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Weldment Analysis of a Diesel Engine Exhaust Manifold

[+] Author Affiliations
Masoud Mojtahed, Nganh Le, Jerry Wayne DeSoto

Purdue University Northwest, Hammond, IN

Paper No. IMECE2016-67453, pp. V009T12A020; 7 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5063-3
  • Copyright © 2016 by ASME


The Exhaust Manifold is an increasingly important component of industrial turbocharged diesel engines. It can be a key factor to increase the efficiency of any engine, in this case a power plant diesel engine. Analysis of the various structural and thermal loading of the liquid-cooled manifolds is of vital importance to increase the components efficiency and overall engine performance. In this analysis, problems such as thermal stress issues causing manifold failure are identified and redesigned to meet performance requirements and environmental regulations. These manifolds are of complicated shapes and contain many weld joints to attach several integral parts. The weld regions are identified to be sensitive to thermal stresses and most likely prone to failure. The welds were added to the model in ANSYS® Workbench. Computational Fluid Dynamics (Fluent) and Finite Element Analysis (FEA) were used to analyze the welded model. The main outcome was to understand the welds behavior using the ANSYS software and its powerful tools and to determine whether the areas containing welds are likely to fail under the given conditions. A simple double pipe model was also created and congruently analyzed to validate the results and the techniques used in analyzing the manifold model.

Copyright © 2016 by ASME



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