Influences of the turbulence model and the slot width on the transverse slot injection flow field in supersonic flows |
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| Affiliation: | 1. Department of Mechanical Engineering, Babol University of Technology, Babol, Iran;2. Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran;3. Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Tehran, Iran;4. Niroo Research Institute (NRI), P.O. Box 14655-517, Tehran, Iran;1. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China;2. Airbreathing Hypersonics Research Center of China Aerodynamics Research and Development Center, Mianyang 621000, China;1. Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran;2. Department of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran, Iran;3. Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran;4. Department of Mechanical & Aerospace Engineering, Ramsar Branch, Islamic Azad University, Ramsar, Iran |
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| Abstract: | Transverse slot injection scheme is very important for the mixing process between the air and the fuel in supersonic flows. The effect of the turbulence model and slot width on the transverse slot injection flow field has been investigated numerically based on the grid independency analysis, and the predicted results have been compared with the experimental data available in the open literature. The obtained results show that the grid scale makes only a slight difference to the wall pressure profiles for all jet-to-crossflow pressure ratios employed in this study, and the wall pressure profile with low jet-to-crossflow pressure ratio is predicted accurately by the RNG k–ε turbulence model, the SST k–ω turbulence model for the flow field with high jet-to-crossflow pressure ratio. High jet-to-crossflow pressure ratio can increase the jet penetration depth in supersonic flows, and the gradient of the length of the upstream separation region is larger than that of the height of the Mach surface. At the same time, when the jet-to-crossflow pressure ratio is maintained constant, the jet penetration depth increases with the increase of the slot width. |
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