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
Effect of recess length on the flame parameters and combustion performance of a low swirl burner
TL;DR: In this paper, the authors evaluated the stability, thermal and environmental behavior of the natural gas premixed combustion of a 55kW Low Swirl Burner (LSB) and revealed that the influence of reducing swirl number is proportional to the increase of recess length due to the decaying nature of swirl flow.
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Numerical calculations of three‐dimensional turbulent vortex breakdown
Robert E. Spall,Thomas B. Gatski +1 more
TL;DR: In this article, numerical solutions to the three-dimensional, unsteady, incompressible Reynolds-averaged Navier-Stokes equations have been obtained for bubble-type vortex breakdown.
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Characteristics of combustion and pollutant formation in swirling flames
Toshimi Takagi,Tatsuyuki Okamoto +1 more
TL;DR: In this article, the authors present a detailed measurement of gas species concentrations and temperature in a flame formed around a fuel (propane) jet surrounded by a swirling air flow and examine the interrelation between the flame structure and the formation and emission characteristics of air pollutants such as NO x, CO, and hydrocarbons.
Journal ArticleDOI
Studies of the Precessing Vortex Core in Swirling Flows
TL;DR: In this article, the precessing vortex core (PVC) is characterized in a simple swirl burner under combustion conditions so as to reveal the effects of swirl and other variables on the latter.
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Investigation of self-induced thermoacoustic instabilities in gas turbine combustors
TL;DR: In this paper, the authors investigated the effect of air-fuel equivalence ratio ∅ on exciting thermoacoustic instabilities and its impact on the characteristics of both the acoustic and combustion fields in a partially premixed swirl combustor.
References
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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.