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Author : J. R. Narayan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Effect of Turbulence-chemistry Interactions in Compressible Reacting Flows written by J. R. Narayan and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Borghi
Publisher : Springer Science & Business Media
ISBN 13 : 146139631X
Total Pages : 958 pages
Book Rating : 4.4/5 (613 download)
Download or read book Turbulent Reactive Flows written by R. Borghi and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulent reactive flows are of common occurrance in combustion engineering, chemical reactor technology and various types of engines producing power and thrust utilizing chemical and nuclear fuels. Pollutant formation and dispersion in the atmospheric environment and in rivers, lakes and ocean also involve interactions between turbulence, chemical reactivity and heat and mass transfer processes. Considerable advances have occurred over the past twenty years in the understanding, analysis, measurement, prediction and control of turbulent reactive flows. Two main contributors to such advances are improvements in instrumentation and spectacular growth in computation: hardware, sciences and skills and data processing software, each leading to developments in others. Turbulence presents several features that are situation-specific. Both for that reason and a number of others, it is yet difficult to visualize a so-called solution of the turbulence problem or even a generalized approach to the problem. It appears that recognition of patterns and structures in turbulent flow and their study based on considerations of stability, interactions, chaos and fractal character may be opening up an avenue of research that may be leading to a generalized approach to classification and analysis and, possibly, prediction of specific processes in the flowfield. Predictions for engineering use, on the other hand, can be foreseen for sometime to come to depend upon modeling of selected features of turbulence at various levels of sophistication dictated by perceived need and available capability.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Compressible Turbulent Reading Flows written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted under this grant to advance fundamental understanding and predictive models of turbulent reacting flows relevant to Air Force needs in high-speed propulsion Advanced computational schemes including direct numerical simulation (DNS) and large eddy simulation (LES) were used in addition to turbulent combustion theory. Reduced chemical mechanisms for hydrogen-air combustion were developed and tested. Specific flows investigated include the reacting shear layer and the jet. A new mechanism that relates the reduction in fuel/oxidant mixing in high-speed flows to the inhibited communication of pressure signals was proposed. A resulting compressibility model was found to give good predictions. Both mean density changes and Mach number were found to affect the flow development in high-speed combustion. It was found that the transport and molecular mixing of reactive scalars are substantially affected by heat release and must be accounted for in closures of turbulence/chemistry interaction. LES of a spatially-evolving jet were performed and successfully compared with our DNS and previous experiments. New subgrid scale models were developed for LES of nonequilibrium flows. The results obtained here should help improve current abilities to analyze and design propulsion systems that employ high-speed turbulent combustion.
Author : S. Murthy
Publisher : Springer Science & Business Media
ISBN 13 : 1461587387
Total Pages : 469 pages
Book Rating : 4.4/5 (615 download)
Download or read book Turbulent Mixing in Nonreactive and Reactive Flows written by S. Murthy and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbulence, mixing and the mutual interaction of turbulence and chemistry continue to remain perplexing and impregnable in the fron tiers of fluid mechanics. The past ten years have brought enormous advances in computers and computational techniques on the one hand and in measurements and data processing on the other. The impact of such capabilities has led to a revolution both in the understanding of the structure of turbulence as well as in the predictive methods for application in technology. The early ideas on turbulence being an array of complicated phenomena and having some form of reasonably strong coherent struc ture have become well substantiated in recent experimental work. We are still at the very beginning of understanding all of the aspects of such coherence and of the possibilities of incorporating such structure into the analytical models for even those cases where the thin shear layer approximation may be valid. Nevertheless a distinguished body of "eddy chasers" has come into existence. The structure of mixing layers which has been studied for some years in terms of correlations and spectral analysis is also getting better understood. Both probability concepts such as intermittency and conditional sampling as well as the concept of large scale structure and the associated strain seem to indicate possibilities of distinguishing and synthesizing 'engulfment' and molecular mixing.
Author : R. S. Cant
Publisher : Imperial College Press
ISBN 13 : 1860947786
Total Pages : 192 pages
Book Rating : 4.8/5 (69 download)
Download or read book An Introduction to Turbulent Reacting Flows written by R. S. Cant and published by Imperial College Press. This book was released on 2008 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides physical intuition and key entries to the body of literature. This book includes historical perspective of the theories.
