| Citation: | ZHANG Xinyu，TU Baofeng，FANG Rui，et al.Design technology of a variable curvature blade type swirl distortion generator［J］.Journal of Aerospace Power，2022，37（9）：1957‑1969. doi: 10.13224/j.cnki.jasp.20210343
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In order to study the effect of inlet swirl distortion on the performance and stability of a compressor，a variable curvature blade type swirl distortion generator capable of producing typical twin swirls and bulk swirls was designed.In combination with the design method of orthogonal simulation test，the geometric parameters of the swirl distortion generator，including blade solidity，number of blades and hub ratio，were optimized with twin swirl intensity as the optimization objective and twin swirl intensity，bulk swirl intensity and bulk swirl total pressure recovery coefficient as the comprehensive optimization objectives，and the CFD numerical simulation was used to study the characteristics of the swirl produced by the generator.Under the single object optimization，the maximum twin swirl intensity was 24.60°，and the maximum bulk swirl intensity was 38.73°.After multi⁃index optimization design，the total pressure recovery coefficient of the twin swirl and the bulk swirl was improved by 4.26%and 3.57%，respectively.The design of the variable curvature blade type distortion generator has the advantages of simple structure，convenient operation，short testing time，presenting a favorable engineering application prospect.
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