Parameterization And Improved Study Of Cooling Structure In Turbine Blade

In the modern high performance gas turbine engine, with the continuous increase of the inlet temperature of the gas, the cooling of the turbine blade is becoming more important, and the blade cooling technology is playing much more significant role in improving gas turbine output and thermal efficiency. The structure of crossed-rib has good cooling effect, but its structure is too complex to machining, the rate of finished products is low. This paper seeks the alternative structure of the crossed-rib prototype blade to achieve a better cooling performance.From the perspective of relative literatures published at home and abroad, a lot of research were conducted to optimize the structural parameters of blade cooling, and obtained many important conclusions. However. it takes too much time to modeling, meshing and numerical calculation. Therefore, it's essential to quickly design to the advanced cooling structure meeting the requirements.This paper analyze and classify the characteristics of common cooling structure. Though extracting the design parameters to get the control parameters and establishing constraints and mathematical relationships to get driven parameters. In this way, the software can automatically generation the model. Batch processing the samples by using the Goal Driven Optimization of Ansys.According to the characteristics of cooling structures and the blade, the paper models the parametric blade in Pro/E, and numerical simulates in the CFX. The result indicates that the using of composite structure in blade can significantly reduce the temperature of blade surface.At the same time this structural style has a low impact on main flow. Through the comparative study of different cooling schemes, advantages and disadvantages of cooling structure used in blade are analyzed, which indicated a direction on optimization and improvement in cooling structure.