Professor SujithRaman PillaiIndusekharan Nair (R. I. Sujith)

Professor, Department of Aerospace Engineering, Indian Institute ofTechnology, Madras

Areas of Interest:

Thermoacoustic instability; Complex Systems theory; dynamical systems theory.


Combustion Instability; Optical Flow Diagnostics; aerospace propulsion

Consultancy Areas:



Sector Associated With:


Sectors Interested to Offer Service:

Educational / Academic institutions, Industry (Private), Industry (PSUs), R&D Organizations, Government (including funding agencies), Entrepreneurs, Venture Capitalists, Law Enforcement Agencies, Consultancy Firms, Private Agencies, Individuals

Major Professional Contributions:

Sujith showed that the stable operation of a turbulent combustor corresponds to a chaotic state, and it transitions via intermittency to limit cycle oscillations (unstable state). He showed that the combustion noise that occurs during stable operation has a multifractal nature, which is lost at the onset of thermoacoustic instability. He showed that combustion noise can be topologically represented as a scale-free network which transitions to a regular network at the onset of instability. Sujith developed a unified theory for thermoacoustic instability and blowout. These paradigm shifts helped Sujith develop precursors for the onset of thermoacoustic instability and blowout. He discovered the non-normal nature of thermoacoustic systems..

Professional Experience:

  • Lecturer, IIT Madras (1995-1998)
  • Assistant Professor (1998-2004)
  • Associate Professor (2004-2006)
  • Professor (2006-present)
  • Hans Fischer Senior Fellow, TU Munich, Germany (2010-2014)


Thermoacoustic instability; dynamical systems theory, complex systems theory, combustion, acoustics, optical flow and combustion diagnostics; aerospace propulsion.


Contact Information


Department of Aerospace Engineering,
Indian Institute of Technology Madras,
Chennai-600 036
Phone: 044-22574012, 22574000
Fax: 044-22574002, 22570545

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.



  • B.Tech, Aerospace Engineering,1988, Indian Institute ofTechnology, Madras
  • M.S., Aerospace Engineering, 1990, Georgia Institute of Technology
  • PhD.,Aerospace Engineering, 1994, Georgia Institute of Technology


Awards and Major Professional Recognitions

  • Fellow of the Indian Academy of Sciences, Bangalore
  • J. C. Bose Patent award, Received from IIT Madras for Best Patent (2014).
  • IRDA Award, Institute Research and Development Award (Mid career) of IIT Madras (2014)
  • Swarnajayanti Fellowship, DST (2005-2006)
  • Young Engineer Award, Indian National Academy of Engineering (2002), For excellence in engineering research

Link to Website

INAE Section Affiliated VII: Aerospace Engineering

Year of Election to Fellowship: 2008

Year of Birth: 1967