Chiang Mai Journal of Science

Print ISSN: 0125-2526 | eISSN : 2465-3845

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A Numerical Study of Gas Jets in Confined Swirling Air Flow

Smith Eiamsa-ard*[a] and Pongjet Promvonge [b]
* Author for corresponding; e-mail address: smith@mut.ac.th
Volume: Vol.33 No.3 (SEPTEMBER 2006)
Research Article
DOI:
Received: 9 March 2006, Revised: -, Accepted: 10 July 2006, Published: -

Citation: Eiamsa-ard S. and Promvonge P., A Numerical Study of Gas Jets in Confined Swirling Air Flow, Chiang Mai Journal of Science, 2006; 33(3): 255-270.

Abstract

A numerical investigation of gas jets in confined swirling air flow is presented. Computations were performed using a simplified algebraic Reynolds stress model (ASM). The k- ε turbulence model was also employed in the present simulation for comparison. Emphasis is given to the derivation of an algebraic Reynolds stress model (ASM) for 2D axisymmetrical flows, particularly to the model constants in the algebraic Reynolds stress equations. The code, based on a staggered finite volume approach with the standard k- εmodel and first-order numerical schemes built-in, is used to carry out all the computations. The code has been modified in the present work to incorporate the ASM and the secondorder numerical schemes. For such a flow compared, the predicted results of gas tangential and axial velocities based on the ASM model are in fairly good agreement with the measurements. The computation shows that the ASM is superior to the k- ε model in capturing the swirling flow fields.

Keywords: ASM, confined swirling air flow, k- ε turbulence model, swirl flow

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