Experimental assessment of a nonlinear turbulent stress relation in a complex reciprocating engine flow | Zendy

Paul C. Miles | Zendy; Bret H. RempelEwert | Zendy; Rolf D. Reitz | Zendy

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Experimental assessment of a nonlinear turbulent stress relation in a complex reciprocating engine flow

Author(s) -

Paul C. Miles,

Bret H. RempelEwert,

Rolf D. Reitz

Publication year - 2009

Publication title -

experiments in fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.01

H-Index - 122

eISSN - 1432-1114

pISSN - 0723-4864

DOI - 10.1007/s00348-009-0669-7

Subject(s) - turbulence , reynolds stress , mechanics , reciprocating motion , nonlinear system , k epsilon turbulence model , shear stress , stress (linguistics) , reynolds stress equation model , materials science , physics , k omega turbulence model , thermodynamics , linguistics , philosophy , quantum mechanics , gas compressor

A nonlinear turbulent stress relationship, based on an explicit algebraic Reynolds stress closure, is compared against experimental data obtained in a swirl-supported, light-duty engine motored at constant speed. The model relationship is applied to measured mean velocity gradients and turbulence scales, and the predictions compared against the measured shear stress and normal stress anisotropy. Significant improvement over the linear stress relationship typically used in two-equation turbulence models is observed. Conditions under which the model predictions are poor are identified and the reasons for the poor performance discussed.

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