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<p>Shock wave boundary layer interaction (SWBLI) can induce extremely high temperatures and oscillations leading to performance degradation, structural fatigue, and other potential failures. Therefore, controlling SWBLI has become one of the key research topics in high-speed viscous flows. This study introduces a novel passive control method for SWBLI, in which a wall jet is injected parallel to the main airflow through a recirculation system. To evaluate its performance, the flow and temperature fields of compressible turbulent airflow in a two-dimensional channel are simulated through numerical solutions of the Favre-Averaged Navier-Stokes equations along with the <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:k-\omega\:\)</EquationSource> </InlineEquation> shear stress transport (SST) turbulence model. It is shown that the proposed method outperforms a previously reported one in key aspects, producing a significant reduction in separation bubble size, a lower maximum Stanton number, and a higher recirculation flow rate. Numerical calculations are also performed on a channel without a control structure, for comparison. The effect of the Reynolds number on SWBLI characteristics is also discussed.</p>

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Passive control of shock wave turbulent boundary layer interaction via a wall jet

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Alaattin Yolaçtı,
  • Oktay Özcan,
  • Kenan Kaya

摘要

Shock wave boundary layer interaction (SWBLI) can induce extremely high temperatures and oscillations leading to performance degradation, structural fatigue, and other potential failures. Therefore, controlling SWBLI has become one of the key research topics in high-speed viscous flows. This study introduces a novel passive control method for SWBLI, in which a wall jet is injected parallel to the main airflow through a recirculation system. To evaluate its performance, the flow and temperature fields of compressible turbulent airflow in a two-dimensional channel are simulated through numerical solutions of the Favre-Averaged Navier-Stokes equations along with the \(\:k-\omega\:\) shear stress transport (SST) turbulence model. It is shown that the proposed method outperforms a previously reported one in key aspects, producing a significant reduction in separation bubble size, a lower maximum Stanton number, and a higher recirculation flow rate. Numerical calculations are also performed on a channel without a control structure, for comparison. The effect of the Reynolds number on SWBLI characteristics is also discussed.