A linear cascade has been geometrically scaled according to the similarity theory, a series of three dimensional numerical simulations are conducted on these geometric similar cascades with the CFD software. The differences of the aerodynamic performance between the original and the scaled linear cascades are investigated in details. The result shows that with the increasing of linear cascade size, the shape factor decreases at the same relative arc length position and the location of separation point moves towards trailing edge, resulting in the total pressure loss coefficient decreases and the static pressure raises coefficient increases.

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