One-dimensional ‘wave-action’ codes are widely used by internal combustion engine manufacturers. However, the modelling of multi-pipe junctions within such simulations presents a problem, since the geometry of the junctions cannot be represented fully using a one-dimensional approach, and it can produce a strongly directional effect on the propagated waves. ‘Pressure-loss’ models of junctions have been devised as boundary conditions for one-dimensional simulations, these allow the some geometry induced effects to be introduced into the calculation. This paper examines the performance of such models, when used to simulate a pulse converter-type junction, under unsteady flow conditions.
Modelling Engines with Pulse Converted Exhaust Manifolds Using One-Dimensional Techniques
Sae Technical Papers
SAE 2000 World Congress ; 2000
06.03.2000
Aufsatz (Konferenz)
Englisch
Modelling engines with pulse converted exhaust manifolds using one-dimensional techniques
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