The Investigation of velocity and temperature changes by CFD analysis for intake stroke of LPG fuel stratified engine

Abstract

This study numerically investigates the in-cylinder speed and temperature variations for fuel-air mixture intake at the induction stroke by the LPG cylinder of an engine running on the stratified charge principle. The present study is based on the CFD model created using experimental data. Examinations were performed between the top dead center and the bottom dead center during the induction stroke. In-cylinder speed and temperature variations were obtained by k-ε turbulence model depending on the crankshaft angle and revolutions per minute (900, 3000, 5500 rpm). The obtained results were compared with the known theoretical values for stratified charge engines, and consistent results were obtained.

Keywords

• Stratified Charge,CFD Analysis,Internal Combustion Engine

References

1. Can. I., Oner, C., and Sugozu. I., ‘Experimental Investigation of Effect of Stratified Charging System Adopted to Gasoline Engine Running with Lpg on Engine Performance’, Journal of the Energy Institute (ISI), 113-118 pp., 2013.
2. Zhao, F., Lai, M. C., Harrington, D. L., ‘Automotive Spark-Ignited Direct-Injection Gasoline Engines’, Progress in Energy and Combustion Science, USA, 1999.
3. Wood, C. D., ‘Unthrottled Open-Chamber Stratified Charge Engines’, SAE Paper, No: 780341, 1978.
4. Bayraktar, H., O. Durgun., ‘Investigating the Effects of Lpg on Spark Ignition on Engine Performance’, Energy Conversion and Management, 46: 2317-2333, 2005.
5. Johnson, E., ‘LPG: A Secure, Cleaner Transport Fuel’ A Policy Recommendation for Europe. Energy, Policy, 31: 1573-1577, 2003.
6. Jermy, M.C., Harrison, M., Vuorenkoski, A.K., Mohamad, T.I., Kaparis, E., Macartney, M., ‘Overcoming Power Loss In LPG/LPG Conversions Of Vehicle Engines’ International J. Heavy Vehicle Design, Special Issue, 2006.
7. Mohamad, T. I., Jermy, M., Vuorenskoski, A. K., Harrison, M., ‘The Effects of Propane and Gasoline Sprays Structures from Automotive Fuel Injectors under Various Fuel and Ambient Pressures on Engine Performance’, World Applied Sciences Journal 18 (3): 396-403, 2012, DOI: 10.5829/idosi.wasj.2012.18.03.637
8. Can Cınar, Direkt Püskürtmeli Buji İle Ateşlemeli Motorlar, Gazi Üniversitesi Teknik Eğitim Fakültesi Makine Bölümü 06500 Beşevler/ANKARA

9. Basha, S.A., Gopal, K.R., ‘In-Cylinder Fluid Flow, Turbulence And Spray Models’, A Review, Ren. Sust. Energy Rev. 13, 1620–1627, 2009.
10. Varol, Y., Oztop, H. F., Firat, M., Koca, A., ‘CFD Modeling Of Heat Transfer And Fluid Flow Inside A Pent-Roof Type Combustion Chamber Using Dynamic Model’, International Communications in Heat and Mass Transfer, DOI:10.1016/j.icheatmasstransfer.2010.07.003.
11. FLUENT 12.0 User Guide, 2009.
12. Han, Z., Reitz, RD., ‘Turbulence Modeling Of Internal Combustion Engines Using RNG K-Ε Models’, Combust Sci. Tec., 106(4):267e95, 1995.
13. Thakur, S., Wright, JR., ‘A Multiblock Operator-Splitting Algorithm For Unsteady Flows At All Speeds In Complex Geometries’, Int Journal Number Methods Fluids, 46(4):383e413, 2004.
14. Kosmadakis, G.M., , Rakopoulos, C.D., Demuynck, J., Paepe, M. D., Verhelst, S., ‘CFD Modeling And Experimental Study Of Combustion And Nitric Oxide Emissions In Hydrogen-Fueled Spark-Ignition Engine Operating In A Very Wide Range Of EGR Rates’, International Journal Of Hydrogen Energy. DOI:10.1016/j.ijhydene.2012.04.067.
15. Giacosa, D., Motori Endotermici, 2 nd Edition, 1986 (Ulrico Hoelpi, Milao)
16. Weaving, J. H., (1990). Internal Combustion Engineering: Science & Technology, Elsevier Science Publishers LTD.