Complete machine variable-dimension simulation method based on circumferential average through-flow model

By establishing a coupled simulation method for the zero-dimensional whole machine and two-dimensional component model of aero engine, the problem of difficulty in taking into account the simulation efficiency of the whole machine and the accuracy of local flow details is solved, and efficient and accurate whole machine performance evaluation is achieved, reducing computing resource consumption and R&D costs.

CN120470971AActive Publication Date: 2025-08-12AERO ENGINE ACAD OF CHINA
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Patent Information

Application Number
CN202510576095.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-06
Publication Date
2025-08-12
Estimated Expiration
2045-05-06

AI Technical Summary

Technical Problem

In the existing simulation methods of aero engines, simulation efficiency and local flow details are difficult to take into account, and traditional full three-dimensional computing resources consume too much, making it impossible to quickly evaluate the performance of the whole machine.

Method used

The whole-machine variable-dimensional simulation method based on the circumferential average flow model is adopted. By establishing a zero-dimensional whole-machine model and a two-dimensional component model of the aero engine, combining multi-scale coupling strategy and local high-precision correction of the three-dimensional blade model, the nonlinear equation system is reconstructed and solved, so as to achieve synchronous convergence between the whole machine and the component model.

Benefits of technology

It realizes convergence between simulation models in different dimensions, improves simulation accuracy and efficiency, shortens the calculation time to minute level, and has less than 5% simulation error, providing rich S2 flow field information, reducing R&D costs and cycles.

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Abstract

The invention discloses a complete machine variable-dimension simulation method based on a circumferential average flow model, belongs to the technical field of aero-engine numerical simulation and multi-scale modeling, and solves the problem that complete machine simulation efficiency and local flow detail precision are difficult to consider at the same time in the prior art. And traditional full-three-dimensional computing is too high in resource consumption and cannot quickly evaluate the performance of the whole machine. According to the method, a zero-dimensional complete machine and component two-dimensional model of the aero-engine is firstly established, dimensionality reduction is carried out by using a circumferential average N-S equation, the two-dimensional model is embedded into the zero-dimensional model, an equivalent replacement variable reconstruction equation set is solved, synchronous convergence of the complete machine and component models is realized, and simulation precision and efficiency are improved. According to the method, a full coupling mode is adopted, two-dimensional dimension reduction modeling is combined, minute-level convergence is achieved, the simulation error is not larger than 5%, the simulation precision is improved, the calculation efficiency is improved, rich S2 flow field information can be provided, and the research and development cost and period are reduced.
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