Effects of Strain, Vorticity, and Turbulence on Premixed Flames PDF Download
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Author: Christopher J. Rutland
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
The laminar flame problem is solved using a phase plane method.
Author: Christopher J. Rutland
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
The laminar flame problem is solved using a phase plane method.
Author: Nedunchezhian Swaminathan
Publisher: Cambridge University Press
ISBN: 1139498584
Category : Technology & Engineering
Languages : en
Pages : 447
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Book Description
A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flames must play a central role in the fundamental science of these new concepts. Lean premixed flames have the potential to offer ultra-low emission levels, but they are notoriously susceptible to combustion oscillations. Thus, sophisticated control measures are inevitably required. The editors' intent is to set out the modeling aspects in the field of turbulent premixed combustion. Good progress has been made on this topic, and this cohesive volume contains contributions from international experts on various subtopics of the lean premixed flame problem.
Author: N. Swaminathan
Publisher: Cambridge University Press
ISBN: 1108572758
Category : Technology & Engineering
Languages : en
Pages :
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Book Description
Explore a thorough and up to date overview of the current knowledge, developments and outstanding challenges in turbulent combustion and application. The balance among various renewable and combustion technologies are surveyed, and numerical and experimental tools are discussed along with recent advances. Covers combustion of gaseous, liquid and solid fuels and subsonic and supersonic flows. This detailed insight into the turbulence-combustion coupling with turbulence and other physical aspects, shared by a number of the world leading experts in the field, makes this an excellent reference for graduate students, researchers and practitioners in the field.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
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Book Description
Large-scale strain rate field, a resolved quantity which is easily computable in large-eddy simulations (LES), could have profound effects on the premixed flame properties by altering the turbulent flame speed and inducing local extinction. The role of the resolved strain rate has been investigated in a posterior LES study of GE lean premixed dry low NOx emissions LM6000 gas turbine combustor model. A novel approach which is based on the coupling of the lineareddy model with a one-dimensional counter-flow solver has been applied to obtain the parameterizations of the resolved premixed flame properties in terms of the reactive progress variable, the local strain rate measure, and local Reynolds and Karlovitz numbers. The strain rate effects have been analyzed by comparing LES statistics for several models of the turbulent flame speed, i.e, with and without accounting for the local strain rate effects, with available experimental data. The sensitivity of the simulation results to the inflow velocity conditions as well as the grid resolution have been also studied. Overall, the results suggest the necessity to represent the strain rate effects accurately in order to improve LES modeling of the turbulent flame speed.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Songwei Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Book Description
Author: Andrei Lipatnikov
Publisher: CRC Press
ISBN: 1466510250
Category : Science
Languages : en
Pages : 548
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Book Description
Lean burning of premixed gases is considered to be a promising combustion technology for future clean and highly efficient gas turbine combustors. Yet researchers face several challenges in dealing with premixed turbulent combustion, from its nonlinear multiscale nature and the impact of local phenomena to the multitude of competing models. Filling
Author: Thierry Baritaud
Publisher: Editions TECHNIP
ISBN: 9782710806981
Category : Science
Languages : en
Pages : 328
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Book Description
Contents: Description of accurate boundary conditions for the simulation of reactive flows. Parallel direct numerical simulation of turbulent reactive flow. Flame-wall interaction and heat flux modelling in turbulent channel flow. A numerical study of laminar flame wall interaction with detailed chemistry: wall temperature effects. Modeling and simulation of turbulent flame kernel evolution. Experimental and theoretical analysis of flame surface density modelling for premixed turbulent combustion. Gradient and counter-gradient transport in turbulent premixed flames. Direct numerical simulation of turbulent flames with complex chemical kinetics. Effects of curvature and unsteadiness in diffusion flames. Implications for turbulent diffusion combustion. Numerical simulations of autoignition in turbulent mixing flows. Stabilization processes of diffusion flames. References.
Author: Dietrich Stauffer
Publisher: World Scientific
ISBN: 9814497274
Category : Science
Languages : en
Pages : 320
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Book Description
In this fifth volume of the authoritative series, the simulation of forest fires, flames, and hydrodynamics is presented in the first three articles. The next two deal with quantum simulations, in particular for two dimensions (quantum Hall effect and monolayers). Biology is connected with the last two articles: we learn from biological evolution to complement computer hardware and software with evolware, or we simulate immunology.
Author: Cal Rising
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Book Description
Modern propulsion and power generation technology operates under highly turbulent conditions to promote increased efficiency. The coupled relationship between the turbulence conditions and imposed pressure gradients on reacting flow dynamics are explored by decomposing the vorticity transport terms to quantify the vorticity budgets under varying conditions. This is performed on a bluff-body reacting flow-field by utilizing the two-dimensional diagnostics of particle image velocimetry (PIV) and CH* chemiluminescence to allow for a resolved velocity field and flame front. The vorticity budget is determined by utilizing a mean conditional fluid element tracking procedure to quantify the evolution of the individual vorticity terms through the flame front.
