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<p>The present study investigates oblique shock wave/turbulent boundary layer interactions laden with dilute-phase particles by conducting direct numerical simulations at a free-stream Mach number of 2.28 for varying particle mass loadings. As we can anticipate, the variations in mean velocities, Reynolds stresses, and skin friction indicate a reduction in turbulence intensities with increasing mass loadings upstream of the interaction zone. Unexpectedly, however, the enhancement of near-wall turbulence is found downstream of the interaction zone, driven by the combined influence of particle feedback forces and the strong shear layer generated by the oblique shock wave. This further leads to the elevation of the skin friction downstream of the interaction zone. Furthermore, high-inertia particles retain their comparatively high streamwise and vertical momentum, delaying both flow separation and reattachment and ultimately extending the separation zone.</p>

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On oblique shock/turbulent boundary layer interaction flows laden with particles

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Yexuan Xie,
  • Siwei Dong,
  • Ming Yu,
  • Xianxu Yuan

摘要

The present study investigates oblique shock wave/turbulent boundary layer interactions laden with dilute-phase particles by conducting direct numerical simulations at a free-stream Mach number of 2.28 for varying particle mass loadings. As we can anticipate, the variations in mean velocities, Reynolds stresses, and skin friction indicate a reduction in turbulence intensities with increasing mass loadings upstream of the interaction zone. Unexpectedly, however, the enhancement of near-wall turbulence is found downstream of the interaction zone, driven by the combined influence of particle feedback forces and the strong shear layer generated by the oblique shock wave. This further leads to the elevation of the skin friction downstream of the interaction zone. Furthermore, high-inertia particles retain their comparatively high streamwise and vertical momentum, delaying both flow separation and reattachment and ultimately extending the separation zone.