At the initial stage of injection, the inject flow has not yet broken up and in a range of small atmosphere pressure (16∼500KPa), the tip of the inject flow always forms a shape of mushroom. And the umbrella of the mushroom is always very big and the root of it is always very thin, especially when the atmosphere pressure is relatively low (88KPa, or 100mmHg) (1)(2). These phenomena are not known popularly and the reason of mushroom formation is not clear. In this paper, with MARS (Multi-interfaces Advection and Reconstruction Solver) method (3)(4)(5)for simulating free surface, analysis of inject flow is practiced. The phenomena are reproduced and the reason is cleared that the formation of the mushroom is induced by the momentum exchange between the very high speed fuel flow and the very complex air flow.
Numerical Analysis of Initial Shape of Nozzle Inject Flow
Sae International Journal of Passenger Cars. Mechanical Systems
Sae Int. J. Passeng. Cars – Mech. Syst
SAE World Congress & Exhibition ; 2008
Sae International Journal of Passenger Cars - Mechanical Systems ; 1 , 1 ; 184-188
2008-04-14
5 pages
Conference paper
English
Numerical Analysis of Initial Shape of Nozzle Inject Flow
British Library Conference Proceedings | 2008
|Numerical analysis of initial shape of nozzle inject flow
Automotive engineering | 2008
|2008-01-0243 Numerical Analysis of Initial Shape of Nozzle Inject Flow
British Library Conference Proceedings | 2008
|European Patent Office | 2015
|Numerical Simulation of Nozzle Starting Flow
Online Contents | 2015
|