Aeroacoustic Evaluation of a Simplified Weapon Bay under Transonic Conditions with Doors Oriented at Various Locations
Keywords:
Cavity Flow, Weapon Bay, Compressible Flow, Aeroacoustics, OpenFOAMAbstract
In this paper, a simplified transonic weapon bay with a L/D=5 and Mach number 0.85 was considered using the large-eddy simulation (LES) with dynamic kinetic energy subgrid-scale (SGS) model. The M219 geometry has been analyzed using OpenFOAM for three different configurations based on the position of the covers. The obtained results have been validated against reference studies and presented in terms of mean streamwise velocity profile, overall sound pressure level, sound pressure level and band-integrated sound pressure level in both spatial and frequency domains. In order to mitigate the high computational cost associated with acoustic analysis, a Cartesian mesh topology has been employed as an alternative approach. The numerical findings have demonstrated a comparable level of accuracy to simulations conducted with high-cell count meshes. Based on these findings, a cavity analysis has been conducted for the configuration with covers positioned at a position of 45°.
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References
M. J. Lighthill and P. R. S. L. A, On sound generated aerodynamically I. General theory, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 211(1107), pp. 564–587, (1952).
S. J. Lawson and G. N. Barakos, Review of numerical simulations for high-speed, turbulent cavity flows, Progress in Aerospace Sciences 47(3), pp. 186–216, (2011).
M. B. Tracy, E. B. Plentovich, and R. J. Stallings, Experimental cavity pressure measurements at subsonic and transonic speeds, Nasa Technical Paper, 3358(132), (1993).
P. Nayyar, CFD Analysis of Transonic Turbulent Cavity Flows, University of Glasgow, (2005).
J. Rossiter, Wind-tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds, Royal Aircraft Establishment, TR 64037, (1964).
L. N. Cattafesta, Q. Song, D. R. Williams, C. W. Rowley, and F. S. Alvi, Active control of flow-induced cavity oscillations, Progress in Aerospace Sciences, 44(7–8), pp. 479–502, (2008).
P. Jain and A. Vaidyanathan, Aero-acoustic feedback mechanisms in supersonic cavity flow with subcavity, Physics of Fluids, 33(12), (2021).
S. J. Lawson and G. N. Barakos, Assessment of passive flow control for transonic cavity flow using detached-eddy simulation, Journal of Aircraft, 46(3), pp. 1009–1029, (2009).
E. B. Plentovich and M. B. Tracy, Characterization of cavity flow fields using pressure data obtained in the Langley 0.3-Meter Transonic Cryogenic Tunnel, National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program., 4436, (1993).
K. Atvars, K. Knowles, S. A. Ritchie, and N. J. Lawson, Experimental and computational investigation of an ‘open’ transonic cavity flow, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 223(4), pp. 357–368, (2009).
N. Zhuang, F. S. Alvi, M. B. Alkislar, and C. Shih, Supersonic cavity flows and their control, AIAA Journal, 44(9), pp. 2118–2128, (2006).
D. Nightingale, J. Ross, and G. Foster, Cavity unsteady pressure measurements— examples from wind-tunnel tests, Aerodynamics & Aeromechanics Systems Group, Technical Report Version 3, QinetiQ, (2005).
J. A. Ross and J. W. Peto, The effect of cavity shaping, front spoilers and ceiling bleed on loads acting on stores, and on the unsteady environment within weapon bays, Royal Aircraft Establishment TR 2233, (1997).
M. J. de C. Henshaw, M219 cavity case: Verification and validation data for computational unsteady aerodynamics, Tech. Rep. RTO-TR-26, AC/323(AVT)TP/19, pp. 453–472, (2002).
D. F. Long, Spatial structure of cavity pressure fluctuations at transonic speeds, AIAA Journal, 44(9), pp. 1983–1992, (2006).
L. Shaw, R. Clark, and D. Talmadge, F-111 generic weapons bay acoustic environment, Journal of Aircraft, 25(2), pp. 147–153, (1988).
O. Baysal and R. L. Stallings, Computational and experimental investigation of cavity flowfields, AIAA Journal, 26(1), pp. 6–7, (1988).
