THREE DIMENSIONAL MODLING OF COMBUSTION PROCESS AND EMISSION FORMATION IN A LOW HEAT REJECTION IDI DIESEL ENGINE

Abstract

Higher heat losses and brake specific fuel consumption (BSFC) are major problems in an indirect injection (IDI) diesel engine, which can be overcome by means of low heat rejection (LHR) concept. This concept is based on the approach of insulating of piston and liner of main chamber in IDI engine. At the present work, the combustion process and emission formation in baseline and LHR engines are studied by a Computational Fluid Dynamics (CFD) code at four different loads (25%, 50%, 75% and 100%) in maximum torque engine speed 730rpm. The numerical results for the pressure in cylinder and emissions for baseline engine at full load operation are compared to the corresponding experimental data and show good agreement. The comparison of the results for two cases show that when the load increases from 25% to 100% in 25% steps, heat loss in LHR engine decrease 40.3%, 44.7%,44.6% and 45.2%, respectively. At full load operation in LHR engine, NOx and Soot emissions decrease 13.5% and 54.4%, respectively and engine efficiency increases 6.3% in comparison to baseline engine.

Dates

  • Submission Date2013-02-03
  • Revision Date2013-08-12
  • Acceptance Date2013-08-26
  • Online Date2013-09-22

DOI Reference

10.2298/TSCI130203126J

References

  1. Canakci, M. Bioresour. Combustion Characteristics of a Turbocharged DI Compression Ignition Engine Fueled with Petroleum Diesel Fuels and Biodiesel. Bioresource Technology. 2007, 98, 1167- 1175.
  2. Ozsezen A. N., Canakci M., Sayin, C. Effects of Biodiesel from Used Frying Palm Oil on the Performance, Injection, and Combustion Characteristics of an Indirect Injection Diesel Engine .Energy and Fuels 2008, 22, 1297-1305.
  3. Ghojel. J, Honnery. D. Heat release model for the combustion of diesel oil emulsions in DI diesel engines. Appl. Therm. Eng. 2005, 25, 2072-2085.
  4. Heywood J. B. Internal Combustion Engine Fundamentals. McGraw Hill International Editions: New York, 1988; pp 491-497.
  5. Bosch Handbook. Diesel-Engine Management: An Overview; Robert Bosch GmbH: Stuttgart, Germany, 2003; pp 24-27.
  6. Owen, K.; Coley, T. Automotive Fuels Reference Book, second ed.;SAE: Warrendale, PA, 1995; p 375.
  7. Abdel-Rahman, A. A. A review :On the emissions from internal-combustion engines . Int. J. Energy Res. 1998, 22 (6), 483-513.
  8. Iwazaki K., Amagai K.; Arai, M. Improvement of fuel economy of an indirect injection (IDI) diesel engine with two-stage injection. Energy 2005, 30, 447-459.
  9. Rakopoulos, C. D.; Antonopoulos, K. A.; Rakopoulos, D. C.; Giakoumis, E. G. Study of combustion in a divided chamber turbocharged diesel engine by experimental heat release analysis in its chambers. Appl. Therm. Eng. 2006, 26 (14-15), 1611-1620.
  10. Kamo R., Bryzik W. Cummins adiabatic engine program, SAE paper, no. 83314, 1983.
  11. Kamo R., Woods M., Yaamuda T., More M. Thermal barrier coating for diesel engine piston, ASME Transactions. Paper 80-DGP-14, 1980.
  12. Thring R.H. Low heat rejection engines. SAE paper, no. 860314, 1986.
  13. Parlak A., Yasar H., Sahin B. Performance and exhaust emission characteristics of a lower compression ratio LHR diesel engine. Energy Conversion & Management 44 (2003) 163-175.
  14. Parlak A., Sahin B., Yasar H. Performance optimization of an irreversible dual cycle with respect to pressure ratio and temperature ratio—an experimental results of a ceramic coated IDI diesel engine. Energy Conversion & Management 45 (7-8) (2004) 1219-1232.
  15. Kamo R., Bryzik W. Adiabatic turbo compound engine program. SAE paper, no. 810070, 1981.
  16. Wallace F.J., Way J.B., Vallmert H. Effect of partial suppression of heat loss of coolant on the high output diesel engine cycle. SAE paper, no. 790823, 1979.
  17. Parker D.A., Donison G. The development of an Air gap Insulated Piston. SAE paper, no. 870652, 1985.
