Cycle-Averaged Heat Flux Measurements in a Straight-Pipe Extension of the Exhaust Port of an SI Engine Oakland University

Format:

Conference/Event

Author/Creator:

Farrugia, M., author.

Conference Name:

SAE 2006 World Congress & Exhibition (2006-04-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2006

Summary:

This paper presents an experimental study of the cycle-averaged, local surface heat transfer, from the exhaust gases to a straight pipe extension of the exhaust port of a four-cylinder spark-ignition (SI) engine, over a wide range of engine operating conditions, from 1000 rpm, light load, through 4000 rpm, full load. The local steady-state heat flux was well correlated by a Nusselt-Reynolds number relationship that included entrance effects. These effects were found to be the major contributor to the local heat transfer augmentation.The Convective Augmentation Factor (CAF), which is defined as the ratio of the measured heat flux to the corresponding heat flux for fully-developed turbulent pipe flow, was found to decrease with increasing Reynolds number and increasing axial distance from the entrance of the test section. The CAF values at the downstream location were found to agree surprisingly well with corresponding values, found in the takedown pipe and tailpipe by other investigators

Notes:

Vendor supplied data

Publisher Number:

2006-01-1033

Access Restriction:

Restricted for use by site license