Study On Heat-Transfer Of The Heat Pipe Under Dynamic Load

With the rapid development of electronic technology industry and aviation industry, the heat flux of airborne electronic equipment increase rapidly. But the traditional forced-air cooling technical enlarge air content from the engine, which can affect the engine the performance. As the heat pipe cooling technology has been used widely in the ground electronics facility, the heat pipe cooling technology becomes one new kind of airborne electronics cooling. But the board installation because of the flight vehicle maneuvering performance, especially the fighter aircraft maneuvering performance very is in particular strong, when airplane fast acceleration, deceleration or revolving has a dynamic load inevitably, this dynamic load will certainly to affect in all board installations. The dynamic load condition could have any type influence to the heat pipe heat transfer, at present still lacked this aspect the research.This paper first summary the principle and development of technologies of heat pipe, study on electronic equipment cooling technology development. On this basis, using the theoretical analysis and numerical simulation method, selecting of axial heat pipe heat transfer performance of the most axial acceleration as dynamic load conditions, using the commercial software Fluent in the heat pipe under dynamic load of the heat transfer process quantitative study. Emphasis on heat pipe under different dynamic load conditions change heat transfer; heat pipe wall temperature distribution and radial flow resistance changes, and so on, find that dynamic load will cause the wall surface temperature increase, reduce the heat transfer performance of heat pipe, but under different directions dynamic load on the performance of heat transfer is inconsistent. The numerical results also quantificationally show that the pressure of steam chamber decreased with flow, but a slight recovery in the export steam physical phenomenon; the liquid flow resistance results of the liquid reflect increased axial flow, flow resistance coefficient will increase. Finally, this study was summarized. The results of this study can be in the heat pipe cooling avionics equipment in the application of the reference.