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Study on reconstruction and prediction methods of pressure field on blade surfaces for oil-filling process in a hydrodynamic retarder

Hongbin Mu (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China.)
Wei Wei (School of Mechanical Engineering, Beijing Institute of Technology, Beijing China AND National Key Lab of Vehicular Transmission, Beijing Institute of Technology, Beijing, China.)
Alexandrina Untaroiu (Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, United States.)
Qingdong Yan (School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China AND National Key Lab of Vehicular Transmission, Beijing Institute of Technology, Beijing, China.)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 1 August 2016

298

Abstract

Purpose

Traditional three-dimensional numerical methods require a long time for transient computational fluid dynamics simulation on oil-filling process of hydrodynamic braking. The purpose of this paper is to investigate reconstruction and prediction methods for the pressure field on blade surfaces to explore an accurate and rapid numerical method to solve transient internal flow in a hydrodynamic retarder.

Design/methodology/approach

Dynamic braking performance for the oil-filling process was simulated and validated using experimental results. With the proper orthogonal decomposition (POD) method, the dominant modes of transient pressure distribution on blades were extracted using their spatio-temporal structural features from the knowledge of computed flow data. Pressure field on blades was reconstructed. Based on the approximate model (AM), transient pressure field on blades was predicted in combination with POD. The causes of reconstruction and prediction error were, respectively, analyzed.

Findings

Results show that reconstruction with only a few dominant POD modes could represent all flow samples with high accuracy. POD method demonstrates an efficient simplification for accurate prediction of the instantaneous variation of pressure field in a hydrodynamic retarder, especially at the stage of high oil-filling rate.

Originality/value

The paper presents a novel numerical method, which combines POD and AM approaches for rapid and accurate prediction of braking characteristics during the oil-filling period, based on the knowledge of computed flow data.

Keywords

Acknowledgements

This work has been funded by the National Natural Science Foundation of China (NSFC) through Grant No. 51475041. The authors would like to thank Dr B. Zou for his earlier experimental work.

Citation

Mu, H., Wei, W., Untaroiu, A. and Yan, Q. (2016), "Study on reconstruction and prediction methods of pressure field on blade surfaces for oil-filling process in a hydrodynamic retarder", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 26 No. 6, pp. 1843-1870. https://doi.org/10.1108/HFF-05-2015-0166

Publisher

:

Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited

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