An Experimental And Theoretical Investigation Of Confined Two Stream Variable Density Turbulent Jet Mixing With Recirculation
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An Experimental And Theoretical Investigation Of Confined Two Stream Variable Density Turbulent Jet Mixing With Recirculation
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Author : Roy James Schulz
language : en
Publisher:
Release Date : 1976
An Experimental And Theoretical Investigation Of Confined Two Stream Variable Density Turbulent Jet Mixing With Recirculation written by Roy James Schulz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
An Investigation Of Ducted Two Stream Variable Density Turbulent Jet Mixing With Recirculation
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Author : Roy J. Schulz
language : en
Publisher:
Release Date : 1977
An Investigation Of Ducted Two Stream Variable Density Turbulent Jet Mixing With Recirculation written by Roy J. Schulz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Jets categories.
An investigation was conducted of two-stream, variable-density, turbulent jet mixing with recirculation confined within an axisymmetric duct that simulated a combustor configuration. The recirculating flow fields in the combustor simulator were the result of coaxial jet mixing between a central, primary air stream with a velocity of about 650 ft/sec and an annular secondary stream of hydrogen with velocities of 13, 23, or 48 ft/sec, depending on the desired test conditions. Experimental measurements are presented of radial distributions of time-averaged axial velocity and hydrogen mass fraction, axial distributions of time-averaged static pressure on the duct wall, axial velocity on the duct centerline, and hydrogen mass fraction on the duct wall and on the duct centerline. A theoretical study of the experimental flows was also conducted using a finite difference numerical solution technique for the calculation of viscous, recirculating flows. Comparison of theory and experiment shows that the predictive technique and the turbulence transport model require further development before accurate prediction of recirculating turbulent flows can be realized.
An Investigation Of Ducted Two Stream Variable Density Turbulent Jet Mixing With Recirculation
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Author :
language : en
Publisher:
Release Date : 1977
An Investigation Of Ducted Two Stream Variable Density Turbulent Jet Mixing With Recirculation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
An investigation was conducted of two-stream, variable-density, turbulent jet mixing with recirculation confined within an axisymmetric duct that simulated a combustor configuration. The recirculating flow fields in the combustor simulator were the result of coaxial jet mixing between a central, primary air stream with a velocity of about 650 ft/sec and an annular secondary stream of hydrogen with velocities of 13, 23, or 48 ft/sec, depending on the desired test conditions. Experimental measurements are presented of radial distributions of time-averaged axial velocity and hydrogen mass fraction, axial distributions of time-averaged static pressure on the duct wall, axial velocity on the duct centerline, and hydrogen mass fraction on the duct wall and on the duct centerline. A theoretical study of the experimental flows was also conducted using a finite difference numerical solution technique for the calculation of viscous, recirculating flows. Comparison of theory and experiment shows that the predictive technique and the turbulence transport model require further development before accurate prediction of recirculating turbulent flows can be realized.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1985
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Aeronautics categories.
An Experimental Investigation Of Ducted Reactive Turbulent Jet Mixing With Recirculation
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Author : D. E. Chriss
language : en
Publisher:
Release Date : 1977
An Experimental Investigation Of Ducted Reactive Turbulent Jet Mixing With Recirculation written by D. E. Chriss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Gas flow categories.
An experimental investigation of ducted, two stream, subsonic, reactive, turbulent jet mixing with recirculation was conducted. A primary jet of air at a mass flow rate of 0.075 lb/sec and velocity of 700 ft/sec was surrounded by an outer, low velocity, hydrogen stream. Data were obtained with hydrogen-air ratios of 0.143 and 0.107. The duct-to-inner nozzle diameter ratio was ten. Radial distributions of hydrogen mass fraction, mean axial velocity, turbulence intensity, and total pressure as well as axial distributions of wall hydrogen mass fraction and wall static pressure are presented for axial stations from one-half to five duct diameters from the nozzle exit plane. Comparison of the experimental data with calculations assuming frozen or equilibrium chemistry indicate that he measured velocity, pressure, and composition data are, in general, self-consistent. The maximum turbulent intensities which occurred in the center of the mixing layer and within the recirculation eddy were very high having values of 20 percent of the jet exit velocity. The velocity and composition field indicate that, while and mixing in the reactive flow field is slower than for the nonreactive case, the reaction had little effect on the size and location of the recirculation zone within the mixing duct.
