩散热效率研究OA

Electro-hydraulic servo systems are widely used in the field of aviation because they are characterized by large hydraulic loads and fast response.When the aircraft is in high temperature working condition,the electro-hydraulic servo system will be greatly affected,which is not conducive to the normal operation of the aircraft.In order to address this problem,this paper adopts the method of fluid-solid-thermal multi-field coupling to optimize the serpentine flow path of high-temperature servo valve heat sink.First of all,this paper introduces the theoretical basis of fluid-solid-heat three-field coupling.Then,seven heat sink models are designed in this paper,and the physical model and fluid model of the heat sink are established respectively.Finally,the heat dissipation effects of the seven models are analyzed on this basis.The results show that increasing the number of runner bars does not improve the heat dissipation efficiency,while increasing the heat sink groove width and groove depth can improve the heat dissipation efficiency,but the heat dissipation effect is not obvious.If the heat dissipation requirement is to be achieved,it can be realized by increasing the flow rate and decreasing the fluid temperature.