| The cooling system in gas turbines plays an important role in providing a reliable environment for the gas turbine to work effectively and safely. Fluid net work method can simulate complicated flow paths, so it is widely used in designing, checking and performance improving of mechanical equipments such as aircraft engine, petrochemical industry, air conditioning, etc.This study is aimed at choosing an appropriate method to design check and improve a cooling air system for a gas turbine by summarize existing calculating method, model building method and overall performance coupling method. It is also aimed at setting a platform in which the design and analysis of the gas turbine cooling air system can be carried on. The details of the contents are as follows:(1) The usage of fluid net work method in analyzing the performance of gas turbine cooling air system is summarized. A proper research route is chosen.(2) The feasibility of setting up a fluid net work by means of a platform and the formation of elements are studied. Necessary customized element models are created and the performances of them are studied to ensure the accuracy.(3) The cooling air system of the high pressure turbine blade of the E3aircraft engine from a NASA report is studied. A fluid net work of the cooling air system is set up by adding some customized components to the platform and finally the result is analyzed.(4) A fluid net work of cooling air system from compressor side to turbine side is set up, and then it is combined with fluid net work of turbine blade to form a whole fluid net work of the cooling air system. The results are analyzed to help designing a new cooling air system. |
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