ABSTRACT

In this paper, a new asymmetric strut-based fuel injection is proposed and investigated for enhanced fuel-air mixing and combustion in supersonic combustors. The strut configuration is re-designed from a general symmetric strut to asymmetric strut such that asymmetry in the strut creates the vortices along the Z-axis (longitudinal) after the flow crosses over the lip of the strut. In the downstream of the combustor, the flow circulation grows resulting in improved mixing of fuel and air. The fuel is injected from the strut about the centerline of the combustor. Due to the presence of vortices inside the combustor, the air and fuel mixes properly which significantly increases the mixing and combustion efficiency. Various performance parameters are compared with a symmetric strut case to present a quantitative comparison between two injection schemes to show the advantages of enhanced mixing due to the application of asymmetric struts in supersonic combustors.

摘要

在本文中，提出并研究了一种新的基于非对称支柱的燃料喷射，以增强超音速燃烧器中的燃料-空气混合和燃烧。支柱配置从一般的对称支柱重新设计为不对称支柱，使得支柱中的不对称产生沿Z方向的涡流- 轴（纵向）在流过支柱的唇缘后。在燃烧器的下游，流动循环增加，从而改善了燃料和空气的混合。燃料从支柱围绕燃烧器的中心线喷射。由于燃烧器内部存在涡流，空气和燃料可以适当混合，从而显着提高混合和燃烧效率。将各种性能参数与对称支柱情况进行比较，以呈现两种喷射方案之间的定量比较，以显示由于在超音速燃烧器中应用不对称支柱而增强混合的优势。