Accession Number : ADA193787

Title :   Modeling of Spray Combustion in Direct Injection Diesel Engine.

Descriptive Note : Final rept. Jan 84-Dec 87,

Corporate Author : NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO

Personal Author(s) : Singh, Harmohindar ; Klett, David E

PDF Url : ADA193787

Report Date : 30 Jan 1988

Pagination or Media Count : 103

Abstract : A mathematical model has been developed to predict the penetration of a transient fuel spray, the temporal and spatial distribution of air fuel mixture before the end of ignition delay and the subsequent pressure rise during combustion in a Direct Injection Diesel Engine with and without swirl. The model accounts for the non-isothermal and non-isobaric character of processes during fuel injection resulting from continuous motion of the piston. The effects of various engine operating variables on spray have been studied and graphically presented. The calculated spray penetration with and without crossflow of air has been compared with the available experimental data of other researchers and good agreement between the two is noticed. The model can predict the rate of combustible mixture formation, the rate of heat release and cylinder pressure as a function of time in direct injection (DI) diesel engine. A single cylinder D.I. research diesel engine was operated with N-hexadecane as the engine fuel to validate the mathematical model. However, a leaking head gasket rendered the data unusable, so comparisons between modeled and measured cylinder pressure rise data are not included in this report.

Descriptors :   *COMBUSTION, *DIESEL ENGINES, *SPRAYS, AIR, CROSS FLOW, CYLINDRICAL BODIES, ENGINES, EXPERIMENTAL DATA, FUEL INJECTION, FUEL SPRAYS, FUELS, GASKETS, HEAT, IGNITION LAG, INJECTION, MATHEMATICAL MODELS, MIXTURES, MODELS, MOTION, PENETRATION, PRESSURE, PRESSURE GRADIENTS, RATES, RELEASE, TRANSIENTS, VARIABLES

Subject Categories : Combustion and Ignition
      Reciprocating and Rotating Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE