Effect of Microramps on Separated Swept Shock Wave–Boundary-Layer Interactions

Martis, R. R.; Misra, Anuradha; Singh, Amarjit

doi:10.2514/1.j052470

Cited by 20 publications

(1 citation statement)

References 24 publications

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“…Various shapes (34)(35)(36)(37)(38)(39) including standard designs such as microramps (31,32) and micro-vanes (30,33) were introduced in different shock-boundary layer interaction flowfields to examine their ability to reduce the flow separation and alleviate its ill effects. The control performance was found to improve with increase in the size of the MVG (31,40) but so did the wave drag associated with it. Although micro-vanes offer better flow control (33) , their slender shape makes them more susceptible to fracture than microramps which has a relatively robust design.…”

Section: Introductionmentioning

confidence: 97%

Effect of microramps on flare-induced shock – boundary-layer interaction

2019

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The ability of microramps to control shock - boundary layer interaction at the vicinity of an axisymmetric compression corner was investigated computationally in a Mach 4 flow. A cylinder/flare model with a flare angle of 25° was chosen for this study. Height (h) of the microramp device was 22% of the undisturbed boundary layer thickness (δ) obtained at the compression corner location. A single array of these microramps with an inter-device spacing of 7.5h was placed at three different streamwise locations viz. 5δ, 10δ and 15δ (22.7h, 45.41h and 68.12h in terms of the device height) upstream of the corner and the variations in the flowfield characteristics were observed. These devices modified the separation bubble structure noticeably by producing alternate upwash and downwash regions in the boundary layer. Variations in the separation bubble’s length and height were observed along the spanwise (circumferential) direction due to these devices.

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