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The Flow Field Structures of In-lined Double Jet-in-Cross Flow at Low Velocity Ratio
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 Title & Authors
The Flow Field Structures of In-lined Double Jet-in-Cross Flow at Low Velocity Ratio
Lee, Ki-Young;
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The flow field structures of dual jet-in-cross-flow were examined experimentally for in-lined perforated damage holes configuration using particle image velocimetry. Ensemble averaged in-plane velocity and vorticity data in the jet were determined to study the mean jet structure. Jets are formed by pressure differences between upper and lower airfoil surface. The flow structure of vicinity of the thru holes consist of a vortical structure that wrap around the jets like a horseshoe and develop further downstream through a pair of stream-wise vortices. The shape, size and location of the horseshoe vortex were found to be dependent on the angle of attack. In spite of the existence of battle damage holes, the effect on the control force was insignificant when the damage size was not large enough.
Battle Damaged Hole;Jet-in-Crossflow;In-lined Dual Jet;Particle Image Velocimetry(PIV);Horseshoe Vortex;
 Cited by
Kutschera, A., and Render, P. M., "Advanced Combat Aircraft Performance Assessment," Aeronautical Journal, Vol. 106, No. 8, pp. 443-451, 2002.

Atkinson, D. B., and Ball, R. E., "A History of the Survivability Design of Military Aircraft," AIAA Paper 95-1421, 1995.

Robinson, K. W., and Leishman, J. G., "Effects of Ballistic Damage on the Aerodynamics of Helicopter Rotor Airfoils," Journal of Aircraft, Vol. 35, No. 5, pp. 695-703, 1998. crossref(new window)

Leishman, J. G., "Principles of Helicopter Aerodynamics," Cambridge University Press, 2006.

Cardenas, C., Suntz, R., Denev, J. A., and Bockhorn, H., "Two-dimensional Estimation of Reynolds-fluxes and Stresses in a Jet-in-Crossflow Arrangement by Simultaneous 2D-LIF and PIV," Appl. Phys. B, Vol. 88, pp. 581-591, 2007. crossref(new window)

New, T. H., Lim, T. T., and Luo, S. C., "A Flow Field Study of an Elliptic Jet in Cross Flow Using DPIV Technique," Experiments in Fluids, Vol. 36, pp. 604-618, 2004. crossref(new window)

Schetz, J. A., Jakubowski, A. K., and Aoyagi, K., "Surface Pressures on a Flat Plate with Dual Jet Configuration," J. Aircraft, Vol. 21, No. 7, pp. 484-490, 1984. crossref(new window)

Schetz, J. A., Jakubowski, A. K., and Aoyagi, K., "Jet Trajectories and Surface Pressures Induced on a Body of Revolution with Various Dual Jet Configuration," J. Aircraft, Vol. 20, No. 11, pp. 975-982, 1983. crossref(new window)

Iwin, A. J. and Render, P. M., "The Influence of Mid-Chord Battle Damage on the Aerodynamic Characteristics of Two-Dimensional Wings," Aeronautical Journal, Vol. 103, No. 1033, pp. 153-161, 2000.

Fric, T. F., and Roshko, A., "Vortical Structure in the Wake of a Transverse Jet," J. Fluid Mech., Vol. 279, pp. 1-49, 1994. crossref(new window)

Render, P. M., and Walton, A. J., "Aerodynamics of Battle Damaged Wings-the Influence of Flaps, Camber and Repair Schemes," AIAA Paper 2005-4721, 2005.

Barlow, J. B., Rae, W. H., and Pope, "A., Low-Speed Wind Tunnel Method," John Wiley & Sons Inc., New York, pp. 368-385, 1999.

Lee, K., "The Flow Structure of Jet-in-Cross Flow through the Perforated Damage Hole," Journal of the Korea Institute of Military Science and Technology, Vol. 17, No. 4, pp. 551-559, 2014. crossref(new window)

Lee, K. Y., and Chung, H. S., "Aerodynamic Characteristics of NACA 0012 with Circular Damage Hole," The 7th JSME-KSME Thermal & Fluids Engineering Conference, 2008.