Ramgopal Sampath, Ph.D.

Alumni

Postdoctoral Fellow

Research Interest

Research interests include turbulent spray combustion at atmospheric and high pressures. In addition, it includes understanding the physics of thermocoustic instabilities in a backward facing step, bluff body combustors and its interactions with hydrodynamic oscillations with focus on intermittent oscillations aimed at its control. Measurements based on Laser based diagnostics such as 2C-, 3C- and time resolved PIV, PLIF, LII and LDV/PDPA of the reacting and non-reacting flows. Application of spatio-temporal data processing tools such as Proper orthogonal decomposition (POD) and dynamic mode decomposition methods (DMD), Lagrangian Coherent structures (LCS) to the spatio-temporal data, linear/non-linear signal analysis and dynamical system based time series analysis.

Selected Publications

  • Proper orthogonal and dynamic mode decomposition of time-resolved PIV of confined backward-facing step flow
    R. Sampath, and S.R. Chakravarthy
    Experiments in Fluids 55, 1792-1808, (2014)
  • Dynamics and diagnostics of flame-acoustic interactions
    S.R. Chakravarthy, R. Sampath and V. Ramanan
    Combustion Science and Technology 189, 395-437, (2015)
  • Investigation of combustion oscillations of premixed dump combustor using Time-resolved particle image velocimetry
    R. Sampath, and S.R. Chakravarthy
    Combustion and Flame 172,309325, (2016)
  • Lagrangian coherent structures during combustion instability in a premixed-flame backward-step combustor
    R. Sampath, M. Mathur, and S.R. Chakravarthy
    Physical Review E 94, 062209, (2016)
  • Acoustic Reynolds stress: The source of coherent structures during combustion instability
    C. Balaji, A. Kannan, R. Sampath, and S.R. Chakravarthy
    Part III-Combustion of Fuels and Engine Performance, in Agarwal, A.K., Pandey, A..., (2014) 

Education

 

  • ​Ph.D. (M.S integrated), Aerospace Engg., Indian Institute of Technology, Madras, India, 2017
  • B.E., Mechanical Engg., MNM Jain Engg. college (Affl. Anna University), Chennai, India, 2007

Professional Profile

  • 2017-Present: Postdoctoral Fellow, King Abdullah University of Science and Technology, KAUST
  • ​2016-2017: Senior Project officer, National Centre for Combustion Research and Development (NCCRD) and Centre of Propulsion Technology (CoPT), IIT Madras, India

KAUST Affiliations

  • Clean Combustion Research Center (CCRC)
  • Division of Physical Sciences and Engineering (PSE)

Research Interests Keywords

Turbulent combustion Thermo acoustic instabilities PIV PLIF intermittent oscillations hydrodynamic instabilities flame stabilization time series analysis Proper orthogonal decomposition dynamic mode decomposition Lagrangian coherent structures wavelet analysis