Qualification: 
Ph.D
ar_srikrishnan@cb.amrita.edu

Dr. Srikrishnan A. R. pursued his Ph. D. in the field of fuel-air mixing and combustion in supersonic flows as applied to certain advanced aerospace propulsion systems from IIT Madras in 1997.

Prior to joining Amrita, Dr. Srikrishnan headed one of the technical divisions of ANSYS, India as the Director of Development, in their office in Pune. He has sixteen years of experience working with ANSYS, India.

Dr. Srikrishnan has published several technical papers in international journals and in international and national conferences. Publications include papers in the AIAA Journal of Propulsion and Power, Combustion and Flame Journal. His field of interests include Fluid Mechanics, Gas Dynamics, Thermodynamics, Air-breathing Propulsion Systems, Computational Fluid Dynamics (CFD).

Areas of Research

  • Numerical modelling of Heat Transfer
  • Supersonic and Hypersonic flows
  • Vortex formation in liquid tanks
  • Enhancement of Jet Mixing

Funded projects

Title Funding Agency
Studies on the Onset of Coking ISRO
Studies on Effusion Cooling of Gas Turbine Combustors GTRE - DRDO

Publications

Publication Type: Journal Article

Year of Conference Publication Type Title

2017

Journal Article

A. R. Kumar, Nair, R. R., Prabhu, M., and Dr. Srikrishnan A. R., “Vortex Formation during Draining from Cylindrical Tanks: Effect of Drain Port Eccentricity”, Journal of Aerospace Engineering, vol. 30, 2017.[Abstract]


This paper reports an experimental study on the combined effect of drain port eccentricity and port diameter on air core vortex formation in a cylindrical tank with a rotating liquid column. The study is motivated by the need to control air core vortex formation in applications like propellant feed systems of rocket engines. Based on a series of experiments in a water tank with varying discharge port diameter and port eccentricity values, the study shows how the vortex formation can be suppressed using an appropriate combination of diameter and eccentricity of the discharge port. Experiments are carried out over a range of values of initial speed of rotation (60-200 rpm) of the water column. The height of the water column at which the air core vortex extends to the discharge port, is used as a measure of the vortex growth rate. The study proposes a correlation between the critical port diameter (which suppresses vortex formation) and port eccentricity. The intermittency of vortex formation in the eccentric port configuration is also studied using flow visualization. © 2017 American Society of Civil Engineers.

More »»

2016

Journal Article

A. R. Kumar, Joykutty, J., Shaji, R. Korah, and Dr. Srikrishnan A. R., “Vortex Suppression through Drain Port Sizing”, Journal of Aerospace Engineering, vol. 29, no. 4, 2016.[Abstract]


This paper reports on an experimental study motivated by the issue of vortex formation in fuel tanks of liquid propulsion rockets. In this study, vortex funnel (vortex-air core) formation during draining of liquids from cylindrical tanks is suppressed by means of a simple, yet effective method of controlling or adjusting the size of the base drain port. This is particularly relevant in spacecraft and rocket applications where suppression of such vortex-air core is very much warranted because of the possible drain port blockage they cause and the consequent adverse impact (of vortices) on the generation of propulsive thrust. It is found that in the range of rotational speeds provided to the liquid column (between 120 and 200 rpm) in a cylindrical tank, for d/D∼0.03 (where D is the tank diameter held constant in the study, and d is the port diameter that is varied in the experiments), vortex funnel formation is completely eliminated for concentric drain ports. For eccentric ports, this occurs at a slightly higher value of port size, viz., d/D∼0.04. The liquid used is water at room temperature with its free surface open to the atmosphere. More »»

2013

Journal Article

R. Korah Shaji, Gowda, B. H. L., Joshy, P. J., Dr. Srikrishnan A. R., and Kumar, R. A., “Effect Of Relative Drain Port Size On Vortex Formation In Cylindrical Tanks”, International Conference on Fluid Dynamics, 2013.

2004

Journal Article

Dr. Srikrishnan A. R., “Putting Brakes - an analysis of the fundamentals involved in aerobraking”, Article in Times Fluid Power Journal, 2004.

