Abstract
A method of calculating the properties of axisymmetric swirling and nonswirling turbulent recirculating flows in wide-angle diffusers is described and appraised. It is based on the numerical solution of differential equations in orthogonal curvilinear coordinates with a two-equation model to represent turbulence characteristics of the flows. The appraisal is achieved by comparing calculated results with measurements obtained in wide-angle diffusers with expansion half-angles of 20 degree and 45 degree and swirl numbers of 0 and 0. 93. The results show that the mean velocity is represented within measurement accuracy for zero swirl number but, mainly due to the two-equation turbulence model, becomes less satisfactory with increasing swirl. Calculated values of the kinetic energy of turbulence are always significantly different from measurements, and the difference increases with swirl.
| Original language | English |
|---|---|
| Pages (from-to) | 145-164 |
| Number of pages | 20 |
| Journal | Numerical Heat Transfer |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| State | Published - 1982 |
ASJC Scopus subject areas
- General Engineering
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