The Air Cooling Analysis Of High Pressure Turbine Blade

With modern gas turbine efficiency and thrust requirements continue to increase,making the turbine inlet temperature requirements also increase,which will greatly increase the heat load and thermal stress of the turbine components,will do a tremendous harm to the blade.Therefore,in order to ensure the normal operation of the turbine blades and improve its service life,advanced turbine cooling technology is getting more attention.In this paper,the model of a rotor blade and a vane of a certain type of gas turbine were carried out,and this thesis gives the gas thermal coupling numerical simulation and flow and heat transfer analysis of the entire blades.Based on pro/E model、the ICEM mesh and the usage of CFX to make conjugate heat transfer numerical simulations,this paper performs numerical simulations with CFX.Then anslyse the cooling effect by comparing the output of the calculations of thermal insulation、convection cooling,film cooling on leading edge,film and impact cooling on leading edge,film cooling on trailing edge,film and impact cooling on trailing edge.Then the paper analyse of temperature,flow and heat transfer coefficient and other parameters,the results show the impact of film structure and impact cooling structure on the leading edge of the blade cooling play a very significant role in cooling and found that the cooling effect of the whole blade well.The paper had measured the mid-section of the rotor blade surface temperature distribution under certain experimental conditions,then performs CFD coupling calculation under the same conditions,the analysis of temperature distribution on the surface of the blade and the experimental results were compared,data error of two sets is very small,the curve of the data is very close,the experimental results and CFD results have a good mutual authentication.,and then calculate rotating blades under the same conditions,a good analysis of the temperature,pressure,velocity,heat transfer coefficient and other parameters,indicating the cooling structure of turbine blades with good cooling effect.