Simulation of gas-water two-phase flow in diesel turbocharger

Yao, J. and Yao, Y. and Mason, P. J. and Zhang, T. and Heyes, F. J. G. and Roach, P. E. (2010) Simulation of gas-water two-phase flow in diesel turbocharger. In: The 6th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion (AIP Conference Proceedings / Materials Physics and Applications) American Institute of Physics Conference Proceedings. 2010AIPC.1207..723Y, 1207 . American Inst. of Physics, USA, pp. 723-728. ISBN 9780735407442

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Official URL: http://dx.doi.org/10.1063/1.3366453

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 30° 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.

Item Type:Book Section
Additional Information: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 30° 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.
Keywords:two-phase flow, turbulent flow, Navier-Stokes equations, finite volume methods, bmjtype
Subjects:F Physical Sciences > F343 Computational Physics
H Engineering > H321 Turbine Technology
Divisions:College of Science > School of Engineering
ID Code:5436
Deposited By: Jun Yao
Deposited On:07 May 2012 10:44
Last Modified:07 May 2012 19:19

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