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Simulation of gas water two-phase flow in diesel turbocharger

Yao, Jun; Yao, Yufeng; Mason, Peter; Zhang, Tao; Heyes, F. J. G.; Roach, P. E.

Authors

Dr Jun Yao Jun.Yao@uwe.ac.uk
Senior Lecturer Aerospace Themofluids

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering

Peter Mason

Tao Zhang

F. J. G. Heyes

P. E. Roach



Abstract

Numerical simulation of a gas water two-phase flow in Diesel Turbocharger has been carried out using computational fluid dynamics solution of the Eulerian Reynolds-averaged Navier-Stokes equations for the continuum gas phase and the Lagrangian particle tracking method for the discrete water droplets. A generic diesel turbocharger configuration was chosen, which has an upstream duct inlet and a downstream blade ring outlet. Three identical water injectors were evenly distributed in the circumferential direction and located upstream of the blades. Simulation considered water injection at an angle of 30o from the centerline with two water pump pressures of 4 bars and 8 bars. The process of liquid droplet break-up has been modeled using the Blob model for primary break-up and the cascade atomization breakup (CAB) and the Reitz and Diwakar breakup (RDB) models for secondary break-up. The results show that the predicted water droplet coverage and the blade temperature drop were in good agreement with experimental measurements. Simulations also showed that for the two water pump pressures considered, the water droplet coverage and distribution patterns on the blade ring change little, indicating the need to increase the number of injectors for better water washing performance.

Presentation Conference Type Conference Paper (unpublished)
Conference Name The 6th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion
Start Date Jul 11, 2009
End Date Jul 15, 2009
Publication Date Jul 1, 2009
Peer Reviewed Not Peer Reviewed
Keywords two-phase flow simulation, water droplets, turbocharger cleaning
Public URL https://uwe-repository.worktribe.com/output/994967
Publisher URL http://www.springer.com/engineering/energy+technology/book/978-0-7354-0744-2
Related Public URLs http://eprints.kingston.ac.uk/5873/
Additional Information Title of Conference or Conference Proceedings : The 6th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion