Research Of Pipe-net Method Application In Heat Transfer Design Of Turbine Blade

Gas turbine is widely used in various industrial uses such as aviation, marine,locomotive propulsion systems, gas and power generation. With the increasingturbine inlet temperature of the gas turbine, the turbine blade cooling structurebecomes more and more complex, and the heat transfer design of cooling blade isfacing growing challenges. Accurate and rapid heat transfer analysis and calculationis the key point of cooling blade heat transfer design. Being able to simulatecomplex flow system quickly and efficiently, the network analysis method isindispensable of blade heat transfer analysis.In this paper, the application of network analysis method in turbine blade heattransfer design were studied, a mathematical model to calculate the pipe networkwas derivated in detail.and the method for solving network model wasdescribed.Then a hybrid algorithm consisted of an iterative algorithm used by theHarbin Institute of Technology and a pressure correction algorithm was developed tosolve the momentum equation and mass equation and the energy equation wasrespectively resolved by an sequential algorithm.The network analysis computerprogram was created.A number of typical flow model were calculated using theprogram. The difference between the program calculation result and the literatureresults or the analytical solutions is tiny. Subsequently, the check-off program isapplied to an air-cooled gas turbine blade preliminary heat transfer design.Comparative analysis of the three-dimensional thermal coupling calculation andpipe network calculations was done.The deviation of total calculated mass ofcooling gas is small and temperature trends are consistent with each other.