2002

Journal Article

B. Singh Chufal and Dr. Srikrishnan A. R., “CFD Analysis of Film Cooling of a Cylindrical Leading Edge with Compound Angle Injection”, International Conference on Scientific & Engineering Computation, 2002.

1999

Journal Article

Dr. Srikrishnan A. R., Kurian, J., and Sriramulu, V., “Comparative Experimental study of Supersonic Combustors”, Comparative Experimental study of Supersonic Combustors, 1999.

1996

Journal Article

Dr. Srikrishnan A. R., Kurain, J., and Sriramulu, V., “Experimental Study on Mixing Enhancement by Petal Nozzle in Supersonic Flow”, Journal of propulsion and power, vol. 12, pp. 165–169, 1996.

1996

Journal Article

Dr. Srikrishnan A. R., Kurian, J., and Sriramulu, V., “Enhancement of thermal mixing in coaxial supersonic jets”, Journal of propulsion and power, vol. 12, pp. 730–735, 1996.

1996

Journal Article

Dr. Srikrishnan A. R., J., K., and Sriramulu, V., “An Experimental Study of Thermal Mixing and Combustion in Supersonic Flows”, An Experimental Study of Thermal Mixing and Combustion in Supersonic Flows, vol. 107, no. 4, pp. 464-474, 1996.

Publication Type: Conference Paper

Year of Conference Publication Type Title

2014

Conference Paper

U. Viverjita and Dr. Srikrishnan A. R., “Aerothermodynamics of Shock-Boundary Layer Interaction in Hypersonic Flow: A Study on Stagnation Pressure Loss and the Extend of Separation Zone”, in 3rd National Symposium on Shock Waves, IIT Bombay, 2014.

2014

Conference Paper

J. Josy, R. Kumar, A., Dr. Srikrishnan A. R., Shaji, R. K., and .H.L.Gowda, B., “Effect of eccentric drain port size on vortex formation during draining from cylindrical tanks”, in 5th International and 41st National Conference on Fluid Mechanics and Fluid Power (FMFP) 2014, Indian Institute of Technology Kanpur, 2014.

2000

Conference Paper

R. Ch. and Dr. Srikrishnan A. R., “A Numerical Study of Species Mixing in Co-axial Supersonic Jets”, in Annual CFD Symposium, CFD Division of AeSI, 2000.

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2014

Conference Proceedings

U. Viverjita, Dr. Srikrishnan A. R., and , “Laminar and Transitional Shock-Boundary Layer Interaction in Hypersonic Flows: A Study from Energy Perspective”, 5th International Conference on Fluid Mechanics and Fluid Power. IIT Kanpur, 2014.

2014

Conference Proceedings

U. Viverjita, Dinesh, R., Raveesh, R., Sahas, C., and Dr. Srikrishnan A. R., “Studies on Mass-spillage and Stagnation Pressure Loss in Intakes of SCRAMJET Propulsion Systems”, 6th International Conference ICTACEM. IIT Kharagpur, 2014.

2014

Conference Proceedings

V. V., Dr. Srikrishnan A. R., C.P., H., P., P., and N., D., “SCRAMJET Combustion: Studies on Mixing Enhancement and Stagnation Pressure Loss in Supersonic Cavities”, 6th International Conference ICTACEM. IIT Kharagpur, 2014.

2013

Conference Proceedings

Dr. Srikrishnan A. R., “Validation of CFD Software: A Study of Issues Specific to Simulation of High Mach number Flows”, International Conference on CAE. IIT Madras, India, 2013.

2003

Conference Proceedings

S. Dhar and Dr. Srikrishnan A. R., “Numerical Study of Thrust Performance of Supersonic Nozzles with Separated Flow”, 6th Annual CFD Symposium, CFD Division of AeSI. 2003.

1994

Conference Proceedings

Dr. Srikrishnan A. R., J., K., and , “Stagnation Pressure loss associated with Mixing Enhancement in Supersonic Flow”, Proceedings of the 2nd National Conference on Air Breathing Engines and Aerospace Propulsion. VSSC, Thiruvananthapuram, 1994.

1992

Conference Proceedings

Dr. Srikrishnan A. R., K.A., D., and V, S., “Theoretical Investigation of Base Flows and Supersonic External Combustion”, Proceedings of XII National Conference on I.C.Engines and Combustion. pp. 591-596, 1992.

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