Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
The Effect Of Strain Rate On The Temperature Field Structure In A Turbulent Non Premixed Flame Using Planar Rayleigh Scattering
Download The Effect Of Strain Rate On The Temperature Field Structure In A Turbulent Non Premixed Flame Using Planar Rayleigh Scattering full books in PDF, epub, and Kindle. Read online The Effect Of Strain Rate On The Temperature Field Structure In A Turbulent Non Premixed Flame Using Planar Rayleigh Scattering ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis The Effect of Strain Rate on the Temperature Field Structure in a Turbulent Non-premixed Flame Using Planar Rayleigh Scattering by : David Alan Everest
Download or read book The Effect of Strain Rate on the Temperature Field Structure in a Turbulent Non-premixed Flame Using Planar Rayleigh Scattering written by David Alan Everest and published by . This book was released on 1994 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lean Premixed Flame Structure in Intense Turbulence by : Sastri Purushottama Nandula
Download or read book Lean Premixed Flame Structure in Intense Turbulence written by Sastri Purushottama Nandula and published by . This book was released on 2003 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of the Dynamics and Structure of Lean-premixed Turbulent Combustion by : Frank Tat Cheong Yuen
Download or read book Experimental Investigation of the Dynamics and Structure of Lean-premixed Turbulent Combustion written by Frank Tat Cheong Yuen and published by . This book was released on 2009 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent premixed propane/air and methane/air flames were studied using planar Rayleigh scattering and particle image velocimetry on a stabilized Bunsen type burner. The fuel-air equivalence ratio was varied from &phis; = 0:7 to 1.0 for propane flames, and from &phis; = 0:6 to 1.0 for methane flames. The non-dimensional turbulence intensity, u'/ SL (ratio of fluctuation velocity to laminar burning velocity), covered the range from 3 to 24, equivalent to conditions of corrugated flamelets and thin reaction zones regimes. Temperature gradients decreased with the increasing u'/SL and levelled off beyond u'/SL > 10 for both propane and methane flames. Flame front thickness increased slightly as u'/SL increased for both mixtures, although the thickness increase was more noticeable for propane flames, which meant the thermal flame front structure was being thickened. A zone of higher temperature was observed on the average temperature profile in the preheat zone of the flame front as well as some instantaneous temperature profiles at the highest u'/SL. Curvature probability density functions were similar to the Gaussian distribution at all u'/ SL for both mixtures and for all the flame sections. The mean curvature values decreased as a function of u'/ SL and approached zero. Flame front thickness was smaller when evaluated at flame front locations with zero curvature than that with curvature. Temperature gradients and FSD were larger when the flame curvature was zero. The combined thickness and FSD data suggest that the curvature effect is more dominant than that of the stretch by turbulent eddies during flame propagation. Integrated flame surface density for both propane and methane flames exhibited no dependance on u'/S L regardless of the FSD method used for evaluation. This observation implies that flame surface area may not be the dominant factor in increasing the turbulent burning velocity and the flamelet assumption may not be valid under the conditions studied. Dkappa term, the product of diffusivity evaluated at conditions studied and the flame front curvature, was a magnitude smaller than or the same magnitude as the laminar burning velocity.
Book Synopsis Effects of Strain, Vorticity, and Turbulence on Premixed Flames by : Christopher J. Rutland
Download or read book Effects of Strain, Vorticity, and Turbulence on Premixed Flames written by Christopher J. Rutland and published by . This book was released on 1989 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laminar flame problem is solved using a phase plane method.
Book Synopsis Planar Laser Induced Fluorescence Images of Fuel Mixing and the Reaction Zone in a Supersonic Combustor by : Rodney Aldibonti Bryant
Download or read book Planar Laser Induced Fluorescence Images of Fuel Mixing and the Reaction Zone in a Supersonic Combustor written by Rodney Aldibonti Bryant and published by . This book was released on 1998 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Crossed-plane Imaging for Three-dimensional Analysis of Premixed Turbulent Flames by : Darin Alan Knaus
Download or read book Application of Crossed-plane Imaging for Three-dimensional Analysis of Premixed Turbulent Flames written by Darin Alan Knaus and published by . This book was released on 2003 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Thermal Flame Structure in Lean Turbulent Premixed Methane-air Flames by Rayleigh Scattering by : Natalie Galley
Download or read book Investigation of Thermal Flame Structure in Lean Turbulent Premixed Methane-air Flames by Rayleigh Scattering written by Natalie Galley and published by . This book was released on 2006 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flame front structure in turbulent premixed methane-air and propane-air flames was investigated. Flame images were obtained using Rayleigh scattering on an axisymmetric Bunsen-type burner. Normalized turbulence intensity, u'/SL, was varied from 3.4 to 15.92 for methane-air flames, and 3.31 to 8.61 for propane-air flames. Instantaneous thermal flame thicknesses and gradients were found from normal temperature profiles. For methane-air flames, flame front thickness decreased as equivalence ratio increased and preheat zone and reaction zone thicknesses increased slightly as u'/SL increased. When normalized by laminar flame values, the thicknesses decreased. Strain was found to play an unimportant role in determining flame front thickness. Fewer than 30 profiles were found that exhibit a temperature Bump in the low temperature region of the profile, indicating that turbulent eddies convecting heated matter into the preheat zone probably do not cause the change in the preheat zone structure. For propane-air flames preliminary results are presented.
Book Synopsis Turbulent Premixed Flames by : Nedunchezhian Swaminathan
Download or read book Turbulent Premixed Flames written by Nedunchezhian Swaminathan and published by Cambridge University Press. This book was released on 2011-04-25 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Application of Rayleigh Scattering to Turbulent Flow with Heat Transfer and Combustion by : L. Talbot
Download or read book Application of Rayleigh Scattering to Turbulent Flow with Heat Transfer and Combustion written by L. Talbot and published by . This book was released on 1987 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive investigation has been carried out of the structure and statistical properties of unconfined turbulent flames, both V-shaped and conical. Measurement techniques included conditioned velocity measurements using two component LDV, flow visualization techniques, and Rayleigh scattering. Additionally, a new time resolved technique, LARS(Linear Array for Rayleigh Scattering) was developed which makes possible the determination of the instantaneous location of the flame sheet within the turbulent flame brush. A major objective of these flame studies was to access the appropriateness of models such as the Bray-Moss-Libby (BLM) model for describing the structure of planar turbulent combustion zones. The results of these investigation have revealed that many of the predictions of the BML model accord reasonably well with experimental observations, although some of the constants chosen in the theory are not verified experimentally. Agreement is better for the V-shaped planar flame than for the conical flame, particularly in the vicinity of the flame tip. Studies of the flame stabilization region in the wake of flameholders showed evidence of vortex shedding in the wake and of diminished fluctuation intensity with increased heat release. It was also observed that reaction in the shear layer bounding the recirculating products does not occur until a finite distance downstream of the flameholder. This observation is confirmed by CH fluorescence imaging of the flame region.
Book Synopsis A Study of Strain Rate Effects for Turbulent Premixed Flames with Application to LES of a Gas Turbine Combustor Model by :
Download or read book A Study of Strain Rate Effects for Turbulent Premixed Flames with Application to LES of a Gas Turbine Combustor Model written by and published by . This book was released on 2015 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Turbulent Combustion by : Norbert Peters
Download or read book Turbulent Combustion written by Norbert Peters and published by Cambridge University Press. This book was released on 2000-08-15 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards by :
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2000 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
