Publications

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Scopus

Publons

Peer reviewed journal publications

1. Mohan, B., Badra, J., Sim, J., Im, H.G., 2020. Coupled in-nozzle flow and spray simulation of Engine CombustionNetwork (ECN) Spray-G injector. International Journal Engine Research journal. (just accepted)
2. Du, J., Mohan, B., Sim, J., Fang, T., Chang, J., Roberts, W.L., 2020 Influence of flash boiling on spray morphologyusing a prototype injector for gasoline compression ignition (GCI) application. Atomization and Sprays. (just accepted)
3. Du, J., Zang, G., Mohan, B., Idoughi, R., Sim, J., Fang, T., Wonka, P., Heidrich, Roberts, W.L., 2020. Study of spray structure from non-flash to flash boiling conditions with space-time tomography. Proceedings of theCombustion Institute. (in press)
4. Du, J., Mohan, B., Sim, J., Fang, T., Chang, J., Roberts, W.L., 2020. A comprehensive study of spray and combustioncharacteristics of a prototype injector for gasoline compression ignition (GCI) application. Fuel. pp. 118144.
5. Mohapatra, C.K., Schmidt, D.P., Sforozo, B.A., Matusik, K.E., Yue, Z., Powell, C.F., Som, S., Mohan, B., Im H.G., Badra, J., Bode, M., Pitsch, H., Papoulias, D., Neroorkar, K., Muzaferija, S., Marti-Aldaravi, P., Martinez, M., 2020. Collaborative investigation of the internal flow and near-nozzle flow of an eight-hole gasolineinjector (Engine Combustion Network Spray G). International Journal of Engine Research.
6. Du, J., Mohan, B., Sim, J., Fang, T., Roberts, W.L., 2019. Auto-ignition characteristics of high-reactivity gasoline fuel using a gasoline multi-hole injector. Experimental Thermal and Fluid Science, 112, pp. 109993.
7. Du, J., Mohan, B., Sim, J., Fang, T., Roberts, W.L., 2019. Study of spray collapse phenomenon at flash boiling conditions using simultaneous front and side view imaging. International journal of Heat and Mass Transfer, 147, pp. 118824.
8. Du, J., Mohan, B., Sim, J., Fang, T., Roberts, W.L., 2019. Experimental and analytical study on liquid and vapor penetration of high-reactivity gasoline using a high-pressure gasoline multi-hole injector. Applied Thermal Engineering, 163, pp. 114187.
9. Du, J., Mohan, B., Sim, J., Fang, T., Roberts, W.L., 2019. Macroscopic non-reacting spray characterization of gasoline compression ignition fuels in a constant volume chamber. Fuel, 255, pp. 115818.
10. Li, Y., Alfazazi, A., Mohan, B., Tingas, E.A., Badra, J., Im, H., Sarathy, 2018. M. Development of a reduced four-component (toluene/n-heptane/iso-octane/ethanol) gasoline surrogate model. Fuel, 247, pp. 164-178.
11. Mohan, B., Du, J., Sim, J. and Roberts, W.L., 2018. Hydraulic characterization of high-pressure gasoline multi-hole injector. Flow Measurement and Instrumentation, 64, pp.133-141.
12. Cui, X., Mohan, B., Islam, M.R. and Chua, K.J., 2017. Investigating the energy performance of an air treatment incorporated cooling system for hot and humid climate. Energy and Buildings, 151, pp.217-227.
13. Tay, K.L., Yang, W., Zhao, F., Yu, W. and Mohan, B., 2017. A numerical study on the effects of boot injection rate-shapes on the combustion and emissions of a kerosene-diesel fueled direct injection compression ignition engine. Fuel, 203, pp.430-444.
14. Ridgway, H.F., Mohan, B., Cui, X., Chua, K.J. and Islam, M.R., 2017. Molecular dynamics simulation of gas-phase ozone reactions with sabinene and benzene. Journal of Molecular Graphics and Modelling, 74, pp.241-250.
15. Tay, K.L., Yang, W., Li, J., Zhou, D., Yu, W., Zhao, F., Chou, S.K. and Mohan, B., 2017. Numerical investigation on the combustion and emissions of a kerosene-diesel fueled compression ignition engine assisted by ammonia fumigation. Applied energy, 204, pp.1476-1488.
16. Cui, X., Mohan, B., Islam, M.R., Chou, S.K. and Chua, K.J., 2017. Energy performance evaluation and application of an air treatment system for conditioning building spaces in tropics. Applied energy, 204, pp.1500-1512.
17. Tay, K.L., Yang, W., Zhao, F., Yu, W. and Mohan, B., 2017. Numerical investigation on the combined effects of varying piston bowl geometries and ramp injection rate-shapes on the combustion characteristics of a kerosene-diesel fueled direct injection compression ignition engine. Energy conversion and management, 136, pp.1-10.
