Journal ArticleDOI
Combustion in swirling flows: A review
Nicholas Syred,János M. Beér +1 more
TLDR
The main effects of swirl are to improve flame stability as a result of the formation of toroidal recirculation zones and to reduce combustion lengths by producing high rates of entrainment of the ambient fluid and fast mixing as discussed by the authors.About:
This article is published in Combustion and Flame.The article was published on 1974-10-01. It has received 837 citations till now. The article focuses on the topics: Combustion chamber & Combustor.read more
Citations
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Journal ArticleDOI
Structure of a swirling, recirculating coaxial free jet and its effect on particle motion
Ryan B. Wicker,John K. Eaton +1 more
TL;DR: In this article, a developing coaxial swirling jet with sufficient annular swirl for flow recirculation was investigated and the effect of the flow field on particle motion was investigated using phase-averaged single hot-wire velocity measurements.
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Transitions and blowoff of unconfined non-premixed swirling flame
R. Santhosh,Saptarshi Basu +1 more
TL;DR: In this paper, the first observations of primary and secondary transitions in the time-averaged flame topology in a non-premixed swirling flame are reported, where the geometric swirl number S-G (a non-dimensional number used to quantify the intensity of imparted swirl) is varied from a magnitude of zero till flame blowout.
Journal ArticleDOI
Effect of inlet and outlet boundary conditions on swirling flows
TL;DR: In this article, the velocity profiles of both air and gas at the swirler outlets, which are used as inlet boundary conditions of the model combustor, were derived using the standard κ−ϵ turbulence model.
Journal ArticleDOI
Effect of co- and counter-swirl on the isothermal flow- and mixture-field of an airblast atomizer nozzle
TL;DR: In this paper, the influence of co-and counter-rotating airflows through the inner and outer ducts of an airblast atomizer on the turbulent flow and mixture field was investigated using a 3D-LDV-system.
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Experimental and numerical study on bluff-body and swirl stabilized diffusion flames
TL;DR: In this paper, a high-speed PIV simulation was used to capture flow fields within flames stabilized by combinations of swirl flow and bluff-body, and the global CO emissions from the flames were captured as well.
References
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Journal ArticleDOI
Theory of the vortex breakdown phenomenon
TL;DR: In this paper, it is shown that vortex breakdown is not a manifestation of instability or of any other effect indicated by study of infinitesimal disturbances alone, but instead a finite transition between two dynamically conjugate states of axisymmetric flow, analogous to the hydraulic jump in open-channel flow.
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On stationary and travelling vortex breakdowns
TL;DR: In this article, the authors describe some experiments in swirling flows in a diverging cylindrical tube in which various types of vortex breakdowns were observed, viz. mild (double helix) breakdown, spiral breakdown, and axisymmetric breakdown.
The bursting of leading-edge vortices - some observations and discussion of the phenomenon.
N. C. Lambourne,D. W. Bryer +1 more
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Experimental Investigation of Swirling Vortex Motion in Jets
N. A. Chigier,A. Chervinsky +1 more
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Some observations of the vortex breakdown phenomenon
TL;DR: In this article, a cylindrical vortex, formed in a long tube, was used to study the "vortex breakdown" that has been previously reported in investigations of the flow over slender delta wings.