University of Twente Student Theses
Extension of the Eilmer4 Gas Package
Lerink, C.W. (2017) Extension of the Eilmer4 Gas Package.
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| Abstract: | Eilmer4 is the new compressible flow CFD solver developed within the Centre for Hypersonics of the University of Queensland [10]. As an open source solver Eilmer4 is constantly in development. For using Eilmer4 in methane combustion test-cases. Combustion modelers and other users involved in combustion research often make use of ther modynanric data from the GRl-Mech database. To make Eilmer4 a suitable simulation code for methane-combustion test-cases, thermo dynanric data from GRl-Mech is implemented. With a conversion file written in Lua, the thermodynamic data from GRl-Mech is stored in multiple species Lua-files which are added to the Eilmer4 gas library. To obtain a first impression of the success fulness of the conversion, Gp, T-plots are created and roughly analyzed. To get more insight in behavior of the GRI-Mech species, several test cases are used for validation. The test cases selected all involve combustion of (stoichiometric) methane-air mixtures. The advantage of these test-cases is a high re semblance of future application of Eilmer4 in methane combustion. However, since chemical kinetics play a significant role during com bustion, reaction schemes are necessary which describe the chemistry. As the DRM-19 uses GRI-Mech models [23] and existing trusted test cases are available in Eilmer3, the DRM-19 reaction scheme is used for validating Eilmer4 in the combustion test-cases. Furthermore, a research of Yungster et al. [24] shows results of a test case where an alternative reaction scheme is used (Yungster gas model). Both Yung ster and DRM-19 reaction schemes are created for Eilmer4. The first test case that is used for validation is the fixed volume reactor. Eilmer4 using DRM-19 and GRl-Mech species shows great agreements with Eilmer3. Using Eilmer4 with the DRM-19 model for the hypersonic Yungster test case also produces a convincing compari son. For correct application of the Yungster gas model in Eilmer4 more adjustments to Eilmer4 are necessary. With the DRM-19 model the application of Eilmer4 for methane-combustion test cases is validated |
| Item Type: | Internship Report (Master) |
| Faculty: | ET: Engineering Technology |
| Subject: | 52 mechanical engineering |
| Programme: | Mechanical Engineering MSc (60439) |
| Keywords: | Eilmer4, Compressible flow CFD solver, Methane-combustion test-cases, Combustion modelling, Open source solver |
| Link to this item: | https://purl.utwente.nl/essays/84025 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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