Examination of a Simulated Micro-gravity Device for Evaluating Flame Instability Transitions and Flame Spread Over Thin Cellulosic Fuels PDF Download
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Author: Stefanus A. Tanaya
Publisher:
ISBN:
Category : Flame spread
Languages : en
Pages : 432
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Book Description
Author: Stefanus A. Tanaya
Publisher:
ISBN:
Category : Flame spread
Languages : en
Pages : 432
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Book Description
Author: Yang Long
Publisher:
ISBN:
Category : Cellulose
Languages : en
Pages : 348
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Book Description
Author: Karin Laksmi Aditjandra
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 290
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Book Description
Author: National Institute of Standards and Technology (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 1162
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
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Book Description
Author: Dominique Langevin
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 368
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
In most microgravity studies of flame spread, the flame is assumed to be two-dimensional, and two-dimensional models are used to aid data interpretation. However, since limited space is available to microgravity facilities, the flames are limited in size. It is important, therefore, to investigate the significance of three-dimensional effects. Three-dimensional and two-dimensional simulations of ignition and subsequent transition to flame spread were performed on a thermally thin cellulosic sample. Ignition occurred by applying a radiant heat flue in a strip across the center of the sample. The sample was bounded by an inert sample holder. Heat loss effects at the interface of the sample and the sample holder were tested by varying the thermal-physical properties of the sample holder. Simulations were also conducted with samples of different widths and with different ambient wind speeds (i.e., different levels of oxygen supply). The width of the sample affected both the duration of the flame transition period and the post-transition flame spread rate. Finite width effects were most significant when the ambient wind was relatively small (limited oxygen supply). In such environments, the velocity due to thermal expansion reduced the net inflow of oxygen enough to significantly affect flame behavior. for a given sample width, the influence of thermal expansion on the net incoming oxygen supply decreased as the ambient wind speed increased. Thus, both the transition and flame spread behavior of the three-dimensional flame (along the centerline) tended to that of the two-dimensional flame with increasing ambient wind speed. Heat losses to the sample holder were found to affect the flame spread rate in the case of the narrowest sample with the slowest ambient wind.
Author: Sandra Lee Olson
Publisher:
ISBN:
Category :
Languages : en
Pages : 308
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Book Description
Author: Charles E. Baukal, Jr.
Publisher: Cambridge University Press
ISBN: 1108660886
Category : Technology & Engineering
Languages : en
Pages : 193
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Book Description
A Gallery of Combustion and Fire is the first book to provide a graphical perspective of the extremely visual phenomenon of combustion in full color. It is designed primarily to be used in parallel with, and supplement existing combustion textbooks that are usually in black and white, making it a challenge to visualize such a graphic phenomenon. Each image includes a description of how it was generated, which is detailed enough for the expert but simple enough for the novice. Processes range from small scale academic flames up to full scale industrial flames under a wide range of conditions such as low and normal gravity, atmospheric to high pressures, actual and simulated flames, and controlled and uncontrolled flames. Containing over 500 color images, with over 230 contributors from over 75 organizations, this volume is a valuable asset for experts and novices alike.