18. Yu, W., Yang, W., Zhao, F., Zhou, D., Tay, K. and Mohan, B., 2017. Development of a three-step hybrid simulation approach (THSA) for engine combustion investigation coupled with a multistep phenomenon soot model and energy balance analysis. Applied energy, 185, pp.482-496.
19. Tay, K.L., Yang, W., Zhao, F., Yu, W. and Mohan, B., 2017. Effects of triangular and ramp injection rate-shapes on the performance and emissions of a kerosene-diesel fueled direct injection compression ignition engine: A numerical study. Applied Thermal Engineering, 110, pp.1401-1410.
20. Cui, X., Islam, M.R., Mohan, B. and Chua, K.J., 2016. Developing a performance correlation for counter-flow regenerative indirect evaporative heat exchangers with experimental validation. Applied Thermal Engineering, 108, pp.774-784.
21. Tay, K.L., Yang, W., Mohan, B., Zhou, D., Yu, W. and Zhao, F., 2016. Development of a reduced kerosene–diesel reaction mechanism with embedded soot chemistry for diesel engines. Fuel, 181, pp.926-934.
22. Yu, W., Yang, W., Tay, K., Mohan, B., Zhao, F. and Zhang, Y., 2016. Macroscopic spray characteristics of kerosene and diesel based on two different piezoelectric and solenoid injectors. Experimental Thermal and Fluid Science, 76, pp.12-23.
23. Mohan, B., Yang, W., Yu, W. and Tay, K.L., 2017. Numerical analysis of spray characteristics of dimethyl ether and diethyl ether fuel. Applied energy, 185, pp.1403-1410.
24. Yu, W., Yang, W., Mohan, B., Tay, K.L. and Zhao, F., 2017. Macroscopic spray characteristics of wide distillation fuel (WDF). Applied energy, 185, pp.1372-1382.
25. Cui, X., Islam, M.R., Mohan, B. and Chua, K.J., 2016. Theoretical analysis of a liquid desiccant based indirect evaporative cooling system. Energy, 95, pp.303-312.
26. Tay, K.L., Yang, W., Mohan, B., An, H., Zhou, D. and Yu, W., 2016. Development of a robust and compact kerosene–diesel reaction mechanism for diesel engines. Energy conversion and management, 108, pp.446-458.
27. Mohan, B., Yang, W., Yu, W., Tay, K.L. and Chou, S.K., 2015. Numerical investigation on the effects of injection rate shaping on combustion and emission characteristics of biodiesel fueled CI engine. Applied Energy, 160, pp.737-745.
28. Mohan, B., Tay, K.L., Yang, W. and Chua, K.J., 2015. Development of a skeletal multi-component fuel reaction mechanism based on decoupling methodology. Energy conversion and management, 105, pp.1223-1238.
29. Mohan, B., Yang, W., Tay, K.L. and Yu, W., 2014. Experimental study of spray characteristics of biodiesel derived from waste cooking oil. Energy conversion and management, 88, pp.622-632.
30. Mohan, B., Puqing, J., Sasmito, A.P., Kurnia, J.C., Jangam, S.V. and Mujumdar, A.S., 2014. Energy-Efficient Novel Heterogeneous Gaseous T-Junction Microreactor Design Utilizing Inlet Flow Pulsation. Industrial & Engineering Chemistry Research, 53(49), pp.18699-18710.
31. Mohan, B., Yang, W., Tay, K.L. and Yu, W., 2014. Macroscopic spray characterization under high ambient density conditions. Experimental Thermal and Fluid Science, 59, pp.109-117.
32. Mohan, B., Yang, W., Raman, V., Sivasankaralingam, V. and Chou, S.K., 2014. Optimization of biodiesel fueled engine to meet emission standards through varying nozzle opening pressure and static injection timing. Applied energy, 130, pp.450-457.
33. Mohan, B., Yang, W. and Yu, W., 2014. Effect of internal nozzle flow and thermo-physical properties on spray characteristics of methyl esters. Applied energy, 129, pp.123-134.
34. Mohan, B., Yang, W. and Chou, S., 2014. Cavitation in injector nozzle holes–a parametric study. Engineering Applications of Computational Fluid Mechanics, 8(1), pp.70-81.
35. Mohan, B., Yang, W. and kiang Chou, S., 2014. Development of an accurate cavitation coupled spray model for diesel engine simulation. Energy conversion and management, 77, pp.269-277.
36. Mohan, B., Yang, W. and kiang Chou, S., 2013. Fuel injection strategies for performance improvement and emissions reduction in compression ignition engines—A review. Renewable and Sustainable Energy Reviews, 28, pp.664-676.
37. Yang, W.M., An, H., Chou, S.K., Chua, K.J., Mohan, B., Sivasankaralingam, V., Raman, V., Maghbouli, A. and Li, J., 2013. Impact of emulsion fuel with nano-organic additives on the performance of diesel engine. Applied energy, 112, pp.1206-1212.
38. Yang, W.M., An, H., Chou, S.K., Vedharaji, S., Vallinagam, R., Balaji, M., Mohammad, F.E.A. and Chua, K.J.E., 2013. Emulsion fuel with novel nano-organic additives for diesel engine application. Fuel, 104, pp.726-731.

