Author: Surendra N. Singhal
Publisher:
ISBN:
Category :
Languages : en
Pages : 57
Book Description
Experiments emphasizying the extinction phenomena and the near-limit burning characteristics are performed on polymers, PMMA (Polymethylmethacrylate) and Delrin, using an Opposed-Jet Diffusion Flame apparatus. The measurements include burning rate and peak flame temperature and the variables are jet velocity and the oxidizer mole fraction. The measurements indicate the burning rate in the near-limit region departs from a power law relationship indicating the importance of finite rate chemical kinetics in this regime. Consistently, the peak flame temperature measurements prior to extinction show a sharp rate of decrease. Extinction does not occur on a sharp boundary in the oxygen mole fraction-jet velocity plane, but rather in a region (its size may depend on the experimental set-up and external disturbances) wherein extinction occurs in a random manner. The extinction statistics suggest that this is due to the quenching sensitivity of the near-limit flame to disturbances. Determination of chemical kinetic data using extinction 'boundary' is likely to have scatters due to the finiteness of the extinction region. It is suggested that matching of the burning rate curve in the near limit regime may give more reliable chemical kinetic data. (Author).
Flammability Study of Polymer Fuels Using Opposed-Jet Diffusion Flame Technique
Author: Surendra N. Singhal
Publisher:
ISBN:
Category :
Languages : en
Pages : 57
Book Description
Experiments emphasizying the extinction phenomena and the near-limit burning characteristics are performed on polymers, PMMA (Polymethylmethacrylate) and Delrin, using an Opposed-Jet Diffusion Flame apparatus. The measurements include burning rate and peak flame temperature and the variables are jet velocity and the oxidizer mole fraction. The measurements indicate the burning rate in the near-limit region departs from a power law relationship indicating the importance of finite rate chemical kinetics in this regime. Consistently, the peak flame temperature measurements prior to extinction show a sharp rate of decrease. Extinction does not occur on a sharp boundary in the oxygen mole fraction-jet velocity plane, but rather in a region (its size may depend on the experimental set-up and external disturbances) wherein extinction occurs in a random manner. The extinction statistics suggest that this is due to the quenching sensitivity of the near-limit flame to disturbances. Determination of chemical kinetic data using extinction 'boundary' is likely to have scatters due to the finiteness of the extinction region. It is suggested that matching of the burning rate curve in the near limit regime may give more reliable chemical kinetic data. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 57
Book Description
Experiments emphasizying the extinction phenomena and the near-limit burning characteristics are performed on polymers, PMMA (Polymethylmethacrylate) and Delrin, using an Opposed-Jet Diffusion Flame apparatus. The measurements include burning rate and peak flame temperature and the variables are jet velocity and the oxidizer mole fraction. The measurements indicate the burning rate in the near-limit region departs from a power law relationship indicating the importance of finite rate chemical kinetics in this regime. Consistently, the peak flame temperature measurements prior to extinction show a sharp rate of decrease. Extinction does not occur on a sharp boundary in the oxygen mole fraction-jet velocity plane, but rather in a region (its size may depend on the experimental set-up and external disturbances) wherein extinction occurs in a random manner. The extinction statistics suggest that this is due to the quenching sensitivity of the near-limit flame to disturbances. Determination of chemical kinetic data using extinction 'boundary' is likely to have scatters due to the finiteness of the extinction region. It is suggested that matching of the burning rate curve in the near limit regime may give more reliable chemical kinetic data. (Author).
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 836
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 836
Book Description
ERDA Energy Research Abstracts
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 724
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 724
Book Description
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1470
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1470
Book Description
ERDA Energy Research Abstracts
Author: United States. Energy Research and Development Administration
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1030
Book Description
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1030
Book Description
ERDA Energy Research Abstracts
Author: United States. Energy Research and Development Administration
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 576
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 576
Book Description
Society of Plastics Engineers Annual Technical Conference
Author: Society of Plastics Engineers
Publisher:
ISBN:
Category : Plastics
Languages : en
Pages : 768
Book Description
Publisher:
ISBN:
Category : Plastics
Languages : en
Pages : 768
Book Description
Papers of the Meetings
Author: Combustion Institute Western States Section
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 852
Book Description
Publisher:
ISBN:
Category : Combustion
Languages : en
Pages : 852
Book Description
Air Pollution Abstracts
Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 1078
Book Description
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 1078
Book Description
International Aerospace Abstracts
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1044
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1044
Book Description