Comparison of Engineering Correlations for Predicting Heat Transfer in Zero-pressure-gradient Compressible Boundary Layers with CFD and Experimental Data
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
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The aim of this report is to investigate the details and performance of several engineering correlation methods used for predicting skin friction and heat transfer rates in high-speed flows. These are the van Driest, Eckert and Spalding Chi correlations, which, in the form presented herein, can only be used for zero-pressure-gradient flows. This limits the scope of the report to flow past flat plates, and also wedges and cones with attached shock waves. The main result is a series of comparisons with experimental and CFD data of Stanton Numbers, heat transfer rates, skin friction coefficients and viscous length scales computed with the engineering correlations. Good agreement was observed among the laminar correlation, CFD and experimental data. Comparisons of turbulent correlation results with CFD and experimental data produced reasonable agreement in most cases, although the van Driest and Eckert correlations tended to over-estimate heat transfer rates on cold walls.
- Fluid Mechanics