Simulation of fabrication for gas turbine blade turbulated cooling hole in ECM based on FEM

Electrochemical machining (ECM) is an important manufacture technology in machining difficult-to-cut materials without tool wear and residual stress. In this study, ECM is used to machine the turbulated cooling hole on gas turbine blade for enhance efficiency of aircraft engine. However, because of the eroded size is hard to be determined in ECM, a new approach by employing computer simulation method is applied to overcome this difficulties. Mathematical model based on the various parameters is developed. Finite element method (FEM) is selected to analyze the electric field distribution and compute the corrosion process of the material by using the time-dependent simulation method. Minimum deviation of the simulated anode profile shape from the experimentation is performed. Furthermore, this proposed method could reduce the number of trials and save the expense greatly.

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