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Coupled simulation between GT-Power and Fluent
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

GT-Power is one of the most popular computer aided engine simulation tools and Fluent is one of the worlds leading CFD software. The newly introduced “coupled simulation” between the two programs has been proven to be of great interest at Scania since they are used separately at the present. The aim of this work has been to verify the accuracy of the coupled simulation and to determine the desired simulation conditions and requirements. The coupling has been put into practical use where an exhaust manifold of a Scania V8 engine and a modified manifold design were simulated. The impacts on engine performance were studied using the results of GT-power simulations, coupled simulations and engine test data. The comparison shows that the coupled simulation does achieve the intended purpose. However the coupling is limited to locations where the gas flow inside the engine component could be regarded as one-dimensional. One programming bug was discovered and was fixed by the software developers. The results of the coupling of the simple models were very satisfying and equally accurate as the GT-Power simulations. The simulation of the exhaust manifolds was not equally successful due to instability during the simulations. Additional adjustments to the models could facilitate the problem. The available results indicate that the left side modified manifold does bring improvements to the engine performance while the right side modified manifold shows worse performance.

Place, publisher, year, edition, pages
Keyword [en]
Technology, GT-Power, Fluent, Coupled simulation, Engine simulation, CFD
Keyword [sv]
URN: urn:nbn:se:ltu:diva-56058ISRN: LTU-EX--02/076--SELocal ID: cdd1e910-f389-42a8-8c18-a98f1e33f641OAI: diva2:1029444
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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