Peer Reviewed Conference Proceedings

1. Sanal, S., Mohan, B., Perez, F.E.H., Im, H.G. Numerical study on spray characteristics of methanol under vaporizing and non-reacting condition. (Abstract accepted for 2019 Asia-Pacific Conference on Combustion (ASPACC), Fukuoka, Japan.) (Oral presentation)
2. Li, Y., Alfazazi, A., Mohan, B., Sarathy, M., Badra, J. Development of a 4-Component (iso-Octane/n-Heptane/Toluene/Ethanol) Reduced Gasoline Surrogate Model under Engine Conditions. SAE 2019 World Congress and Exhibition, Detroit, USA. (Only oral presentation)
3. Du, J., Mohan, B., Sim, J., Chang, J., Fang, T., Roberts, W.L. Study of flash boiling in a multi-hole gasoline injector. JSAE/ SAE 2019 Powertrains, Fuels and Lubricants, Kyoto, Japan. (Oral presentation)
4. Du, J., Mohan, B., Sim, J., Fang, T., Roberts, W.L. Spray ignition charcacteristics of low octane gasoline using a gasoline multi-hole injector. 11th Mediterranean Combustion Symposium MCS Tenerife, Spain, Portugal. (Oral presentation)
5. Zhou, Q., Ali, M.J.M., Mohan, B., Lu, X.C. and Im, H., 2018. A Computational Study of Lean Limit Extension of Alcohol HCCI Engines (2018-01-1679). SAE Technical Paper. (Oral presentation)
6. Jaasim, M., Atef, N., Mohan, B., Sow, A., Pérez, F.E.H., Badra, J., Sim, J., Sarathy, S.M., Im, H.G. A comprehensive engine study: from surrogate chemistry formulation to engine simulations. THIESEL 2018 Conference on Thermo and Fluid Dynamic Processes in Direct Injection Engines, valencia, Spain. (Oral presentation)
7. Du, J., Mohan, B., Sim, J., Roberts, W.L. Experimental study on the non-reacting spray characterization of gasoline compression ignition fuel. 10th International Conference on Applied Energy - ICAE 2018, Hong Kong. (DOI: 10.1016/j.egypro.2019.01.453.) (Oral presentation)
8. Mohan, B., Jaasim, M., Perez, F.H., Sim, J., Roberts, W. and Im, H., 2018. Internal and Near Nozzle Flow Simulations of Gasoline Multi-Hole Injector (ECN Spray G) with Transient Needle Motion. 10th International Symposium on Cavitation (CAV2018). ASME Press. (Oral presentation)
9. Mohan, B., Ali, M.J.M., Ahmed, A., Perez, F.H., Sim, J., Roberts, W., Sarathy, M. and Im, H., 2018. Numerical Simulations of High Reactivity Gasoline Fuel Sprays under Vaporizing and Reactive Conditions (2018-01-0292). SAE Technical Paper. (Oral presentation)
10. Cui, X., Mohan, B., Islam, M.R., Chou, S.K. and Chua, K.J., 2017. Investigation on a combined air treatment process for air-conditioning system. Energy Procedia, 142, pp.1874-1879. (Oral presentation)
11. Cui, X., Mohan, B., Islam, M.R., Chou, S.K. and Chua, K.J., 2017. Energy saving potential of an air treatment system for improved building indoor air quality in Singapore. Energy Procedia, 143, pp.283-288. (Oral presentation)
12. Mohan, B., Cui, X. and Chua, K.J., 2017. Development of chemical reaction kinetics of VOC ozonation. Procedia engineering, 180, pp.1372-1378. (Oral presentation)
13. Cui, X., Mohan, B., Islam, M.R. and Chua, K.J., 2017. Modelling and performance evaluation of an air handling unit for an air treatment system with regulated outdoor-air fraction. Energy Procedia, 105, pp.4718-4723. (Oral presentation)
