Research

Current areas of research:

Aero-optical properties of transonic boundary layers ans shear layers.
Experimental investigation of large-scale coherent structure in flows and it's effect on a propagating beam degradation.

Usage of different experimental techniques: Malley probe, 2-D wavefront sensor, lenselet array Hartmann sensor.

Dynamics of subsonic jets.
Investigation of large-scale coherent structure in jets, their origin, evolution and related macrophysics. Modelling of large-scale structure in jets. Acoustical radiation.

Usage of different techniques: Wavelet Transform, POD (Proper Orthogonal Decomposition), LSE (Linear Stochastic Estimation)

Recent Publications

• J. Cress, S. Gordeyev, M. Post and E. Jumper "Aero-Optical Measurements in a Turbulent, Subsonic Boundary Layer at Different Elevation Angles", 39th Plasmadynamics and Lasers Conference, Seattle, Washington, 23 - 26 June, 2008, AIAA Paper 2008-4214.
• J. Siegenthaler, E. Jumper and S. Gordeyev, "Atmospheric Propagation Vs. Aero-Optics", 46th Aerospace Science Meeting and Exhibit, Reno, Nevada, 7-10 Jan, 2008, AIAA Paper 2008-1076.
• B. Vucasinovic, A. Glezer,S. Gordeyev, E. Jumper and V. Kibens, Active Control and Optical Diagnostics of the Flow over a Hemispherical Turret", 46th Aerospace Science Meeting and Exhibit, Reno, Nevada, 7-10 Jan, 2008, AIAA Paper 2008-0598.
• J. Cress, S. Gordeyev, E. Jumper, T. Ng and A. Cain, "Similarities and Differences in Aero- Optical Structure over Cylindrical and Hemispherical Turrets with a Flat Window", 45th Aerospace Science Meeting and Exhibit, Reno, Nevada, 8-11 Jan, 2007, AIAA Paper 2007-0326.
• S. Gordeyev, M. Post, T. MacLaughlin, J. Ceniceros and E. Jumper, "Aero-Optical Environment Around a Conformal-Window Turret", AIAA Journal, vol. 45, No. 7, pp. 1514-1524, 2007.
• S. Gordeyev, T. Hayden and E. Jumper, "Aero-Optical and Flow Measurements Over a Flat-Windowed Turret", AIAA Journal, vol. 45, No. 2, pp. 347-357, 2007.
• S. Gordeyev, M. Post, T. MacLaughlin, J. Ceniceros and E. Jumper and J. Trolinger, "Survey of Optical Environment over Hemisphere-on-Cylinder Turret Using Suite of Wavefront Sensors", 37th AIAA Plasmadynamics and Lasers Conference, 5 - 8 Jun 2006, San Francisco, California, AIAA Paper 2006-3074
• S. Gordeyev, E. Jumper and J. Trolinger, "Simulation of Optical Distortions of Two-Dimensional Shear Layer Using Large Structure Model (LSM)", 44th Aerospace Science Meeting and Exhibit, Reno, Nevada, 9-12 Jan, 2006, AIAA Paper 2006-0078.
• A. Buckner, S. Gordeyev and E. Jumper, "Conditional Measurements of Optically-Aberrating Structures in Transonic Attached Boundary Layers", 44th Aerospace Science Meeting and Exhibit, Reno, Nevada, 9-12 Jan, 2006, AIAA Paper 2006-0079.
• S. Gordeyev, E. Jumper, T. Ng and A. Cain, "The Optical Environment of a Cylindrical Turret with a Flat Window and the Impact of Passive Control Devices", 36th AIAA Plasmadynamics and Laser Conference, Toronto, Canada, 6-9 June, 2005, AIAA Paper 2005-4657.
• A. Nightingale, S.Gordeyev, E. Jumper, B. Goodwine and J. Siegenthaler, "Regularizing Shear Layer for Adaptive Optics Control Applications", 36th AIAA Plasmadynamics and Laser Conference, Toronto, Canada, 6-9 June, 2005, AIAA Paper 2005-4774.
• J. Siegenthaler, S. Gordeyev and E. Jumper, "Shear Layers and Aperture Effects for Aero-Optics", 36th AIAA Plasmadynamics and Laser Conference, Toronto, Canada, 6-9 June, 2005, AIAA Paper 2005-4772.
