Towards Large Eddy Simulation of Cavitation in Hydraulic Valves School of Mech. Eng., Purdue Univ

Format:

Book

Conference/Event

Author/Creator:

Tao, X., author.

Conference Name:

International Off-Highway & Powerplant Congress & Exposition (2000-09-11 : Milwaukee, Wisconsin, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

The thesis of this paper is that cavitation in hydraulic spool valves involves large-scale vortical structures in an unsteady submerged jet. Current computational fluid dynamics approaches do not accurately predict these unsteady vortices, nor do they properly account for bubble-dynamics/flow-structure interactions. The large eddy simulation turbulence model was considered to overcome these deficiencies. First, a commercial code was applied to study cavitation in a model spool valve, addressing the effects of including a cavitation model and the large eddy simulation turbulence model. Second, a research code was developed to study the effect of cavitation inception on vortex dynamics in a submerged planar jet. A previously developed cavitation model, which accounts for interactions between large-scale vortical structures and cavitation bubbles, was employed. Results were obtained which demonstrate that even low levels of cavitation have significant effects on the jet vortex dynamics, including vortex intensification and splitting. An analysis of the vorticity transport equation reveals the underlying mechanisms behind these effects

Notes:

Vendor supplied data

Publisher Number:

2000-01-2613

Access Restriction:

Restricted for use by site license