Qualification: 
M.E
s_prabhu1@cb.amrita.edu

Mr. Prabhu S. received his M. E. in Internal Combustion Engineering from College of Engineering, Guindy, Anna University, Chennai. His professional experience includes working as a Project Manager at TATA chemicals limited and Computational Engineer at General Electric-Aviation. His area of interest includes Internal Combustion Engines, Gas Turbines, Emission Modeling, Direct Numerical Simulation, Machine Learning. He joined Amrita School of Engineering in June 2018 and currently working as Assistant Professor.

Research Expertise

My research interest is to investigate the sensitivity of the soot formation rate to various chemical pathways for large polycyclic aromatic hydrocarbons. The process involves a systematic reduction of the reaction mechanisms for efficient flame simulations, description of soot aerosol model based on statistical approaches, and high fidelity simulations of laminar and turbulent flames.

Publications

Publication Type: Conference Paper

Year of Publication Publication Type Title

2017

Conference Paper

Prabhu S. and Hong G. Im, “A computational study of soot formation in opposed-flow diffusion flame interacting with vortices”, in 55th AIAA Aerospace Sciences Meeting, Dallas, Texas, 2017.

2016

Conference Paper

Prabhu S., Arias, P. G., Lee, B. J., Wang, Y., Gao, Y., Park, S., Sarathy, M., Chung, S. H., Lu, T., and Im, H. G., “Effects of Large Polycyclic Aromatic Hydrocarbons on the Soot Formation in Premixed Flames – ISF Data Comparison”, in 3rd International Sooting Flame (ISF) Workshop, Seoul, South Korea, 2016.

2015

Conference Paper

Prabhu S., Arias, P. G., Wang, Y., Gao, Y., Park, S., Im, H. G., S Sarathy, M., Chung, S. - H., and Lu, T., “Effects of Large Polycyclic Aromatic Hydrocarbons on the Soot Formation in Ethylene-Air Nonpremixed Flames”, in Proceedings of the European Combustion Meeting 2015, 2015.[Abstract]


This study presents updated comprehensive gas-phase kinetic mechanism and aerosol models to predict soot formation characteristics
in ethylene-air nonpremixed flames. A main objective is to investigate the sensitivity of the soot formation rate to various chemical
pathways for large polycyclic aromatic hydrocarbons (PAH). In this study, the detailed chemical mechanism was reduced from
397 to 99 species using directed relation graph (DRG) and sensitivity analysis. The method of moments with interpolative closure
(MOMIC) was employed for the soot aerosol model. Counterflow nonpremixed flames of pure ethylene at low strain rate sooting
conditions are considered, for which the sensitivity of soot formation characteristics with respect to hetrogeneous nucleation is
investigated. Results show that higher PAH concentrations result in higher soot nucleation rate, and that the average size of the
particles are in good agreement with experimental results. It is found that the nucleation processes (i.e., soot inception) from higher
PAH precursors, coronene in particular, is critical for accurate prediction of the overall soot formation.

More »»

2014

Conference Paper

Prabhu S., Arias, P. G., Gao, Y., Park, S., Im, H. G., Sarathy, S. M., and Lu, T., “A Numerical Study on the Sensitivity of Larger Polycyclic Aromatic Hydrocarbons in Nucleation Processes of Sooting Flames”, in 35th International Symposium of Combustion, Work-in-Progress Poster W4P131, San Francisco, CA., 2014.

Publication Type: Journal Article

Year of Publication Publication Type Title

2016

Journal Article

Prabhu S., Arias, P. G., Lee, B. Jik, Im, H. G., Wang, Y., Gao, Y., Park, S., S. Sarathy, M., Lu, T., and Chung, S. Ho, “A computational study of ethylene–air sooting flames: Effects of large polycyclic aromatic hydrocarbons”, Combustion and Flame, vol. 163, pp. 427 - 436, 2016.[Abstract]


An updated reduced gas-phase kinetic mechanism was developed and integrated with aerosol models to predict soot formation characteristics in ethylene nonpremixed and premixed flames. A primary objective is to investigate the sensitivity of the soot formation to various chemical pathways for large polycyclic aromatic hydrocarbons (PAH). The gas-phase chemical mechanism adopted the KAUST-Aramco PAH Mech 1.0, which utilized the AramcoMech 1.3 for gas-phase reactions validated for up to C2 fuels. In addition, PAH species up to coronene (C24H12 or A7) were included to describe the detailed formation pathways of soot precursors. In this study, the detailed chemical mechanism was reduced from 397 to 99 species using directed relation graph with expert knowledge (DRG-X) and sensitivity analysis. The method of moments with interpolative closure (MOMIC) was employed for the soot aerosol model. Counterflow nonpremixed flames at low strain rate sooting conditions were considered, for which the sensitivity of soot formation characteristics to different nucleation pathways were investigated. Premixed flame experiment data at different equivalence ratios were also used for validation. The findings show that higher PAH concentrations result in a higher soot nucleation rate, and that the total soot volume and average size of the particles are predicted in good agreement with experimental results. Subsequently, the effects of different pathways, with respect to pyrene- or coronene-based nucleation models, on the net soot formation rate were analyzed. It was found that the nucleation processes (i.e., soot inception) are sensitive to the choice of PAH precursors, and consideration of higher PAH species beyond pyrene is critical for accurate prediction of the overall soot formation.

More »»

2015

Journal Article

S. T. Chong, Raman, V., Mueller, M. E., Prabhu S., and Im, H. G., “Effect of soot model, moment method, and chemical kinetics on soot formation in a model aircraft combustor”, Proceedings of the Combustion Institute, 2015.