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Image analyses of supersonic air-intake buzz and control by natural ventilation

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Abstract

Intake buzz was initiated on a typical two-dimensional supersonic air-intake model at various supersonic Mach numbers up to 3 by gradually changing the back pressure from supercritical to subcritical operating condition in a wind tunnel. Schlieren pictures from a still camera and a high-speed camera were recorded. Analyses of individual high-speed images of the unvented intake were carried out to locate the time-dependent positions and velocities of the ramp shock around the cowl lip. The displacements of the shock indicate sinusoidal oscillations with dominant frequency of 102.4 Hz, close to that obtained from unsteady pressure measurements. Phase trajectories of shock position based on image analyses indicate that the shock oscillations have limit cycle type oscillation, typical of nonlinear dynamic systems. Natural ventilation of the intake was found to be extremely effective in increasing the total pressure recovery, suppress buzz oscillations and in delaying the onset of buzz by preventing the upstream propagation of disturbances through passive bleeding of the internal boundary layer.

Graphical abstract

Effectiveness of natural ventilation in control of air-intake buzz at Mach 3.0

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Abbreviations

θ :

Angular position of butterfly valve (0°—fully open, 90°—fully closed)

M :

Free stream Mach number

A e :

Exit area of the intake

A th :

Throat area of the intake

References

  • Chima RV (2012) Analysis of buzz in a supersonic inlet. NASA TM 2012-217612

  • Dailey CL (1955) Supersonic diffuser instability. J Aeronaut Sci 22(11):733–749

    Article  Google Scholar 

  • Ferri A, Nucci RM (1951) The origin of aerodynamic instability of supersonic inlets at subcritical conditions. NACA RM-L50K30

  • Fisher SA, Neale MC, Brooks AJ (1972) On the sub-critical stability if variable ramp intakes at Mach numbers around 2. ARC R & M 3711

  • Park I-S, Ananthkrishnan N, Tahk MJ, Vineeth CS, Gupta NK (2011) Low-order model for buzz oscillations in the intake of a ramjet engine. J Propuls Power 27(2):503–506

    Article  Google Scholar 

  • Suryanarayana GK (2009) Aerodynamic drag reduction of bluff bodies—application of natural ventilation. Lambert Academic Publishers, Cologne. ISBN 978-3-8383-1103-6

    Google Scholar 

  • Suryanarayana GK (2011) Effect of flare angle and natural ventilation on the aerodynamic characteristics of a typical re-entry body at subsonic and transonic Mach numbers. J Aerosp Sci 63(4):1–7

    Google Scholar 

  • Suryanarayana GK, Meier GEA (1995) Effect of ventilation on the flow-field around a sphere. Exp Fluids 19:78–88

    Article  Google Scholar 

  • Suryanarayana GK, Prabhu A (2000) Effect of natural ventilation on the boundary layer separation and near-wake vortex shedding characteristics of a sphere. Exp Fluids 29:582–591

    Article  Google Scholar 

  • Suryanarayana GK, Pauer H, Meier GEA (1993) Bluff body drag reduction by passive ventilation. Exp Fluids 16:73–81

    Article  Google Scholar 

  • Tanaka N, Mizukaki T (2012) Visualization of unsteady behavior of shock waves around supersonic intake installed in shock tunnel. In: 28th International congress of the aeronautical sciences (ICAS)

  • Trapier S, Deck S, Duveau P (2008) Delayed detached simulation and analysis of supersonic intake buzz. AIAA J 46(1):118–131

    Article  Google Scholar 

Download references

Acknowledgements

The authors acknowledge the in-house research grant awarded by Director, CSIR-NAL for undertaking the present study. Support provided by Prof. K P J Reddy and Prof. G Jagadeesh, Dept. of Aerospace Engineering, Indian Institute of Science, Bangalore in using the high-speed camera is acknowledged. Assistance by Mr. Baburajan in Schlieren visualizations, support from Head, Experimental Aerodynamics Division and technical staff of 0.3 m wind tunnel, particularly from Mr. Periyanagam are acknowledged with thanks.

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Authors and Affiliations

  1. CSIR-National Aerospace Laboratories, Bangalore, 560017, India

    G. K. Suryanarayana & Ritukanchan Dubey

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  1. G. K. Suryanarayana
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  2. Ritukanchan Dubey
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Correspondence to G. K. Suryanarayana.

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Suryanarayana, G.K., Dubey, R. Image analyses of supersonic air-intake buzz and control by natural ventilation. J Vis 20, 711–727 (2017). https://doi.org/10.1007/s12650-017-0420-z

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  • DOI: https://doi.org/10.1007/s12650-017-0420-z

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