Quantification of the Internal Surface Roughness of Cast Iron Exhaust Manifolds

2005-01-1625

04/11/2005

Event
SAE 2005 World Congress & Exhibition
Authors Abstract
Content
A study has been conducted to quantify the typical internal surface roughness of a cast iron exhaust manifold. In addition, the range of surface roughness values that can be obtained with various manufacturing methods was measured. Initial investigations were conducted to measure the effect of a range of surface roughness values on the performance of the engine system, specifically torque and the thermal losses through the exhaust manifold walls. Several manifold geometries were used to represent a variety of actual manifold applications, including designs that were subjected to tight packaging constraints. Physical tests were used to show that large variations in surface roughness resulted in modest changes in manifold component pressure losses. A simulation tool was used to predict that modest improvements in manifold pressure losses have little impact on engine output.
Meta TagsDetails
DOI
https://doi.org/10.4271/2005-01-1625
Pages
11
Citation
Burkhalter, G., Sloss, C., Auger, G., Nelson, S. et al., "Quantification of the Internal Surface Roughness of Cast Iron Exhaust Manifolds," SAE Technical Paper 2005-01-1625, 2005, https://doi.org/10.4271/2005-01-1625.
Additional Details
Publisher
Published
Apr 11, 2005
Product Code
2005-01-1625
Content Type
Technical Paper
Language
English