Mean-flow and turbulent characteristics of free and impinging jet flows

摘要: Numerical solutions are presented of the governing equations for three plane flows: laminar free jet; developing turbulent and impinging jet different ratios h/b nozzle height h above plate to width b.The accuracy numerical procedure is demonstrated by comparing solution Navier-Stokes laminar-flow case with their analytical boundary-layer solution. For flows these solved after Reynolds averaging. Closure achieved a two-equation turbulence model in conjunction alternative algebraic expressions stresses. The capabilities such an approach illustrated extent consistency predictions satisfactory agreement measurable quantities more reliable experimental data literature. limitations models employed, evident from lack universality, discussed light derivation complex ‘single-point’ closures.Features studied interest include: near-nozzle behaviour ‘finite’ potential core transition regions jet, along fully developed similarity profiles; enhanced heat-transfer characteristics flows; wall impingement standard wall-jet configuration.