Author : K. T. Yoon
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Compressible Turbulent Reacting Flows with Boundary Layer Interactions written by K. T. Yoon and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Graham V. Candler
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.3/5 (91 download)
Download or read book Interaction of Chemistry, Turbulence, and Shock Waves in Hypervelocity Flow written by Graham V. Candler and published by . This book was released on 1999 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant contributions were made in a four-year interdisciplinary experimental, numerical and theoretical program to extend the state of knowledge and understanding of the effects of chemical reactions in hypervelocity flows. The program addressed the key problems in aerothermochemistry that arise from the interaction between the three strongly nonlinear effects: Compressibility; vorticity; and chemistry. Results included: (1) Discovery of dramatic damping effects of nonequilibrium vibration and chemistry on transition in hypervelocity flows; (2) Proper formulation of parameters for reacting blunt-body flows. (3) Effects of nonequilibrium chemistry in shock-on-shock interaction; (4) New experiments on, and correlation with theory of high-enthalpy flap-induced separation; (5) Computations of interaction of a shock wave with density interfaces and with compressible Hill's spherical vortex; (6) Extensive clarification of phenomena in supersonic shear flows using new diagnostic and computational tools; (7) New experiments and computations of hypervelocity double-one flow yielded insights into vibration-dissociation coupling; (8) First-principles computations of electron collision cross-sections with diatomic molecules and CO2; and (9) Development of new diagnostic technique LITA for accurate non-intrusive point measurement of gas properties.
Author : Robert F. Mons
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (456 download)
Download or read book Chemical Reactions in Compressible Turbulent Mixing Flows written by Robert F. Mons and published by . This book was released on 1969 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P.A. Libby
Publisher : Springer
ISBN 13 : 9783662312568
Total Pages : 246 pages
Book Rating : 4.3/5 (125 download)
Download or read book Turbulent Reacting Flows written by P.A. Libby and published by Springer. This book was released on 2014-03-12 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carlos Pantano-Rubino
Publisher :
ISBN 13 :
Total Pages : 394 pages
Book Rating : 4.:/5 (318 download)
Download or read book Compressibility Effects in Turbulent Nonpremixed Reacting Shear Flows written by Carlos Pantano-Rubino and published by . This book was released on 2000 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Graham V. Candler
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.3/5 (91 download)
Download or read book Simulation of Turbulent Hypersonic Flows written by Graham V. Candler and published by . This book was released on 1997 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct numerical simulations of turbulent reacting flows were performed to study the interaction between chemical heat release and turbulent fluid motion. A portion of the energy released by exothermic reactions is placed in the compressible mode of turbulent kinetic energy, with very little energy disposed to the incompressible mode. This process results in a positive feedback mechanism, whereby temperature fluctuations are amplified by the chemical reactions. In the case of endothermic reactions, the feedback is negative, resulting in decreased turbulent motion. The results of the simulations were used to develop a model for temperature fluctuations under conditions typical of a hypersonic boundary layer. This model has been validated and is suitable for use in the large eddy simulation of hypersonic turbulent boundary layers.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)
Download or read book Interaction of Chemistry, Turbulence, and Shock Waves in Hypervelocity Flow written by and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant progress was made during the second year of an interdisciplinary experimental, numerical and theoretical program to extend the state of knowledge and understanding of the effects of chemical reactions in hypervelocity flows. The program addressed key problems in naerothermochemistry that arise from interactions between the three strongly nonlinear effects: Compressibility; vorticity; and chemistry. Important new results included: Clear understanding of the two important parameters that define hypervelocity flow over spheres. Closed-form solution for stand-off distance. Completion of computation of hollow-core compressible vortex streets. First high-resolution interferograms of shock-shock interaction in hypervelocity flow. Detailed experimental and theoretical study shows that high-enthalpy real-gas effects do not further increase heat flux in type IV Interaction. Interferograms establish flow quality in the hypervelocity shock tunnel T5. Upgrade of the Supersonic Shear Layer facility to higher Mach number. New results on supersonic shear layers and shear-layer/shock-wave interaction. Computational discovery of a flow field that is sensitive to vibration-dissociation coupling. Extension of the equilibrium flux method to a more robust less dissipative form and tests. Computation of collision cross section to electrons of low excited states of OH, NO, and CO2. Establishment of Laser-Induced Thermal Acoustics as an accurate diagnostic for gas properties over large pressure ranges. (AN).
Author : J. R. Narayan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book A Two-equation Turbulence Model for Compressible Reacting Flows written by J. R. Narayan and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Krishnendu Sinha
Publisher :
ISBN 13 :
Total Pages : 436 pages
Book Rating : 4.:/5 (319 download)
Download or read book Analysis of the K-epsilon Turbulence Models for Simulation of Compressible Flows written by Krishnendu Sinha and published by . This book was released on 2001 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Warren C. Strahle
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (216 download)
Download or read book Effects of Pressure in Turbulent Reacting Flows written by Warren C. Strahle and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rajesh Rawat
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (377 download)
Download or read book Modeling Finite-rate Chemistry in Turbulent Reacting Flows written by Rajesh Rawat and published by . This book was released on 1997 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. V. Candler
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.3/5 (91 download)
Download or read book Interaction of Chemistry, Turbulence and Shock Waves in Hypervelocity Flow written by G. V. Candler and published by . This book was released on 1994 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
