Transient Temperature of Shape Memory Alloy Valve for Aero Engines

Aiming at the higher heat dissipation demand of future high-performance aero engine, this paper proposes a high temperature shape memory alloy thermal control valve, which expands the application scenario of thermal control valve without changing the shape memory material. Through the unsteady solid thermal analysis calculation, the temperature field distribution of the internal structure of the valve core at different times was obtained, and the excess temperature curve of the shape memory alloy spring in the insulated sandwich of the shape memory alloy valve was obtained. By analyzing the curve, the time constant of the selected shape memory alloy thermal regulating valve was calculated to be 81 s. The obtained time constant can be used to guide the material selection of heat insulation structure and memory alloy spring in the process of engineering development.