The Engine Compartment Thermal Simulation And Thermal Analysis

Heat transfer circs is very complex in engines, not only high temperature gas transfer heat for combustor-wall inside and turbine blades by thermal radiation and heat convection but also engine components transfer heat each other by conduction and radiation. Temperature distribution of the engine is the important gist to design engine for it influences the reliability of engine. The temperature field computation of engine cabin is to obtain the temperature change law according to thermal regime of engine in and out and heat control measure. It can provide reliable theory gist for the majorization project of control and cooling.Engine cabin refer to many parts,complex layout and all kinds of heat transfer measure such as conduction,convection and radiation. It is comparative complexity and difficulty to confirm temperature distribution of the system component because the system component is complex and the heat transfer mode is multiform and coupling idiocratic. Thermal network and fluid network method and corresponding computer simulation flatform are worthy to be recommended. So we can use it to compute the temperature distribution of the system when the accuracy of result has lower requirement especially for engineering heat exchange simulation. The method are adopted in spaceflight system such as space station, aerospaceplane and flight device.The software Sinda/Fluint is used to simulate an engine cabin in the paper. According to the data from the simulation three things have been done. The first one, it is analysed that the working performance be influence by heating the engine cabin parts. The second one, thermal protection and heat-control for heat unresisting component have been analysed and then it has been designed. On the basis of the content above, the project such as surface polishing and thermal insulating layer have been put forward then engine component can work in perfect condition.