Research on disruptive design pre-identification in the preliminary design phase of aero engine flow pass multidisciplinary optimization |
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Institution: | 1. School of Energy and Power Engineering, Beihang University, Beijing 100083, China;2. Beijing Key Laboratory of Aero-Engine Structure and Strength, Beihang University, Beijing 100083, China;3. Jiangxi Research Institute, Beihang University, Nanchang 330096, China;4. Navigation and Control Technology Research Institute of China Ordnance Industries, Beijing 100089, China;5. Research Institute of Aero-engine, Beihang University, Beijing 100083, China |
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Abstract: | In aero engine design, determining whether the preliminary design will have disruptive effects on the detailed design is the key to multidisciplinary design optimization in the preliminary design stage. In order to adapt to the non-orthogonal parameter value range caused by the self-constrained parametric modeling method, a non-orthogonal space mapping method that maps the optimal Latin hypercube sampling points of the traditional orthogonal design space to the non-orthogonal design space is proposed. Based on the logical regression method in machine learning field, a kind of feasible domain boundary identification method is employed to identify whether the sample spatial response meets the relevant criteria. The method proposed in this paper is used to identify and analyze the key technologies of the high-pressure turbine mortise joint structure. It is found that the preliminary design of the aero engine may lead to the failure to obtain a mortise joint structure meeting the design requirements in the detailed design stage. The mortise joint structure needs to be pre-optimized in the preliminary design stage. |
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Keywords: | Aero engine Disruptive design Flow pass multidisciplinary optimization Pre-identification Preliminary design phase |
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