Thesis (MEng)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: This study is an introductory investigation into vaporizer technology as implemented in micro
gas turbines. Experimental investigations are aimed at the development of expectations
concerning the internal flow structure though vaporizers by generating application specific
flow maps. Consolidation of these maps with other experimental data suggests that annular
flow leads to increased evaporation rates. In addition, it was discovered that flow structure is
affected by the injection angle and air and fuel flow rates. An investigation into the numerical
modelling of vaporizers is based on two phase flow theory using a flow structure approach.
The numerical behaviour is observed for parametric variations to establish the impact of
assumptions. A final numerical model is formulated with empirically determined coefficients
with fair correlation to experimental data. The results of this study yield recommendations
towards the implementation and analysis of vaporizers with applied use in micro gas turbines. / AFRIKAANSE OPSOMMING: Hierdie studie is 'n inleidende ondersoek na verdamper tegnologie soos toegepas in mikro
gasturbines. Eksperimentele ondersoeke is gerig op die ontwikkeling van kennis rakende die
interne vloeistrukture deur verdampers met die bou van toepassingspesifieke vloeikaarte.
Konsolidering van hierdie kaarte met verdere eksperimentele data dui daarop dat annulêre
vloei lei tot verhoogde verdampingstempo’s. Daar is ook bevestig dat die vloei struktuur deur
die inspuitingshoek en vloeitempo’s affekteer word. 'n Ondersoek na die numeriese
modellering van verdampers is gebasseer op twee-fase vloei met 'n vloeistruktuur benadering.
Die numeriese gedrag is waargeneem vir parametriese variasies om sodoende die impak van
aannames te bevestig. Die numeriese model is voltooi met empiriese bepaalde koëffisiënte en
lei tot goeie korrelasie met eksperimentele data. Resultate van hierdie studie lei tot
aanbevelings rakende die implementering en ontleding van verdampers met spesifieke
toepassing op mikro gas turbines.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/97143 |
| Date | 03 1900 |
| Creators | Olivier, Andre Jacobus |
| Contributors | Meyer, Christian J., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | 121 pages : illustrations |
| Rights | Stellenbosch University |
Page generated in 0.0018 seconds