EFFECT OF THE INJECTION PRESSURE ON THE INTERNAL FLOW CHARACTERISTICS FOR DIETHYL AND DIMETHYL ETHER AND DIESEL FUEL INJECTORS
Abstract
The spray characteristics of the diesel fuel are greatly affected by the
cavitation formed inside the injector due to the high pressure differential
across the nozzle. Many researchers across the globe are exploring the
potential of using diethyl ether and dimethyl ether as an alternate for diesel
fuel to meet the strict emission norms. Due to the variation in the fuel
properties the internal flow characteristics in injectors for ether fuels are
expected to be different from that of the diesel fuel. In this paper
computational technique is used to study and compare the internal flow
characteristics of diethyl ether, dimethyl ether and diesel fuel. The two phase flow model considering the fuel as a mixture of liquid and vapor is adopted for the simulation study. The injection pressure is varied from 100 to 400 bar and the flow characteristics of all three fuels are simulated and
compared. Results indicate that all three fuels have distinct cavitating
patterns owing to different property values. The dimethyl ether is found to be more cavitating than diesel and diethyl ether fuels as expected. The mass of fuel injected are found to be decreasing for the ether fuels when compared with diesel fuel at all injection pressures.
Dates
- Submission Date2010-07-17
- Revision Date2011-08-18
- Acceptance Date2011-08-24
References
- N.Takenaka,, T.Kadowaki, Y.Kawabata, I.C.Lim, C.M.Sim, Visualization of cavitation phenomena in a diesel engine fuel injection nozzle by neutron radiography, Elsevier, 2004
- C.S.Lee, H. K. Suh, S. H. Park, Experimental investigation of nozzle cavitating flow characteristics for diesel and biodiesel fuels, International Journal of Automotive Technology, Vol. 9, No. 2, pp. 217-224 (2008)
- J.M. Desantes, R. Payri, F.J. Salvador and J. De la Morena, Influence of cavitation phenomenon on primary break-up and spray behaviorat stationary conditions, Fuel 89 (2010) 3033-3041
- Kapus P and Ofner H. Development of fuel injection equipment and combustion system for DI diesels operated on di-methyl ether. SAE Paper 950062, SAE Trans J Fuel Lubr 1995; 104(4):54-9.
- Kajitani S, Chen CL, Konno M., Engine performance and exhaust characteristics of directinjection diesel engine operated with DME, SAE Paper 972973, SAE Trans J Fuel Lubr 1997;106(4):1568-77.
- Miyamoto N, Ogawa H, Nurm NM, Obata K and Arima T, Smokeless, low NOx, high thermal efficiency, and low noise diesel combustion with oxygenated agents as main fuel. SAE paper 980506; 1998.
- Diaa M. Hosny, Doug Hudgens and Tony Cox, Cavitation Correlation to Fluid Media Properties, SAE Paper no: 960882, 1996-02-01.
- FLUENT v6.3 documentation
- Som S, Aggarwal SK, El-Hannouny EM, Longman DE. Investigation of nozzle flow and cavitation characteristics in a diesel injector. Journal of Engineering for Gas Turbine and Power 2010;132(4):1-12
- Singhal AK, Athavale AK, Li H, Jiang Y. Mathematical basis and validation of the full cavitation model. Journal of Fluid Engineering 2002; 124:617-24.
- Constantine Arcoumanis, Choongsik Bae, Roy Crookes and Eiji Kinoshita, The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review, Fuel 87 (2008) 1014-1030
- David R.Lide, CRC Handbook of Chemistry and Physics, 84th edition, CRC Press,2003-2004
- Jun-Mei Shi and Mohammad Shamsul Arafin, CFD investigation of fuel property effect on cavitating flow in generic nozzle geometries,ILASS - Europe 2010, 23rd Annual Conference on Liquid Atomization and Spray Systems, Brno, Czech Republic, September 2010
- Su Han Park, Hyun Kyu Suh and Chang Sik Lee, Nozzle flow and atomization characteristics of ethanol blended biodiesel fuel, Renewable Energy 35 (2010) 144-150
Volume
15,
Issue
4,
Pages1123 -1130