Topology Optimization and Temperature Control Performance Research of PCM-based Heat Sink in Hypergravity
The phase change material(PCM)based heat sink are expected to solve the difficult problem of thermal control for power-intensity electronic devices of high-speed aircraft.In order to enhance the temperature control performance of PCM-based heat sink,topological optimization design of heat transfer topology based on the SIMP topology optimization method of solid isotropic penalty function is conducted.However,high-speed aircraft are often under hypergravity during maneuvering flight,which may affect the thermal performance of PCM-based heat sink.Therefore,the temperature control performance of PCM-based heat sink with diffusion(Ⅰ)and natural convection(Ⅱ)optimized fins under hypergravity(1~7g)are investigated.The results show that heat sink Ⅱ performs better than heat sink Ⅰ,shortening the total melting time of PCM by 11 s,and with 60℃as the goal,the temperature control time of it is extended by up to 19.75%,17.44%,4.01%and 1.62%than heat sink Ⅰ at 1g,3g,5g and 7g.The natural convection of PCM driven by hypergravity significantly improve the heat transfer,but the enhancement effect gradually decreases with increasing values of hypergravity.Hypergravity strengthens heat sink Ⅰ more than heat sink Ⅱ and narrows the thermal performance difference between heat sink.
Phase change materialTopology optimizationHypergravityNatural convectionTemperature control