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Calculation of Three Dimensional Air Motion in Model Engines
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English
Abstract
Calculations are described of three-dimensional air motion in two motored model engine configurations and comparisons are made in one Instance with experimental data. The predictions were obtained using a newly-developed multidimensional method which has the following main features: a combination of expanding/contracting and curvilinear grid systems which can accommodate a range of practical engine configurations; finite volume discretisation; an Implicit, non-iterative solution algorithm; and, in the present application, a two-equation turbulence model. The two test cases involve off-centre annular- orifice and poppet-valve inlet/exhaust arrangements respectively, both of which generate complex flow structures, especially during Induction. The predictions for the former case show only moderate agreement with the data and point to the need for improved discretisation practices, among other aspects.
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Authors
- A.D. Gosman - Imperial College of Science and Technology Mechanical Engineering Department Fluids Section, London
- Y.Y. Tsui - Imperial College of Science and Technology Mechanical Engineering Department Fluids Section, London
- A.P. Watkins - Imperial College of Science and Technology Mechanical Engineering Department Fluids Section, London
Citation
Gosman, A., Tsui, Y., and Watkins, A., "Calculation of Three Dimensional Air Motion in Model Engines," SAE Technical Paper 840229, 1984, https://doi.org/10.4271/840229.Also In
References
- Gosman A D Watkins A P 1977 “A computer prediction method for turbulent flow and heat transfer in piston/cylinder assemblies” Proc of Symposium on Turbulent Shear Flows Penn State University
- Gosman A D Johns R J R 1978 “Development of a predictive tool for in-cylinder gas motion in engines” Proc 1978 SAE Congress, SAE 780315
- Gosman A D Johns R J R 1980 “Computer analysis of fuel-air mixing in direct-injection engines” Proc I960 SAE Congress. SAE 800091 , Also transactions 88 6 1980
- Ahmadi-Befrul B Gosman A D Lockwood F Watkins A P 1980 “Multidimensional calculation of combustion in an idealised homogenous charge engine: a progress report” Proc 1981 SAE Congress. SAE 810151 . Also transactions 89 9 1981
- Gosman A D Harvey P S 1982 “Computer analysis of fuel-air mixing and combustion in an axisymmetric d.i. Diesel” Proc 1982 SAE Congress, SAE 820036
- Gosman A D Johns R J R Tlpier W Watkins A P 1979 “Computer simulation of in-cylinder flow, heat transfer and combustion a progress report” Proc Int Congress on Combustion Engines Vienna
- Harvey P S Gosman A D 1982 “An analysis of the influence of swirl on combustion in Di engines by computer simulation” Proc IMechE Conf on Diesel Engines for Passenger Cars and Light Duty Vehicles, Paper C130/82
- Gosman A D Johns R J R Watkins A P 1980 “Development of prediction methods for in-cylinder processes in reciprocating engines” in Combustion Modelling in Reciprocating Engines Mattavi J N Amann C A Plenum
- Gosman A D Jahanbakhsh A 1981 “Comparisons between measurements and predictions of swirl in a reciprocating engine” Witze P O Sandia National Laboratories Livermore
- Ahmadl-Beful B Arcoumanls C Bicen A F Gosman A D Jahanbakhsh A Whitelaw J 1982 “Calculations and measurements of the flow in a motored model engine and implications for open-chamber, direct-injection engines” in Three Dimensional Shear Flows Carmi S
- Butler T D Cloutman L D Dukowicz J K Ramshaw J D 1979 “CONCHAS: An Arbitrary Lagranglan-Eulerlan Computer Code for multi-component chemically reactive fluid flow at all speeds” Los Alamos Scientific Laboratory report LA-8129-MS
- Griffen M D Dlwaiker R Anderson J D Jnr Jones E 1978 “Computational fluid dynamics applied to flows in an internal combustion engine” AIAA Paper 78-57
- Markatos N C Mukerjee T 1981 “Three-Dimensional computer analysis of flow and combustion in automotive internal combustion engines” in Mathematics and Computers in Simulation XXIII 354 366
- Morse A P Whitelaw J H Yianneskls M 1980 “The flow characteristics of a piston-cylinder assembly with an off-centre, open port” Proc IMechE 1980 194 31 291 299
- Gosman A D Johns R J R 1979 “A method of generating curvilinear-orthogonal grids for numerical fluid mechanics calculations” Fluids Section Report. Mech Eng Dept. Imperial College. FS/79/27
- Issa R I 1982 “Solution of the implicitly discretised fluid flow equations by operator splitting” Fluids Section Report, Mech Eng Dept. Imperial College, FS/82/15
- Gosman A D Issa R I Watkins A P 1983 “Application of a new Implicit scheme to the computation of compressible and Incompressible recirculating flows” Fluids Section Report, Mech Eng Dept. Imperial College, FS/83/8
- Stone H L 1968 “Iterative solution of implicit approximations of multi-dimensional partial differential equations” SIAM J Numer Anal 5 530 558
- Johns R J R 1980 “Calculation of diesei engine flow and heat transfer” PhD Thesis, London University”
- Bicen A F Whitelaw J H 1983 “Steady and unsteady flow through an intake valve” Fluids Section Report, Mech Eng Dept. Imperial College, FS/83/11