Theoretical And Experimental Investigations On The Mixing Of Isoenergetic Confined Co Axial Jets
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Author : W. Tabakoff
language : en
Publisher:
Release Date : 1970
Theoretical And Experimental Investigations On The Mixing Of Isoenergetic Confined Co Axial Jets written by W. Tabakoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
A survey of experimental results for turbulent mixing between two compressible streams in a constant area duct is presented. The experimental results are for area ratios 3 and 7.16, for velocity ratios ranging from 0.4 to 2.8, and with velocity magnitudes varying from 200 ft/sec. to 950 ft/sec. A new constant of turbulence is recommended for the theoretical analysis of the confined jet mixing which uses the free jet mixing concepts. The regions in which this analysis could be used are delineated. (Author).
An Experimental Investigation Of Confined Multiple Turbulent Jet Mixing With Recirculation
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Author : Ashoke Ghosh
language : en
Publisher:
Release Date : 1984
An Experimental Investigation Of Confined Multiple Turbulent Jet Mixing With Recirculation written by Ashoke Ghosh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Combustion chambers categories.
An Experimental Investigation Of Ducted Reactive Turbulent Jet Mixing With Recirculation
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Author :
language : en
Publisher:
Release Date : 1977
An Experimental Investigation Of Ducted Reactive Turbulent Jet Mixing With Recirculation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
An experimental investigation of ducted, two stream, subsonic, reactive, turbulent jet mixing with recirculation was conducted. A primary jet of air at a mass flow rate of 0.075 lb/sec and velocity of 700 ft/sec was surrounded by an outer, low velocity, hydrogen stream. Data were obtained with hydrogen-air ratios of 0.143 and 0.107. The duct-to-inner nozzle diameter ratio was ten. Radial distributions of hydrogen mass fraction, mean axial velocity, turbulence intensity, and total pressure as well as axial distributions of wall hydrogen mass fraction and wall static pressure are presented for axial stations from one-half to five duct diameters from the nozzle exit plane. Comparison of the experimental data with calculations assuming frozen or equilibrium chemistry indicate that he measured velocity, pressure, and composition data are, in general, self-consistent. The maximum turbulent intensities which occurred in the center of the mixing layer and within the recirculation eddy were very high having values of 20 percent of the jet exit velocity. The velocity and composition field indicate that, while and mixing in the reactive flow field is slower than for the nonreactive case, the reaction had little effect on the size and location of the recirculation zone within the mixing duct.
An Experimental Investigation Of Reactive Turbulent Recirculating Jet Mixing
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Author : G. D. Smith
language : en
Publisher:
Release Date : 1980
An Experimental Investigation Of Reactive Turbulent Recirculating Jet Mixing written by G. D. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
An experimental investigation of ducted, two-stream, subsonic, turbulent jet mixing with recirculation was conducted. A primary jet of air at a mass flow rate of 0.580 1bm/sec and bulk velocity of 335 ft/sec was surrounded by an outer hydrogen stream at a mass flow rate of 0.002 1bm/sec and bulk velocity of 3 ft/sec (overall equivalence ratio of 0.12). The ratio of the duct to inner nozzle diameter was 2.5. Radial distributions of mean axial and radial velocity, axial and radial turbulence intensity, velocity cross correlation, gas composition, static temperature, and total pressure, as well as axial distribution of wall static pressure, are presented for axial stations from zero to six duct diameters from the nozzle exit plane, both with and without chemical reactions. The maximum turbulent intensities which occurred in the center of the mixing layer and within the recirculation eddy were very high, having values in excess of 20 percent of the jet exit velocity. The data clearly indicate that the mixing is slower in the chemically reactive flow field than in the nonreactive flow field and that the presence of chemical reactions had a significant effect on the size and location of the recirculation zone within the mixing duct. (Author).
92 2995 92 3034
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Author :
language : en
Publisher:
Release Date : 1992
92 2995 92 3034 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Fluid dynamics categories.