Fig. 3. Outer wall temperature profile for inlet mass flow rate of 8.5 mg/s and equivalence ratio of 0.8 for different mesh sizes.Figure optionsDownload full-size imageDownload as PowerPoint slide
4. Results and discussion
4.1. Model validation
The developed 3-D model C 021 validated against the experimental results of Li et al. . The inlet and combustor lengths for the experimental setup are 7 mm and 20 mm, respectively. The step size and the wall thickness are both 0.5 mm. The expansion ratio of 4 was used by the gynoecium investigators which governs the step size of the combustor. In the experimental study of Li et al., the authors present both experimental results, which includes the outer wall and the exit temperatures, as well as 2-D axi-symmetric numerical simulations.
Fig. 4. Comparison of (a) different turbulence models and (b) chemistry models for circular cross-section at 12 m/s inlet velocity and 0.8 equivalence ratio.Figure optionsDownload full-size imageDownload as PowerPoint slide