Author: Taekyu KangPublisher:
ISBN:
Category :
Languages : en
Pages : 118
Book Description
Methane Flame Propagation in a Compositionally Stratified Gas
Author: Taekyu KangExperimental and Theoretical Investigation of Flame Propagation Through Compositionally Stratified Methane -Air Mixtures
Author: Laminar Flame Propagation in Mixtures with Compositional Stratification at Small Length Scales
Author: David P. SchmidtPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The behavior and structure of laminar hydrocarbon flames which propagate parallel to the direction of a periodic gradient of mixture composition was studied both experimentally, using a specially designed burner, and computationally, using a planar numerical model. The variations in local mixture composition led to the formation of wrinkled flames, the structure of which were dependent on both chemical and physical parameters of the particular flame configuration. A qualitative study using chemiluminescence imaging of stratified methane and propane flames was conducted to characterize their response to variations in overall mixture composition, strength and length scale of the stratification, and flow field velocity. A two-dimensional numerical study was performed to assess the abilities of reduced global kinetic models to predict the behavior of stratified flames in comparison to computations performed using detailed mechanisms. It was observed that the reduced kinetic models display a lower limit of stratification length scale, which is on the order of the laminar flame thickness, below which accurate prediction of flame behavior is no longer possible. Under these conditions, the computed flames were observed to undergo a deformation which was much larger than the wrinkling imposed by the compositional variation, and was unsteady in time. Further analysis of these deformed flames suggested that a potential cause of this behavior was a failure of the reduced kinetics to capture the increase in local reaction rate attributed to stratification, and the inability of the driving reactions to counterbalance the incoming mass flux of fuel led to destabilization of the flame front. A preliminary analysis of the local stretch rates of the wrinkled flames was also conducted, and it was observed that even with a uniform incoming flow field, variations in mixture composition were capable of stretching the flames. The stretch behavior observed was one of alternating flame stretch and flame compression, which reached very large magnitudes over short distances.
Formation and Flammability of Stratified Methane-air Mixtures
Author: Henry E. PerleePublisher:
ISBN:
Category : Firedamp
Languages : en
Pages : 32
Book Description
Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States
Author: Propagation of Flame in Mixtures of Natural Gas and Air
Author: Hubert Frank CowardPublisher:
ISBN:
Category : Flame
Languages : en
Pages : 32
Book Description
Ignition and Flame Propagation Within Stratified Methane-air Mixtures Formed by Convective Diffusion [microform]
![Ignition and Flame Propagation Within Stratified Methane-air Mixtures Formed by Convective Diffusion [microform] PDF](https://books.google.com/books/content/images/frontcover/exJ8AAAACAAJ?fife=w80-h100)
Author: Hei Tung LamPublisher: National Library of Canada
ISBN: 9780315211186
Category : Diffusion
Languages : en
Pages : 256
Book Description
Natural Gas Engines
Author: Kalyan Kumar SrinivasanPublisher: Springer
ISBN: 9811333076
Category : Technology & Engineering
Languages : en
Pages : 428
Book Description
This book covers the various advanced reciprocating combustion engine technologies that utilize natural gas and alternative fuels for transportation and power generation applications. It is divided into three major sections consisting of both fundamental and applied technologies to identify (but not limited to) clean, high-efficiency opportunities with natural gas fueling that have been developed through experimental protocols, numerical and high-performance computational simulations, and zero-dimensional, multizone combustion simulations. Particular emphasis is placed on statutes to monitor fine particulate emissions from tailpipe of engines operating on natural gas and alternative fuels.
Hydrogen for Clean Energy Production: Combustion Fundamentals and Applications
Author: Medhat A. NemitallahPublisher: Springer Nature
ISBN: 9819779251
Category :
Languages : en
Pages : 461
Book Description
Flame Propagation in Mixtures of Natural Gas and of Methane with Air
Author: C. G. DunklePublisher:
ISBN:
Category : Carnegie Institute of Technology
Languages : en
Pages : 0
Book Description