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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.2019031311
pages 321-334

LIMB EDGE SYNTHETIC SCHLIEREN OF AEROOPTIC PHENOMENA

Benjamin D. Buckner
Spectabit Optics LLC, Laguna Hills, CA, 92653
Drew L'Esperance
Spectabit Optics LLC, Laguna Hills, CA, 92653

RESUMO

Schlieren imaging of aircraft in flight using photography of the solar limb was first demonstrated in the 1990s, but the technique was relatively cumbersome with the film cameras of the time. The improvement of high-speed digital camera technology and image processing has allowed the development of an improved method for producing schlieren images of aircraft and aerooptic effects, which requires only a simple telescope and a digital video camera. The underlying processing techniques are described along with results from field tests of such a system.

Referências

  1. Bradski, G., The OpenCV Library, Dr. Dobb's J. Software Tools, vol. 25, no. 11, pp. 120, 122-125, 2000.

  2. Haering, E.A., Jr., Bean, P.S., Jones, T.P., Buckner, B.D., and L'Esperance, D.M., Imaging Shockwaves and Vortices on Full-Scale Aircraft using Schlieren Photography with the Sun's Limb from the Ground and from an Aircraft, presented at 17th Int. Symp. on Flow Visualization, Gatlinburg, Tennessee, 2016.

  3. Heineck, J.T., Banks, D.W., Schairer, E.T., Haering, E.A., Jr., and Bean, P.S., Background Oriented Schlieren (BOS) of a Supersonic Aircraft in Flight, AIAA Flight Testing Conf., AIAA Aviation Forum, IAA 2016-3356, Washington, DC, 2016.

  4. Hill, M.A. and Haering, E.A., Jr., Flow Visualization of Aircraft in Flight by Means of Background Oriented Schlieren Using Celestial Objects, 33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conf., AIAA Aviation Forum, AIAA 2017-3553, Denver, Colorado, 2017a. DOI: 10.2514/6.2017-3553.

  5. Hill, M.A. and Haering, E.A., Jr., Ground-to-Air Flow Visualization Using Solar Calcium-K Line Back-ground-Oriented Schlieren, Exp. Fluids, vol. 58, no. 1, 2017b. DOI: 10.1007/s00348-016-2285-7.

  6. Settles, G.S., Schlieren and Shadowgraph Imaging in the Great Outdoors, Proc. of Pacific Symp. on Flow Visualization and Image Processing-2, Honolulu, Hawaii, PF302, 1999.

  7. Settles, G.S., Schlieren and Shadowgraph Techniques, Berlin: Springer-Verlag, 2001.

  8. Weinstein, L.M., An Electronic Schlieren Camera for Aircraft Shock Wave Visualization, 1995 NASA High-Speed Research Program Sonic Boom Workshop, Hampton, VA, CP-3335, pp. 244-258, 1996.

  9. Weinstein, L.M., An Optical Technique for Examining Aircraft Shock Wave Structures in Flight, High-Speed Research: 1994 Sonic Boom Workshop, Hampton, Virginia, NASA CP-3279, 1994.

  10. Weinstein, L.M., Stacy, K., Vieira, G.J., Haering, E.A., Jr., and Bowers, A.H., Imaging Supersonic Aircraft Shock Waves, J. Flow Visualiz. Image Proc., vol. 4, no. 3, pp. 189-199, 1997.