Building: Engineering 1 Building (E1)
Room: 209D
Phone: (312) 567-3554
Fax: (312) 567-3173
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Aeroacoustics Research Group

Degrees

• Doctor of Philosophy in Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio, 1991
  
• Master of Science, Cleveland State University, Cleveland, Ohio, 1986
  
• Bachelor of Technology, Indian Institute of Technology, Bombay, India, 1983

Scientific and Professional Society Memberships

• American Institute of Aeronautics and Astronautics, Associate Fellow
• American Society of Mechanical Engineers, Fellow
• American Physical Society, Division of Fluid Dynamics
• Royal Aeronautical Society, Fellow

Honors and Awards

• Associate Fellow of the American Institute of Aeronautics and Astronautics
• NASA certificate of recognition for the creative development of a technical innovation entitled "Multiple fluidic devices that provide flow mixing control", 1996
• Aeromechanics department paper of the year, 1996
• NYMA/SETAR company best paper of the year, 1996
• Aeromechanics department paper of the year, 1997
• NYMA/SETAR company best paper of the year, 1997

Field of Specialty

Fluid mechanics and aeroacoustics with emphasis on high speed flows and the noise produced by flow interactions, including fundamental experimental investigations of the acoustics, fluid flow physics of supersonic jets, turbulent shear layers, and flow control.

Research Interests

Shear flow control, resonant acoustics and flow induced sound and its suppression; conducting fundamental experimental investigations of the acoustics and fluid flow physics of supersonic jets, developing active flow control devices, and devising active flow control strategies for use in military and civil aircraft. Supersonic jet screech, use of miniature fluidic devices for suppression of resonant acoustics, mixer-ejector aeroacoustics, cavity resonance and its suppression.

Selected Publications

Panickar, P., and Raman, G., "Using Linear Stability Analysis as a Tool to Evaluate Jet and Cavity Flow Control Situations," International Journal of Flow Control, Vol. 1, No. 1 (2009) pp. 43-72.

Raman, G., and Srinivasan, K., "The Powered Resonance Tube: from Hartmann's Discovery to Current Active Flow Control Applications," Progress in Aerospace Sciences, Vol. 45, Nos. 4-5 (2009) pp. 97-123.

Sarpotdar, S., and Raman, G., "Linear Stability of a Hybrid Mean Velocity Profile and its Relevance to Cavity Resonance Suppression," Physics of Fluids (2009) (under review).

Srinivasan, K., Panickar, P., Raman, G., Kim, B.-H., and Williams, D., "Study of Coupled Supersonic Twin Jets of Complex Geometry Using Higher-Order Spectral Analysis," Journal of Sound and Vibration, Vol. 323 (2009) pp. 910-931.

Gregory, J., Sullivan, J., Raman, G., and Raghu, S., "Characterization of the Microfluidic Oscillator," AIAA Journal, Vol. 45, No. 3 (2007) pp. 568-576.

Panickar, P., and Raman, G., "Criteria for the Existence of Helical Instabilities in Subsonic Impinging Jets," Physics of Fluids, Vol. 19 (2007).

Sarpotdar, S., Raman, G., Sharma, S., and Cain, A., "Jet Impingement Tone Suppression Using Powered Resonance Tubes," AIAA Journal, Vol. 45, No. 5 (2007) pp. 972-979.

Tarau, C., Otugen, V., Sheverev, V., Vradis, G., and Raman, G., "The Effect of Thermal Barriers on Sound Wave Propagation," International Journal of Aeroacoustics, Vol. 6, No. 3 (2007) pp. 287-308.

Joshi, R., Panickar, P., Srinivasan, K., and Raman, G., "Nozzle Orientation Effects and Nonlinear Interactions between Twin Jets of Complex Geometry," Journal of Aircraft, Vol. 43, No. 2 (2006) pp. 336-345.

Schmit, R.F., and Raman, G., "High and Low Frequency Actuation Comparison for a Weapons Bay Cavity," International Journal of Aeroacoustics, Vol. 5, No. 4 (2006) pp. 395-414.