Electrical discharge machining (EDM) is a method that removing material by pulse discharge between the workpiece and the electrode. The surface after EDM would leave discharge craters, the size of the crater and the surface morphology are close related to the processing parameters. Beryllium copper alloy material is used, we focus on the surface after EDM treatment. The height of the surface is measured, and the datum are used to analyze the characteristic amplitude data. Then relationship between the surface topography and the EDM parameters are established. calculating the fitting frequencies and amplitudes of the surface, and the surface reconstruction is realized. Establishing the feature model of the surface, then simulate analyzing the velocity distribution of the fluid on the EDM surface by Fluent software under different machining parameters to investigate the drag reduction performance. The results are verified by real test experiment. This simulation study expands the EDM technology in engineering production for the drag reduction application.
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