Omar Ihab, El-Sharkawy Mohamed R, Ahmed Mohsen, Singh Pradeep Kumar, Rajab Husam, Ali Rifaqat, Ali Naim Ben, Rajhi Wajdi, Said Lotfi Ben, Abodollahi S Arman
Air Conditioning Engineering Department, Faculty of Engineering, Warith Al-Anbiyaa University, Karbala, 56001, Iraq.
Engineering of Technical Mechanical Power Department, Al-Amarah University College, Maysan, Iraq.
Sci Rep. 2024 Oct 9;14(1):23555. doi: 10.1038/s41598-024-75075-z.
The role of efficient fuel mixing and a stable flame holder is crucial in enhancing the performance and capabilities of scramjet engines for high-speed flight. The present research paper has tried to disclose the fuel mixing efficiency of 3-lobe annular nozzle on the mixing mechanism of the fuel jet behind the strut. In addition, using internal air jet flow for increasing the circulation strength and fuel mixing behind the strut is also examined in this study. Numerical simulation of the flow and fuel jet behind the strut is done to reveal the main physics related to the mechanism of fuel mixing inside the combustor with the proposed injection system. The results of our simulation show that using annular 3-lobe fuel jet improve the fuel mixing via production of the multiple vortex pairs within the combustor behind the strut. The use of internal air jet also enhances the fuel mixing efficiency up to 90% in combustor of scramjet engine.
高效的燃料混合和稳定的火焰稳定器在提升超燃冲压发动机高速飞行的性能和能力方面起着至关重要的作用。本研究论文试图揭示三尖瓣环形喷嘴对支柱后方燃料射流混合机制的燃料混合效率。此外，本研究还探讨了利用内部空气射流来增加支柱后方的循环强度和燃料混合情况。对支柱后方的流动和燃料射流进行了数值模拟，以揭示与所提出的喷射系统在燃烧室内燃料混合机制相关的主要物理现象。我们的模拟结果表明，采用环形三尖瓣燃料射流通过在支柱后方的燃烧室内产生多个涡旋对来改善燃料混合。内部空气射流的使用还可将超燃冲压发动机燃烧室内的燃料混合效率提高至90%。
