Finite Element Computation of Buzz Instability in Supersonic Air Intakes

Kotteda, V. M. Krushnarao; Mittal, Sanjay

doi:10.1007/978-3-319-40827-9_6

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Effects Of the Bleed On Buzz Phenomenon1

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2018

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“…70 Both little and big buzz can be eliminated when the bleed is implemented sufficiently upstream and downstream of the throat as shown in Figure 31 by removing the separated flow from the center body and cowl surfaces. [71][72][73] However, it reduces the intake mass flow rate and may result in a need for enlargement of the intake entrance that in turn increases the total drag of the vehicle.…”

Section: Effects Of the Bleed On Buzz Phenomenonmentioning

confidence: 99%

Boundary layer suction for high-speed air intakes: A review

Sepahi-Younsi

Feshalami

Maadi

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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The paper summarizes recent developments in boundary layer suction for high-speed air intakes. Bleed has been efficiently used in supersonic and hypersonic intakes for three primary reasons: to improve the performance of the intake, to reduce the starting Mach number of the intake, and to postpone the onset of buzz oscillations. A bleed system has many characteristics such as the bleed entrance and exit areas, bleed entrance slant angle and position, and bleed type (slot or porous and ram-scoop or flush). Each of these parameters has significant impacts on the intake performance and stability that have been reviewed in this study. In addition, the effectiveness of other flow control methods has been compared with the bleed method.

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