TY - JOUR

T1 - Di diesel engine combustion visualized by combined laser techniques

AU - Arnold, A.

AU - Dinkelacker, F.

AU - Heitzmann, T.

AU - Monkhouse, P.

AU - Schäfer, M.

AU - Sick, V.

AU - Wolfrum, J.

AU - Hentschel, W.

AU - Schindler, K. P.

N1 - Funding Information: Financial support by Volkswagen AG and by the Commission of the European Communities within the framework of the JOULE Programme, by the Swedish National Board for Technical Development and by the Joint Research Committee of European automobile manufacturers (Fiat, Peugeot SA, Re-nault, Volkswagen, Volvo) within the IDEA Programme is gratefully acknowledged. We also acknowledge the collaboration of W. Ketterle and H. Becker in the early stages of this project.

PY - 1992

Y1 - 1992

N2 - In this work we demonstrate that the progress of the combustionccycle in a four-cylinder (in-line) 1.9 1 direct injection Diesel engine can be studied effectively using different laser visualization techniques. Direct optical access to the piston bowl was facilitated by inserting quartz windows in one of the pistons. The flow field at the time of injection was characterized by seeding the flow and illuminating the piston bowl with a laser light sheet. Fuel spray development, auto-ignition and flame propagation in a Diesel cycle were followed by laser shadowgraphy and high speed cinematography while simultaneous laser induced fluorescence (LIF) and Mie scattering images were taken to distinguish the fuel distribution in the liquid and vapor phase. In addition, two dimensional distributions of OH and NO, formed during n-heptane/air combustion in the same engine, were recorded in the pressure range 5 to 50 bar by LIF following narrowband excitation using tunable excimer lasers. Finally, further work, designed to obtain quantitative images and hence data for comparison with model calculations, is outlined.

AB - In this work we demonstrate that the progress of the combustionccycle in a four-cylinder (in-line) 1.9 1 direct injection Diesel engine can be studied effectively using different laser visualization techniques. Direct optical access to the piston bowl was facilitated by inserting quartz windows in one of the pistons. The flow field at the time of injection was characterized by seeding the flow and illuminating the piston bowl with a laser light sheet. Fuel spray development, auto-ignition and flame propagation in a Diesel cycle were followed by laser shadowgraphy and high speed cinematography while simultaneous laser induced fluorescence (LIF) and Mie scattering images were taken to distinguish the fuel distribution in the liquid and vapor phase. In addition, two dimensional distributions of OH and NO, formed during n-heptane/air combustion in the same engine, were recorded in the pressure range 5 to 50 bar by LIF following narrowband excitation using tunable excimer lasers. Finally, further work, designed to obtain quantitative images and hence data for comparison with model calculations, is outlined.

UR - http://www.scopus.com/inward/record.url?scp=0027012259&partnerID=8YFLogxK

U2 - 10.1016/S0082-0784(06)80187-6

DO - 10.1016/S0082-0784(06)80187-6

M3 - Article

AN - SCOPUS:0027012259

VL - 24

SP - 1605

EP - 1612

JO - Symposium (International) on Combustion

JF - Symposium (International) on Combustion

SN - 0082-0784

IS - 1

ER -