• A, Buckner, S. Gordeyev and E. Jumper, "Optical Aberrations Caused by Transonic Attached Boundary Layers: Underlying Flow Structure", 43nd AIAA Aeroscience Meeting and Exhibit, Reno, Nevada, 10-13 January, 2005, AIAA Paper 2005-0752.
• S. Gordeyev, D. Duffin and E. Jumper, "Aero-Optical Measurements Using Malley Probe and High-Bandwidth 2-D Wavefront Sensor", International Conference on Advanced Optical Diagnostics in Fluids, Solids and Combustion, Tokyo, Japan, 4-6 Dec, 2004.
• "Visualizing Index-of-Refraction Variations in Optically Active Flow Fields" (in pdf format), presented at 11th International Symposium on Flow Visualization, Notre Dame, Indiana, 9-12 Aug, 2004.
• "Comparison of Wavefront Measurement Techniques on a Two-Dimensional Heated Jet" (in pdf format), presented at 35th AIAA Plasmadynamics and Laser Conference, Portland, Oregon, 28 Jun - 1 Jul, 2004.
• "Aero-Optical and Hot-Wire Measurements of the Flow Around the Hemispherical Turret With a Flat Window" (in pdf format), presented at 35th AIAA Plasmadynamics and Laser Conference, Portland, Oregon, 28 Jun - 1 Jul, 2004.
• "Optical Disturbances caused by Transonic Separated Boundary Layer Behind a 20-degree Ramp: Physics and Control" (in pdf format), presented at 42nd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 5-8 January, 2004.
• 'Coherent Structure in the Turbulent Planar Jet': Part 1 (JFM, 2000, v. 414, pp. 145-194) and Part 2 of the paper (in PDF-format), Journal of Fluid Mechanics, 2002, v. 460, pp. 349-380.
• Abstract  and  paper  submitted to the 9th Millenium Symposium on Flow Visualization , Aug, 2000
• Abstract of the lecture accepted to the  20th International Congress of the IUTAM , Aug.-Sep., 2000
• 'Investigation of Coherent Structure in the Similarity Region of the Planar Turbulent Jet Using POD and Wavelet Analysis' - Ph.D Dissertation, July, 1999 (in PDF-format)
•  Current Projects
• All publications
• 'Experimental Investigation of Dynamics of Planar Jet via POD and Wavelet transform' - written candidacy exam, Apr, '98.


Presentations and Abstracts

• Two presentations on the 49th Annual Meeting, Division of Fluid Mechanics of the American Physical Society at Syracuse University, November 24-26, 1996
• Abstract of presentation on the 50th Annual Meeting, Division of Fluid Mechanics of the American Physical Society at San Francisco, November 23-25, 1997. I like APS meetings !
• Abstracts of two presentations (1), (2) on the 51st Annual Meeting, Division of Fluid Mechanics of the American Physical Society at Philadelphia, November 23-24, 1998.
• Abstracts of two presentations (1), (2) on the 52st Annual Meeting, Division of Fluid Mechanics of the American Physical Society at New Orleans, November 21-23, 1999.
• Two presentations on the 53st Annual Meeting, Division of Fluid Mechanics of the American Physical Society at Washington, DC, November 19-21, 2000.

Curriculum Vitae
Publications
Literature Review on POD, LSE and Wavelet Techniques
Here are some applications of POD (Karhunen-Loeve (KL) Decomposition) in different areas other than aerodynamics.
A few links to wavelet related groups.
A brief tutorial of wavelet theory and applications.
Link to POD investigation of basic velocity modes in a circular jet by J. Citriniti.
Visualization of supersonic flow around different bodies by schlieren system

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