Author: Tzong H. ChenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Conditional Velocity Measurements at the Base of a Turbulent Lifted Jet Flames
Author: Tzong H. ChenAn Experimental Study of Flamelet Surfaces in Turbulent Combustion
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 27
Book Description
The major objective of the research reported was to study the properties of constant scalar property surfaces in turbulent reacting flows. Two dimensional image measurements were made in premixed turbulent flames and in jets and jet flames. Point-in-space, time-series measurements were also made, and the data used to study the properties of surface crossing statistics in jets and premixed flames. In addition, the hypothesis that, for the purpose of estimating the mean surface area per unit volume, surfaces in turbulent flow can be represented by fractal surfaces was used to develop models for the mean chemical reaction rate in premixed flames and for the source term in the equation for intermittency in free jets. Also a new method for making conditional velocity measurements in premixed flames was developed and applied to obtain unique data for velocity in these flames and to study jumps, across flamelets, of certain velocity statistics. Major findings for the flows and conditions studied include: (1) for the premixed case flamelet surfaces are fractal as are constant mixture fraction surfaces in jets and constant temperature surfaces in jet flames; (2) in jets the surface fractal dimension is between 2.3 to 2.4; (3) level crossing sets from time-series data are not simple fractal sets; (4) the idea of fractal bursts is introduced to help interpret the crossing sets; and (5) unique fully-conditional velocity data give a measure of velocity jumps across flamelets in premixed combustion.
Conditional Velocity Statistics and Time-resolved Flamelet Statistics in Premixed Turbulent V-shaped Flames
Author: Paul Chester MilesProceedings of the 4th ASME/JSME Joint Fluids Engineering Conference
Author: Ali OgutPublisher:
ISBN: 9780791836965
Category : Fluid mechanics
Languages : en
Pages : 780
Book Description
Study of Turbulent Nonpremixed Jet Flames Using Simultaneous Measurements of Velocity and CH Distribution
Author: Donghee HanOn Flow of Turbulent Jet Flames
Author: Bjørn F. MagnussenPublisher:
ISBN:
Category : Combustion
Languages : en
Pages : 148
Book Description
Laser Raman Diagnostics in Subsonic and Supersonic Turbulent Jet Diffusion Flames
Author: T. S. ChengPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 196
Book Description
Turbulent Jet Flames Into a Vitiated Coflow
Author: Ricardo CabraTurbulent Combustion
Author: Norbert PetersPublisher: Cambridge University Press
ISBN: 1139428063
Category : Science
Languages : en
Pages : 322
Book Description
The combustion of fossil fuels remains a key technology for the foreseeable future. It is therefore important that we understand the mechanisms of combustion and, in particular, the role of turbulence within this process. Combustion always takes place within a turbulent flow field for two reasons: turbulence increases the mixing process and enhances combustion, but at the same time combustion releases heat which generates flow instability through buoyancy, thus enhancing the transition to turbulence. The four chapters of this book present a thorough introduction to the field of turbulent combustion. After an overview of modeling approaches, the three remaining chapters consider the three distinct cases of premixed, non-premixed, and partially premixed combustion, respectively. This book will be of value to researchers and students of engineering and applied mathematics by demonstrating the current theories of turbulent combustion within a unified presentation of the field.
Conditional Moment Closure Applied to Lifted and Attached Turbulent Jet Flames
Author: Cecile Brigitte Claudine DevaudPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description