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Validation of turbulence models in a simulated air-conditioning unit

✍ Scribed by Z. G. Xu; D. H. T. Gotham; M. W. Collins; J. E. R. Coney; C. G. W. Sheppard; S. Merdjani

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
344 KB
Volume
26
Category
Article
ISSN
0271-2091

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✦ Synopsis

Details are given of a study to obtain experimental data in an idealized environment for the purpose of evaluating the corresponding computational predictions and which supplement parallel measurements made in actual packaged air-conditioning units. The system consisted of a purpose-built low-speed wind tunnel with a working section constructed to reproduce particular features of the real units. In the experiment, both the mean velocity profiles and turbulence properties of the flow are obtained from triple-hot-wire anemometry measurements. A numerical model, based on finite volume methodology, was used to obtain the solution of the Reynolds-averaged Navier -Stokes equations for incompressible isothermal flow. The Reynolds stress terms in the equations are calculated using the standard k-model and second-moment closure (Reynolds stress) models. The accuracy of the two models was evaluated against the experimental measurements made 10 mm downstream of a baffle. The results show that the standard k-model gave the better agreement except in regions of strong recirculation.

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