NUMERICAL SIMULATION OF FLAME PROPAGATION IN INTERNAL COMBUSTION ENGINES: A STATUS REPORT
Work on the application of computational fluid dynamics methodology to the internal combustion engine is reviewed to assess the current computational capability and adequacy of subgrid scale models. Literature describing both one-dimensional and two-dimensional, transient computer codes was reviewed to develop a numerical model capable of simulating the combustion processes in the internal combustion engine. Such a model must be capable of handling the following: multidimensional systems; complex geometry; moving boundaries; transient, compressible fluid dynamics; disparate time scales (for chemistry, acoustic propagation, and diffusion of mass, momentum, and energy); and disparate spatial scales. Numerical dilemmas in modeling include choice of coordinate system (Eulerian or Lagrangian or mixed); higher-order or lower-order differencing techniques; implicit or explicit techiques; operator splitting or simultaneous solution of all equations; and finite differences or finite element techniques. Numerical diffusion limits the ability of finite difference techniques to compute the performance of combustion systems economically, but this can be circumvented by using Lagrangian coordinate systems. Flux correction techniques reduce numerical diffusion. A minimum of six and preferably ten zones should be located within the flame front, to get adequate resolution; an adaptive grid system may be needed.
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Supplemental Notes:
- Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Boni, A A
- Publication Date: 1978
Media Info
- Features: References;
- Pagination: 16 p.
Subject/Index Terms
- TRT Terms: Combustion; Fluid dynamics; Internal combustion engines; Simulation
- Subject Areas: Safety and Human Factors;
Filing Info
- Accession Number: 00395645
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: SAE 780316, HS-025 414U
- Files: HSL, USDOT
- Created Date: Jun 30 1985 12:00AM