Prediction of a Turbocharger Performance Under Pulsating Flow by Construction of an Unsteady One-Dimensional Flow Analysis Model

Yohei Nakamura; Manato Chinen; Masamichi Sakakibara; Yuudai Abe; Kazuyoshi Miyagawa

doi:10.5293/IJFMS.2020.13.4.743

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자료유형: 학술저널

저자정보: Yohei Nakamura (WASEDA University) Manato Chinen (WASEDA University) Masamichi Sakakibara (WASEDA University) Yuudai Abe (WASEDA University) Kazuyoshi Miyagawa (WASEDA University)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.13 No.4

발행연도: 2020.12

수록면: 743 - 749 (7page)

DOI: 10.5293/IJFMS.2020.13.4.743

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In recent years, because of the energy crisis, improving the thermal efficiency of automobiles has become a very important issue. It is known that a pulsating flow generated by engine valves affects the performance and efficiency of the turbocharger adversely [1]. However, the turbocharger characteristics under pulsating flow have not been clarified to a satisfying degree yet, and no prediction method of turbocharger performance has been established yet. In this study, an unsteady one-dimensional flow model of a turbocharger is constructed by modeling the physics of aerodynamic loss and unsteady characteristics based on experiments and 3D-CFD. Furthermore, the characteristics of the turbocharger under pulsating flow were predicted using the built one-dimensional unsteady flow model. Moreover, this one-dimensional model was implemented in GT-Power which is a one-dimensional commercial code used by many automobile companies.

#Turbocharger #Pulsating flow #Turbine #One dimensional flow model

Abstract
1. Introduction
2. Algorithm of the flow model
3. Pressure loss equation of the one dimensional flow model
4. Turbine and compressor experimental apparatuses
5. Comparison with the experimental results and the one dimensional analysis results
6. Unsteady flow model
7. Coupled analysis using GT-Power
8. Conclusion
References

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