This chapter examines the influence of hole diameter, porosity, thickness-to-diameter ratio, and stagger angle on the performance of porous bleed control in mitigating the negative effects of shock-wave/boundary-layer interactions. A detailed numerical study focuses on the control of an irregular shock reflection, or Mach reflection, where a separation bubble below the shock foot is present in the uncontrolled case. Implementing bleed control modifies the flow field significantly, with variations in bleed rates upstream and downstream of the shock because of the external flow characteristics. The findings indicate that smaller hole diameters enhance bleed efficiency and control effectiveness, while porosity levels and thickness-to-diameter ratios exhibit complex trends, with a medium thickness-to-diameter ratio and a stagger angle of \(45^{\circ }\) emerging as optimal configurations for effective shock-wave/boundary-layer control.

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

Parameter Influence on Porous Bleed Performance for Shock-Wave/Boundary-Layer Interaction Control

  • Julian Giehler,
  • Pierre Grenson,
  • Reynald Bur

摘要

This chapter examines the influence of hole diameter, porosity, thickness-to-diameter ratio, and stagger angle on the performance of porous bleed control in mitigating the negative effects of shock-wave/boundary-layer interactions. A detailed numerical study focuses on the control of an irregular shock reflection, or Mach reflection, where a separation bubble below the shock foot is present in the uncontrolled case. Implementing bleed control modifies the flow field significantly, with variations in bleed rates upstream and downstream of the shock because of the external flow characteristics. The findings indicate that smaller hole diameters enhance bleed efficiency and control effectiveness, while porosity levels and thickness-to-diameter ratios exhibit complex trends, with a medium thickness-to-diameter ratio and a stagger angle of \(45^{\circ }\) emerging as optimal configurations for effective shock-wave/boundary-layer control.