Journal ArticleDOI
Prediction of Inert Turbulent Swirl Flows
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In this article, numerical finite-difference predictions are made of inert turbulent boundary-layer swirling flows using a variety of turbulence models and a nonisotropic model is found to show more realistically the effects of swirl on jet development.Abstract:
Numerical finite-difference predictions are made of inert turbulent boundary-layer swirling flows. A variety of turbulence models are considered and a nonisotropic model is found to show more realistically the effects of swirl on jet development. Gross effects may be represented by an extended Prandtl mixing length model but constants appearing do not exhibit universality. This deficit is partially overcome by the use of an algebraically-modeled, nonisotropic energy-length turbulence model. The Richardson number and the local swirl number play important parts in linking the rtf-shear with the rx-viscosity and the nonisotropy of the turbulent viscosity.read more
Citations
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Journal Article
Bubbles, Drops, and Particles
TL;DR: In this paper, the authors evaluated the applicability of the standard κ-ϵ equations and other turbulence models with respect to their applicability in swirling, recirculating flows.
Journal ArticleDOI
Swirl Flows in Combustion: A Review
TL;DR: In this article, the major features of the characterization of swirl flow combustion, with emphasis on application to practical combustors, are surveyed with special regard to the main effects of swirl on the performance, stability, and combustion intensity of flames in combustors.
Journal ArticleDOI
Turbulence models and their applications to the prediction of internal flows: a review
TL;DR: In this paper, a brief account of various turbulence models employed in the computation of turbulent flows, and evaluation of the application of these models to selected internal flow configurations is presented. But, the main conclusions of this analysis are: (1) the k-epsilon model is used in a majority of all the two-dimensional flow calculations reported in the literature; (2) modified forms of the K-Epsilon model improve the performance for flows with streamline curvature and heat transfer; (3) for flow with swirl, the algebraic stress model performs rather
Journal ArticleDOI
Computation of strongly swirling axisymmetric free jets
TL;DR: In this article, a methode des differences finies de jets libres fortement tourbillonnaires is defined, and a recirculation apparait a proximite de la tuyere, in which l'introduction de modifications liees au tour-billonnement dans le modele de turbulence k-e and aux changements dans les conditions aux limites pour la vitesse de dissipation e and la Vitesse radiale au plan d'entree du jet
Book ChapterDOI
Numerical Prediction of Axisymmetric Free Shear Flows with a Reynolds Stress Closure
Brian Launder,A. Morse +1 more
TL;DR: In this paper, the application of the Reynolds stress closure of [2] to the calculation of the axisymmetric jet in stagnant surroundings with and without swirl was dealt with and a technique for handling the numerical solution of the equations with the Patankar-Spalding 2-dimensional parabolic scheme was first presented including a practice for reducing the sensitivity of the solution to the forward step.
References
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Journal ArticleDOI
The analogy between streamline curvature and buoyancy in turbulent shear flow
TL;DR: In this paper, a formal algebraic analogy is drawn between meteorological parameters such as the Richardson number and the parameters describing the effect of rotation or streamline curvature on a turbulent flow.
Journal ArticleDOI
Experimental Investigation of Swirling Vortex Motion in Jets
N. A. Chigier,A. Chervinsky +1 more