  18. Kamo R., Mavinahally N.S., Kamo L., Bryzik W., Schwartz R. Injection Characteristics that Improve Performance of Ceramics Coated Diesel engines. Society of Automotive Engineers, 1999.
  19. Adnan Parlak , Halit Yasar , Can Hasimogˇlu, Ahmet Kolip. The effects of injection timing on NOx emissions of a low heat rejection indirect diesel injection engine. Applied Thermal Engineering 25 (2005) 3042-3052.
  20. Ekrem Buyukkaya , Muhammet Cerit. Experimental study of NOx emissions and injection timing of a low heat rejection diesel engine. International Journal of Thermal Sciences 47 (2008) 1096-1106.
  21. Dickey D.W. The effect of insulated chamber surfaces on direct injected diesel engine performance, emissions, and combustion. SAE paper, no. 890292, 1989.
  22. Jaichandar S., Tamilporai P. The Status of Experimental Investigations on Low Heat Rejection Engines. SAE paper 2004-01-1453
  23. Amann C.A. Promises and challenges of the low-heat-rejection diesel. Journal of Engineering for Gas Turbines and Power 110 (1988) 475-481.
  24. Yiming Wang, Changlin Yang, Guocai Shu, Yincheng Ju, and Kuihan Zhao. An Observation of High Temperature Combustion Phenomenon in Low-Heat- Rejection Diesel Engines. SAE paper, no. 940949, 1994.
  25. Dennis Assanis and Kevin Wiese, Ernest Schwarz and Waiter Bryzik .The Effects of Ceramic Coatings on Diesel Engine Performance and Exhaust Emissions. 1991, SAE paper no. 910460.
  26. Imdat Taymaz. An experimental study of energy balance in low heat rejection diesel engine. Energy 31 (2006) 364-371
  27. Adnan Parlak. The effect of heat transfer on performance of the Diesel cycle and exergy of the exhaust gas stream in a LHR Diesel engine at the optimum injection timing. Energy Conversion and Management 46 (2005) 167-179.
  28. Hejwowski T, Weronski A. The effect of thermal barrier coatings on diesel engine performance. Vacuum 65 (2002) 427.
  29. Toyama K, Yoshimitsu T, Nishiyama T. Heat insulated turbo compound engine. SAE Transactions, vol. 92, 1983, p. 3.1086.
  30. Pinchon P. Three dimensional modeling of combustion in a pre-chamber Diesel engine. SAE 890666.
  31. Zellat M., Rolland Th. and Poplow F. Three dimensional modeling of combustion and soot formation in an indirect injection diesel engine. SAE 900254.
  32. Tim Sebastian Strauss, George Wolfgang Schweimer. Combustion in a swirl chamber diesel engine simulation by computation of fluid dynamics. SAE 950280.
  33. Hasimoglu C .Exhaust emission characteristics of a low-heat-rejection diesel engine fuelled with 10 per cent ethanol and 90 per cent diesel fuel mixture. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering January 1, 2008 222: 93-100,.
  34. Hanbey Hazar. Characterization and effect of using cotton methyl ester as fuel in a LHR diesel engine. Energy Conversion and Management Volume 52, Issue 1, January 2011, Pages 258-263.
  35. Han Z., Reitz R. D. Turbulence Modeling of Internal Combustion Engines Using RNG k −ε Models. Combustion Science and Technology, Vol. 106, pp.267-295., 1995.
  36. Liu AB, Reitz RD. Modeling the effects of drop drag and break-up on fuel sprays. SAE Paper NO. 930072; 1993.
  37. Dukowicz JK. Quasi-steady droplet change in the presence of convection. Informal report Los Alamos Scientific Laboratory. LA7997-MS.
  38. AVL FIRE user manual V. 8.5; 2006.
  39. Naber JD, Reitz RD. Modeling engine spray/wall impingement. SAE Paper NO. 880107,1988.
  40. Halstead M, Kirsch L, Quinn C. The Auto ignition of hydrocarbon fueled at high temperatures and pressures - fitting of a mathematical model. Combustion Flame 30 (1977): 45-60.
  41. Patterson M. A., Kong S. C., Hampson G. J. Reitz R. D., "Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions", SAE Paper 940523, 1994.
  42. Mohammahi Kusha A ,Khoushbakhti Saray R, , Pirozpanah V. Ignition of dual fuel engines by using free radicals existing in EGR gases. PhD thesis, Faculty of mechanical engineering, Tabriz university, Iran 2008.
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