Non-uniform total temperature in a turbulent vortex street

Rona, Aldo; Bennett, W.P.

doi:10.2514/6.2001-2467

Cited by 1 publication

(3 citation statements)

References 6 publications

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“…The variation in magnitude and location of the total temperature distribution is linked to different vortex shedding characteristics between the experiment and computation. This link between the non-uniform total temperature field and the vortex shedding characteristics is indicated in previous work for circular cylinders 4,8,9 and turbine blades.…”

Section: Total Temperature Fieldmentioning

confidence: 98%

“…The numerical model cylinder diameter differs from previous work 8,9 for dynamic similarity with the experimental program. A cold flow of Mach number M = 0.6 approaches the cylinder.…”

Section: Flow Conditionsmentioning

confidence: 99%

“…American Institute of Aeronautics and Astronautics work 8,9 to be a predominant source of entropy production in the near wake region. The influence of the shearing flow is still identifiable to a lesser degree in the numerical prediction at the current downstream position of six cylinder diameters, Fig 7(b).…”

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confidence: 99%

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Experimental and Numerical Study of the Non-uniform Total Temperature in a Turbulent Mach 0.6 Vortex Street

Bennett

Rona

Ackerman

et al. 2003

41st Aerospace Sciences Meeting and Exhibit

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NOMENCLATURE ABSTRACTThis work investigates the non-uniform total temperature and total pressure downstream of a circular cylinder in transonic flow. At Mach 0.6 shock induced separation of the flow occurs from the surface of the cylinder. The unsteady shear layers roll up into vortices that are shed from the cylinder forming a von Kármán vortex street of convecting vortices. An experimental investigation of the vortex street is carried out at a distance of six cylinder diameters downstream. Time resolved total temperature measurements reveal the presence of localised 'hot spots' of increased total temperature at the edges of the wake and localised * Research Student.'cold spots' of decreased total temperature along the centre of the wake. The experimental measurements are compared against a concurrent numerical study using a time accurate numerical model with turbulence closure. The numerical model also captures the nonuniform total temperature and total pressure distribution downstream of the cylinder. The non-uniform total temperature and total pressure distribution is shown to be a source of entropy production. Comparison of the total temperature and total pressure distribution highlights the influence of the boundary layer development and separation characteristics on the vortex shedding and energy separation processes. This emphasizes the importance of including the effects of turbulence and boundary layer development in numerical studies of the energy separation downstream of circular cylinders.

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Section: Total Temperature Fieldmentioning

confidence: 98%

“…The numerical model cylinder diameter differs from previous work 8,9 for dynamic similarity with the experimental program. A cold flow of Mach number M = 0.6 approaches the cylinder.…”

Section: Flow Conditionsmentioning

confidence: 99%