Design Of Turbine Blades Matrix Cooling Channels Based On Experiment And Response Surface Method

As an important industrial gas turbine equipment,it is now widely used in various fields.Traditional fossil energy is increasingly scarce,the efficiency of machinery is the focus of domestic and foreign scholars.Gas turbine as an important power plant,to improve the overall thermal efficiency has a very important significance.In the method of improving the efficiency,it is a very effective method to improve the turbine inlet temperature.Blade cooling is an important way to improve the inlet temperature.Internal cooling is one of the ways of blade cooling.In this Paper,the internal cooling method of matrix cooling channels is chosen to study.The matrix cooling channels structure is complex,the flow resistance is large and the heat exchange ability is strong.In this Paper,the flow and heat transfer performance of the matrix cooling channels are studied by Numerical simulation and experimental research.Transient liquid crystal measurement technique was used to study the heat transfer of the upper surface of the matrix cooling channels.The heat transfer characteristics of the intercrossed matrix cooling channels and trapezoidal channels are obtained by Numerical simulation.The contents of this Paper include:1.The experiment of the matrix cooling channels was used the method of transient liquid crystal.And the heat transfer characteristics of the upper surface of the matrix cooling channels are obtained.The matrix cooling channels are Numerically simulated to obtain heat transfer characteristics and internal flow characteristics.The experimental results are comPared with the Numerical simulation results,The Numerical simulation method can accurately simulate the flow and heat transfer of the matrix cooling channels.2.In order to obtain the flow and heat transfer regularity of the matrix cooling channels under different structural Parameters.In this Paper,different channel Numbers,different rib angles and different blocking rates are selected for single factor analysis and response surface analysis.The effects of the structure on the flow and heat transfer characteristics of the matrix cooling channels are obtained.Finally we got the prediction equation.3 In order to study the effects of various structural factors on the performance of the cooling channel.A cascade rib cooling channel model of 13 different combinations of structures was established.Each model is calculated using 6 operating conditions.Use the method of response surface for data analysis.The influence of various structures on the flow and heat transfer characteristics of the cooling channel is obtained.4.staggered ribs cooling channel arrangement unchanged.Change the rectangular cross section to the trapezoidal inlet section.The size of the interior of the staggered ribs changes as the inlet cross section changes.Comparison of numerical results of different trapezoidal and rectangular inlet cross-section channels.The influence of the trapezoidal inlet cross section on the flow and heat transfer performance of the intermittent rib cooling channel was obtained.5.ComPared with the original model and the trapezoidal inlet cross-section of the heat transfer data.The heat transfer characteristics and the shape of the channel in the corner region of the cooling channel were investigated.