R. A. Chaplin, T. J. Birch, and D. Science, The aero-acoustic environment within the weapons bay of a generic UCAV, in 30th AIAA Applied Aerodynamics Conference, June 25-28, 2012, New Orleans, LA, AIAA-2012-3338.
C. Y. Huang, C. Y. Yeh, Y. F. Lin, and K. M. Chung, Global flow visualization of transonic cavity flow with various yaw angles, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 235(13), pp. 1751–1762, (2021).
R. Allen, F. Mendonça, and D. Kirkham, RANS and DES Turbulence Model Predictions of Noise on the M219 Cavity at M=0.85, International Journal of Aeroacoustics, 4(1–2), pp. 135–151, (2005).
S. V. Babu, G. Zografakis, G. N. Barakos, and A. Kusyumov, Evaluation of scale-adaptive simulation for transonic cavity flows, International Journal of Engineering Systems Modelling and Simulation, 8(2), pp. 106–124, (2016).
S. V. Babu, G. J. M. Loupy, F. Dehaeze, G. N. Barakos, and N. J. Taylor, Aeroelastic simulations of stores in weapon bays using Detached-Eddy Simulation, Journal of Fluids and Structures, 66(207–228), (2016).
A. M. Lamp and N. Chokani, Computation of Cavity Flows with Suppression Using Jet Blowing, Journal of Aircraft, 34(4), pp. 545–551, (1997).
G. N. Barakos, S. J. Lawson, R. Steijl, and P. Nayyar, Numerical simulations of high-speed turbulent cavity flows, Flow, Turbulence and Combustion, 83(4), pp. 569–585, (2009).
G. J. M. Loupy and G. N. Barakos, Processing and analysis methods for transonic cavity flow, Physics of Fluids, 29(7), (2017).
D. Bacci and A. J. Saddington, Hilbert–Huang Spectral Analysis of Cavity Flows Incorporating Fluidic Spoilers, AIAA Journal, 61(1), pp. 271–284, (2023).
P. Cui, G. Zhou, Y. Zhang, H. Jia, X. Wu, M. Ma, H. Li, and B. Chen, Improved Delayed Detached-Eddy Investigations on the Flow Control of the Leading-Edge Flat Spoiler of the Cavity in the Lover weapons-bay geometries, Journal of Aircraft, 47(5), pp. 1605–1623, (2010).
S. J. Lawson and G. N. Barakos, Influence of stores on the flow inside UCAV weapon bays, Aeronautical Journal, 116(1176), pp. 199–215, (2012).
E. F. Sheta, R. E. Harris, B. George, L. Ukeiley, and E. Luke, Loads and Acoustics Prediction on Deployed Weapons Bay Doors, Journal of Vibration and Acoustics, Transactions of the ASME, 139(3), (2017).
G. N. Barakos, S. J. Lawson, R. Steijl, and P. Nayyar, Assessment of Flow Control Devices for Transonic Cavity Flows Using DES and LES, IUTAM Bookseries, 14(77–87), (2009).
P. Nayyar, G. N. Barakos, K. J. Badcock, and D. A. Kirkham, Analysis and control of transonic cavity flow using DES and LES, 35th AIAA Fluid Dynamics Conference and Exhibit, Toronto, Ontario, June 6-9, 2005
A. Leonard, Energy cascade in large-eddy simulations of turbulent fluid flows, Advances in Geophysics, 18(237–248), (1975).
W. W. Kim and S. Menon, Application of the localized dynamic subgrid-scale model to turbulent wall-bounded flows, 35th Aerospace Sciences Meeting and Exhibit, Nevada, January, pp. 1–12, (1997).
L. Vanco and A. D. Pierce, Acoustics: An Introduction to Its Physical Principles and Applications, 22(2). (1998).
H. H. Heller, D. G. Holmes, and E. E. Covert, Flow-induced pressure oscillations in shallow cavities, Journal of Sound and Vibration, 18(4), pp. 545–553, (1971).
J. C. R. Hunt, a a Wray, and P. Moin, Eddies, streams, and convergence zones in turbulent flows, Center for Turbulence Research, Proceedings of the Summer Program, no. 1970, pp. 193–208, (1988).
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