A new method for performance map prediction of automotive turbocharger compressors with both vaneless and vaned diffusers

Author:

Li Xiaojian1ORCID,Zhao Yijia2,Liu Zhengxian1ORCID,Yao Huadong3,Chen Hua4

Affiliation:

1. Department of Mechanics, Tianjin University, Tianjin, China

2. School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, China

3. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Gothenburg, Sweden

4. Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian, China

Abstract

A new approach to predict the performance maps of automotive turbocharger compressors is presented. Firstly, a polynomial equation is applied to fit the experimental data of flow coefficient ratios for the centrifugal compressors with both vaneless and vaned diffusers. Based on this equation, the choke and surge flow coefficients under different machine Mach numbers can be quickly predicted. Secondly, a physically based piecewise elliptic equation is used to define compressors’ characteristic curves in terms of efficiency ratio. By introducing the flow coefficient ratio into the efficiency correlation, the empirical coefficients in the piecewise elliptic equation are uniquely calibrated by the experimental data, forming a unified algebraic equation to match the efficiency maps of the compressors with both vaneless and vaned diffusers. Then, a new universal equation, which connects the work coefficient, the impeller outlet flow coefficient and the non-dimensional equivalent impeller outlet width, is derived by using classical aerothermodynamic method. The off-design pressure ratio is predicted based on the equivalent impeller outlet width with less knowledge of the compressor geometry and no empirical coefficients. Finally, three state-of-the-art turbocharger compressors (one with vaneless diffuser, two with vaned diffusers) are chosen to validate the proposed method, and the results show a satisfactory accuracy for the performance map prediction. This method can be used for the preliminary design of turbocharger compressors with both vaneless and vaned diffusers, or to assess the design feasibility and challenges of the given design specifications.

Funder

national key research and development program of china

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Mechanical Engineering,Aerospace Engineering

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Effects on the design of aeronautical fuel cell systems by inclusion of reliability requirements;CEAS Aeronautical Journal;2024-06-03

2. An improved model for primary prediction of performance map for turbocharger radial turbine;Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering;2024-05-20

3. Investigating a New Method-Based Internal Joint Operation Law for Optimizing the Performance of a Turbocharger Compressor;Sustainability;2023-01-05

4. Redesign of casing treatment for a transonic centrifugal compressor based on a hybrid global optimization method;Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science;2021-08-18

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