Experiments on Transient Vortex Interactions PDF Download
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Author: Narayanan Menon Komerath
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages :
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Author: Narayanan Menon Komerath
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The understanding of complex premixed combustion reactions is paramount to the development of new concepts and devices used to increase the overall usefulness and capabilities of current technology. The evolution from laminar spherically propagating flames to turbulent chemistry is a logical and necessary process to study the complex interactions which occur within any modern practical combustion device. Methane-air flames were chosen to observe the mild affects of thermo-diffusive stability. Five primary propane equivalence ratios were utilized for investigation: 0.69, 0.87, 1.08, 1.32, and 1.49. The choice of equivalence ratio was strategically made so that the 0.69/1.49 and 0.87/1.32 mixtures have the same undiluted flame propagation rate, dr/dt. Therefore, in the undiluted case, there are two flame speeds represented by these mixtures. Three vortices were selected to be used in this investigation. The vortex rotational velocities were measured to be 77 cm/s, 266 cm/s and 398 cm/s for the “weakâ€, “medium†and “strong†vortices, respectively. Ignition of the flame occurred in two ways: (1) spark-ignition or (2) laser ignition using an Nd:YAG laser at its second harmonic in order to quantify the effect of electrode interference. Accompanying high-speed chemiluminescence imaging measurements, instantaneous pressure measurements were obtained to give a more detailed understanding of the effect of vortex strength on reactant consumption rate over an extended time scale and to explore the use of a simple measurement to describe turbulent mixing. Further local flame-vortex interface analysis was conducted using non-invasive laser diagnostics, such as particle image velocimetry and planer laser induced fluorescence of the OH radical. The dependence of heat release rate on temperature provides an estimation of the strain rate dependence of the reaction rate.
Author: Earl R. Booth
Publisher:
ISBN:
Category : Flow visualization
Languages : en
Pages : 32
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Author:
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ISBN:
Category :
Languages : en
Pages : 32
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Author: S.G. Liou
Publisher:
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Category :
Languages : en
Pages :
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Author: Markus Raffel
Publisher: Springer Science & Business Media
ISBN: 3540723072
Category : Technology & Engineering
Languages : en
Pages : 460
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This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Author: L. N. Cattafesta
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ana María de León Meléndez
Publisher:
ISBN:
Category : Vortex-motion
Languages : en
Pages : 312
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Author: Alexander Weigand
Publisher:
ISBN:
Category :
Languages : en
Pages : 430
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Author: Gerd E. A. Meier
Publisher:
ISBN:
Category :
Languages : de
Pages : 42
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