A Numerical Study on the Effects of Exhaust Gas Recirculation Temperature on Controlling Combustion and Emissions of a Diesel Engine running on HCCI Combustion Mode

Year 2018, Volume: 2 Issue: 3, 17 - 27, 30.09.2018

Mushtaq Ahmad Rather , Mohammad Marouf Wani

https://doi.org/10.30939/ijastech..451574

Cited By: 13

Abstract

In this study a
comprehensive study is carried out numerically on a single cylinder four-stroke
Diesel engine operating in homogenous charge compression ignition (HCCI) mode
of combustion for the effects of exhaust gas recirculation (EGR) temperature
and percentage on the combustion and emission characteristics. An advanced
version of ANSYS IC Engine FORTE coupled with highly efficient and detailed
pre-defined industry standard chemical kinetics CHEMKIN is used to solve the
chemical reaction mechanism and species thermodynamic data. The analysis was
carried out at three different EGR temperatures of 363K, 404K and 513K for 10%,
20% , 30%, 40% and 50% EGR each. The results predicted that the combustion
ignition timing is advanced by increasing the EGR temperature. The effect of
low EGR temperature is predominant at higher percentages of EGR. It was also
found that the CO and UHC levels nearly kept constant with an increase in EGR
temperature the NOx levels increase linearly with an increase in EGR
temperature. The HCCI combustion in diesel engine can be controlled by
adjusting the temperature and mass percentage of exhaust gas recirculation
while retaining lower NOx emissions and very little increase in CO and unburnt
hydrocarbons.

Keywords

CHEMKIN, EGR, HCCI, IC Engine FORTE, NOx

References

• [1] Y. Nakamura, D. Jung, N. Iida. Closed-Loop Com-bustion of a HCCI Engine with Re-Breathing EGR System. SAE International Journal of Engines 2013-32-9069, 2013.
• [2] S. Jafarmadar, P. Nemati, R. Khodaie. Multidimen-sional modeling of the effect of exhaust gas recircula-tion (EGR) on exergy terms in an HCCI engine fuelled with a mixture of natural gas and diesel. En-ergy Conversion and Management 105 (2015) 498-508, 2015.
• [3] K. Mathivanan, J. M. Mallikarjuna, A. Ramesh. In-fluence of multiple fuel injection strategies on per-formance and combustion characteristics of a diesel fuelled HCCI engine- An experimental investigation. Experimental Thermal and Fluid Science 77 (2016) 337-346, 2016.
• [4] M. Yao, Z. Zheng, H. Liu. Progress and recent trends in homogenous charge compression ignition (HCCI) engines. Progress in Energy and Combustion Science 35 (2009) 398-437, 2009.
• [5] G. Haraldson, P. Tunestal, B. Johansson, J. Hyvonen. HCCI combustion phasing in a multicylinder engine using variable compression ratio. SAE Technical Pa-per2002-01-2858, 2002.
• [6] F. Agrell, H. E. Angstrom, B. Erricson, J. Wikander, J. Linderyd, Integrated simulation and Engine test of closed loop HCCI control by aid of Variable valve timings, SAE Technical Paper 2003-01-0748, 2003.
• [7] M. Sjoberg, J.E. Dec. Combined effects of fuel-type and engine speed on intake temperature requirements and completeness of bulk gas reactions in an HCCI engine. SAE Technical paper 2003-01-3173, 2003.
• [8] S.C. Kong, R.D. Reitz. Numerical study of premixed HCCI engine combustion and its sensitivity to computational mesh and model uncertainties. Combust Theor Model 2003-7-417-33.
• [9] J. Willand . The Knocking syndrome-its cure and its potential. SAE Paper 982483, 1998.
• [10] M. Christensen, B. Johansson, P Einewall. Homoge-nous charge compression ignition (HCCI) using iso-octane, ethanol, and natural gas- A comparison with spark ignition operation. SAE Paper 972874, 1997.
• [11] D. Law, D. Kemp, J. Allen, G Kirkpatrick, T. Copland. Controlled combustion in an IC-engine with a fully variable valve train. SAE paper 200-01-0251.
• [12] M. Fathia, R. Khoshbakhti Saray, M.D. Checkel. The influence of exhaust gas recirculation (EGR) on combustion and emissions of n-heptane / natural gas fuelled homogenous charge compression ignition (HCCI) engines. Applied Energy. 2011-88-4719-17.
• [13] S. Voshtani, M. Reyhanian, M. Ehteram, V. Hosseini. Investigating various effects of reformer gas enrich-ment on a natural gas-fuelled HCCI combustion en-gine. International Journal of Hydrogen Energy. 2014-39(34)-19799-809.
• [14] Z. Zheng, C. Liu, X. Zhang. Numerical study of ef-fects of reformed exhaust gas recirculation (REGR) on dimethyl ether HCCI combustion. International journal of Hydrogen Energy. 2014-39(15)-8106-17.
• [15] H. Zhao, Z. Peng, N. Ladommatos. Understanding of controlled autoignition combustion in a four-stroke gasoline engine. Proceedings Institute of Mechanical Engineering. 2001-215(Part D)-1297-310.
• [16] N. Milovanovic, R. Chen. A review of experimental and simulation studies on controlled auto-ignition combustion.SAE Paper 2001-01-1890, 2001.
• [17] N. Ladommatos, S. Abdelhalim, H. Zhao, Z. Hu. The effects of diesel combustion and emissions of reducing inlet charge mass due to thermal throttling with hot EGR. Warrendale, PA. SAE 98015-1998.
• [18] N. Ladommatos, S. Abdelhalim, H. Zhao, Z. Hu. Effects of EGR on heat release in diesel combustion. Warrendale, PA. SAE 2003-01-0747.