14. Tay, K.L., Yang, W., Chou, S.K., Zhou, D., Li, J., Yu, W., Zhao, F. and Mohan, B., 2017. Effects of injection timing and pilot fuel on the combustion of a kerosene-diesel/ammonia dual fuel engine: a numerical study. Energy Procedia, 105, pp.4621-4626. (Oral presentation)
15. Yu, W., Yang, W., Mohan, B., Tay, K., Zhao, F., Zhang, Y., Chou, S., Kraft, M., Alexander, M.A., Yong, A. and Lou, K., 2016. Numerical and Experimental Study on Internal Nozzle Flow and Macroscopic Spray Characteristics of a Kind of Wide Distillation Fuel (WDF)-Kerosene (2016-01-0839). SAE Technical Paper. (Oral presentation)
16. Mohan, B., Yang, W., Yu, W., Tay, K.L. and Chou, S.K., 2015. Numerical simulation on spray characteristics of ether fuels. Energy Procedia, 75, pp.919-924. (Oral presentation)
17. Yu, W., Yang, W., Mohan, B., Tay, K., Zhao, F. and Chou, S.K., 2015. Multiple Injections study based on an advanced combustion investigation system. Energy Procedia, 75, pp.900-905.
18. Mohan, B., Yang, W., Chou. S.K. Effects of injection rate shaping on combustion and emission characteristics of biodiesel fueled CI engine - A CFD study. 6th International Conference on Applied Energy, ICAE 2014, Taipei, Taiwan. (Oral presentation)
19. Mohan, B., Yang, W., Raman, V., Sivasankaralingam, V., Chou, S.K. Optimization of biodiesel fuelled engine to meet emission standards through varying nozzle opening pressure and static injection timing. 5th International Conference on Applied Energy, ICAE 2013, Pretoria, South Africa. (Oral presentation)
20. Yang, W., An, H., Chou, S.K., Chua, K.J., Balaji, M., Vedharaj, S., Vallinayagam, R., Mohammad, F.E.A. Impact of emulsion fuel with nano-organic additives on the performance of diesel engine. 4th International Conference on Applied Energy, ICAE 2012, Suzhou, China. (Oral presentation)
21. Bharath, S., Balaji, M., Sai Krishna, G.R. Future of NEMS. ASME. International Conference on Micro/Nanoscale Heat Transfer, ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B ():1195-1202. doi:10.1115/MNHT2008-52239. (Oral presentation)

PhD Thesis

Performance and Emission Optimization of CIDI Engine through various Fuel Injection Strategies

Abstract:

Diesel engines are the most efficient energy conversion devices. However they have one serious drawback: the amount of exhaust emissions like NOx and particulate matter (PM) is comparatively higher than that of gasoline engines. Therefore, the goal of this thesis is to better understand the fuel-air mixing process and implement strategies to obtain NOx-soot trade-off. Despite several researches carried out in understanding fuel-air mixing process, it is still not comprehensive. In this work, a fundamental research on spray characteristics and fuel-air mixing process was done. A constant volume spray chamber was specially built for this purpose to simulate the engine combustion chamber condition during injection process. Then this information was used to develop a new hybrid spray model to accurately predict the fuel-air mixing of different fuels in detail by taking nozzle cavitation into account. Then finally engine experiments and 3D CFD simulations were done using different injection strategies to strike optimum trade-off between NOx and soot emissions.