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<p>This study simulated the aerodynamics of a blended wing body (BWB) at transonic and subsonic speeds. Lift, drag, and stall characteristics are observed in different kinds of aerodynamic conditions. The objective is to look into how surface roughness affects stall behavior and overall aerodynamic efficiency. Furthermore, the study extends its focus to assess the effect of surface roughness on aerodynamic performance. For three separate roughnesses, the flow properties surrounding the blended wing body are evaluated. The results show that the coefficients of lift and drag fluctuate in the subsonic region, but the stall angle remains unchanged. Flow characteristics demonstrate asymmetry in the airflow over the baseline model, which shifts toward symmetry with roughness. This change in flow characteristics is additionally seen in the transonic range, where variations in stall angle are prominent at&#xa0;roughness parameter 3. It is&#xa0;concluded&#xa0;that the addition of surface roughness causes noticeable changes in the characteristics of a blended wing body aircraft.</p>

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Effect of Surface Roughness Over a Blended Wing Body in the Subsonic and Transonic Regime

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • A. N. Arya,
  • M. D. G. Sarwar,
  • Sayed Ahmed Imran Bellary,
  • Shahid Tamboli,
  • S. M. Mozammil Hasnain,
  • D. Sahoo

摘要

This study simulated the aerodynamics of a blended wing body (BWB) at transonic and subsonic speeds. Lift, drag, and stall characteristics are observed in different kinds of aerodynamic conditions. The objective is to look into how surface roughness affects stall behavior and overall aerodynamic efficiency. Furthermore, the study extends its focus to assess the effect of surface roughness on aerodynamic performance. For three separate roughnesses, the flow properties surrounding the blended wing body are evaluated. The results show that the coefficients of lift and drag fluctuate in the subsonic region, but the stall angle remains unchanged. Flow characteristics demonstrate asymmetry in the airflow over the baseline model, which shifts toward symmetry with roughness. This change in flow characteristics is additionally seen in the transonic range, where variations in stall angle are prominent at roughness parameter 3. It is concluded that the addition of surface roughness causes noticeable changes in the characteristics of a blended wing body aircraft.