Effects of Reynolds number and density on a Jet-in-Hot-Coflow

Content Provider	Semantic Scholar
Copyright Year	2009
Abstract	The Delft Jet-in-Hot-Coflow (DJHC) burner mimics flameless combustion for research purposes. Although the burner is intended to be used with natural gas in the jet, in this research it is operated with an inert air jet, to gain insight in the characteristics of the flow field without the further complication of combustion. This thesis reports on the effects of Reynolds number and density ratios ( ρjet ρcoflow ) on radial and axial velocities, Reynolds stresses, location of the virtual origin, and decay rate, all at the centreline, using LDA and CARS. Four different cases are studied, one of which should have the same parameters as studied by Oldenhof et al.[1], though without the flame, but has a different density ratio. The other three are ceteris paribus cases with one different density ratio and one different Reynolds number of the jet, two cases have the same Reynolds number and the same density ratio, but other parameters are different (e.g. temperature and velocity). The results obtained in this thesis are quite different from results obtained by Lenze [2], Ebrahimi [3] and Hussein et al. [4], who reported on studies of turbulent free jets. These deviations can be caused by the relativelty low turbulence in the cases studied in this thesis, compared to other investigations and the presence of a coflow in this thesis.
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Alternate Webpage(s)	https://repository.tudelft.nl/islandora/object/uuid:5b1bca06-2be9-466a-a62b-a27db6da434d/datastream/OBJ/download
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article