Experimental Analysis of the Influence of Exhaust Manifold Junction Geometry on its Fluid-Dynamic Behavior Universidad Politécnica de Valencia, Spain

Format:

Conference/Event

Author/Creator:

Payri, Francisco, author.

Conference Name:

SAE 2000 World Congress (2000-03-06 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

The purpose of this paper is to present the results of a study on the exhaust junctions geometry. Twelve three-branch junctions of different geometry have been tested on a single cylinder engine. The parameters studied have been exhaust junction outlet-to-inlet diameter ratio, length, angle between inlet branches and the existence of a reed separating inlet branches. An analysis of the pressure waves amplitude (incident, reflected and transmitted) obtained from instantaneous pressure measurements in some locations around the junction has been carried out.The analysis of results shows that junction length has a low influence on its behavior. The ratio between inlet and outlet branches diameters increases both reflection and directionality (avoiding pressure wave transmission to the adjacent branch). The existence of a reed separating the inlet flows may increase directionality with moderate pressure losses if the throat area is not reduced. Finally, a small angle between the inlet branches leads to the better compromise between directionality and reflection

Notes:

Vendor supplied data

Publisher Number:

2000-01-0914

Access Restriction:

Restricted for use by site license