| Citation: | CHEN Lei, LI Dali, WANG Jingwen, et al. Automatic shape evaluation method of aeroengine blade inlet and exhaust edges[J]. Journal of Aerospace Power, 2023, 38（4）：986-993 doi: 10.13224/j.cnki.jasp.20210461
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At present, the evaluation of blade inlet and exhaust edge shape mainly relies on manual visual inspection, which has the problems of strong subjectivity and low detection efficiency. An automatic evaluation method of blade inlet and exhaust edge shape was proposed. The blade profile was fitted and the relevant profile parameters were extracted by non-uniform rational B-splines （NURBS） curve fitting, least square elliptic fitting and equal radius method. A qualitative definition was given for the unqualified shapes of five types of blade inlet and exhaust edge. The shape of the blade was evaluated according to the curvature characteristics of the blade inlet and exhaust edges in different shapes and the variation characteristics of deviation values. Experiments showed that the proposed method can realize the automatic evaluation of five edge shapes: cusp, blunt, inclined, necking and large small large/small large small （LSL/SLS）. The method has strong versatility for different blade types and acceptance standards, thereby improving the efficiency of the shape evaluation of blade inlet and exhaust edges.
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