コーティング CMC 基板におけるサンドエロージョン現象の数値予測

抄録

When gas-turbine engines are exposed in sandy environment, sand particles are ingested from the engine inlet and they would impinge and erode the wall surfaces, which results in the engine failure. Therefore, sand erosion phenomenon is one of serious problems in gas-turbine engines and anti-erosion coating techniques have been developed recently. In this paper, numerical simulations of the jet flows including sand particles impinging on a plate are performed. The jet flow impinges on the coated ceramic material composite substrate and the particles erode its surface. We simulated two types of coated CMC, the Coating A and the Coating B. It is found that due to larger Young's modulus, the erosion rate of the Coating A substrate is smaller than that of the Coating B substrate.