Scholarlink

<p>This study investigates the flow and mixing characteristics produced by pulsating dual sonic jets injected in a streamwise tandem fashion into a supersonic cross-flow of Mach 2.1 using experimental and numerical techniques. The jets are injected from the bottom wall in an out-of-phase manner in the streamwise direction of the cross-flow. Experimental and numerical investigations based on mass fraction fluctuations and experimental Schlieren revealed the oscillatory nature of the injected jet. The isosurface of the lambda-2 criterion and helicity contours showed the presence of various dominant vortex structures, such as counter-rotating vortex pairs (CVPs), horseshoe vortices, and trailing CVPs (TCVPs). The pulsation of the jet resulted in a highly dynamic evolution of the vortex patterns, which enhanced the jet spread. It is found that the dynamically evolving first jet interacts with the second jet and results in a flapping-mode oscillation of the combined jet. The pulsating jet performed using the present control strategy showed significant mixing enhancement and improved penetration compared to a single injection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A study on pulsed sonic jet injection in supersonic cross-flow for mixing applications

  • 期刊论文

  • 发表日期：

    2025年6月19日

查看全文
  • Souvik Paul,
  • Spandan Maikap,
  • Arun Kumar Rajagopal,
  • Hardik B Kothadia

摘要

This study investigates the flow and mixing characteristics produced by pulsating dual sonic jets injected in a streamwise tandem fashion into a supersonic cross-flow of Mach 2.1 using experimental and numerical techniques. The jets are injected from the bottom wall in an out-of-phase manner in the streamwise direction of the cross-flow. Experimental and numerical investigations based on mass fraction fluctuations and experimental Schlieren revealed the oscillatory nature of the injected jet. The isosurface of the lambda-2 criterion and helicity contours showed the presence of various dominant vortex structures, such as counter-rotating vortex pairs (CVPs), horseshoe vortices, and trailing CVPs (TCVPs). The pulsation of the jet resulted in a highly dynamic evolution of the vortex patterns, which enhanced the jet spread. It is found that the dynamically evolving first jet interacts with the second jet and results in a flapping-mode oscillation of the combined jet. The pulsating jet performed using the present control strategy showed significant mixing enhancement and improved penetration compared to a single injection.