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Laser Diagnostic Development And Measurement And Modeling Of Turbulent Flowfields Of Jets And Wakes Part Ii
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Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes. Part II by : L. Krishnamurthy
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes. Part II written by L. Krishnamurthy and published by . This book was released on 1983 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes by : A. J. Lightman
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes written by A. J. Lightman and published by . This book was released on 1983 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-dimensional laser Doppler anemometer was designed to take measurements in a ducted coaxial flow system having a centerbody separating the jets. The measurements, made in isothermal flow, can be categorized as: central jet only (C02); annular jet only (air); and, combined central and annular jet flow. Radial profiles of the axial and radial/azimuthal velocity were obtained. The central jet only condition approximates a free jet since the central jet diameter is much smaller than the centerbody or duct diameter (1:29.3: 53.2). Measurements of the jet development (diameter, turbulence intensity, etc.) were compared with previous free jet studies. In a study of the isotropy of the turbulent fluctuations it was determined that fully developed turbulent flow begins further downstream than anticipated. Velocity profiles were combined with gas sampling measurements to ascertain jet entrainment. Results show a linear growth of the entrained mass starting at the entrance plane. Downstream (20 diameters) the rate of growth increases to match past studies in that region. The annular jet flow creates a recirculation vortex in the wake of the centerbody. The flowfield was mapped and the streamlines describing the flow were obtained throughout the recirculating flow and further downstream. The location and strength of the vortex center was determined. Velocity scanes were combined to obtain profiles of the average radial and azimuthal components that were directly measured. The interaction of the recirculating annular air jet and the central get was examined. Profiels of the velocity field were obtained for several central jet flow conditions. A normalization plot of the location of the central jet stagnation location agreed well with earlier measurements using a one-dimensional laser doppler anemometer and a different central jet nozzle.
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes by : L. Krishnamurthy
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes written by L. Krishnamurthy and published by . This book was released on 1983 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite-difference numerical computations are presented to predict the isothermal, turbulent, recirculating flowfields in a centerbody combustor configuration which involves confined dual coaxial jet mixing in the near-wake region of an axisymmetric bluff body. Calculations based upon the Reynolds-averaged Navier-Stokes equations and the k-epsilon turbulence model consider the influence of the annular and central flow rates on the nature of the flowfield downstream of the bluff body. The reported isothermal modeling calculations are performed with the 'Teaching Elliptic Axisymmetrical Characteristics Heuristically' (TEACH) Code. Numerical results show the influence of the annular and central jet flow rates on the distributions of the mean and rms velocity fields and centerline locations of stagnation points. The sensitivity of the predicted results to several aspects of the modeling is considered. The predicted results demonstrate the complexity of flowfield interactions in the near-wake region and refine the understanding of the centerbody combustor flowfields. The character of the recirculating flowfield emerging from the numerical predictions when the near-wake is dominated by the annular jet is in conformity with experimental observations.
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes by : S. O. Park
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes written by S. O. Park and published by . This book was released on 1983 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite-difference numerical computations are presented to predict the isothermal, turbulent, recirculating flowfields in a centerbody combustor configuration which involves confined dual coaxial jet mixing in the near-wake region of an axisymmetric bluff body. Calculations based upon the Reynolds-averaged Navier-Stokes equations and the k-epsilon turbulence model consider the influence of the annular and central flow rates on the nature of the flowfield downstream of the bluff body. The reported isothermal modeling calculations are performed with the 'Teaching Elliptic Axisymmetrical Characteristics Heuristically' (TEACH) Code. Numerical results show the influence of the annular and central jet flow rates on the distributions of the mean and rms velocity fields and centerline locations of stagnation points. The sensitivity of the predicted results to several aspects of the modeling is considered. The predicted results demonstrate the complexity of flowfield interactions in the near-wake region and refine the understanding of the centerbody combustor flowfields. The character of the recirculating flowfield emerging from the numerical predictions when the near-wake is dominated by the annular jet is in conformity with experimental observations.
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes by : P. P. Yaney
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes written by P. P. Yaney and published by . This book was released on 1983 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and performance of a photon counting, two-channel spectroscopic system using the 6-W, 448-nm line of a cw argon ion laser is described. The two channels are formed by use of cylindrical optics and special slit mirrors set up following the exit slit of a conventional double spectrometer. The system is capable of dynamic, simultaneous measurements of either the concentrations of two gas species in cold flow or the temperature and concentration of a single gas species, such as N2, in a flame. Measurements are accomplished by recording the intensities of two spontaneous rotational Raman lines with spectral bandwidths between 0.04 and 0.08 nm. Up to 4096 samples (or reads from each of the two channels) can be recorded by a dedicated minicomputer at rates up to 10 kHz. Studies of a CH4 diffusion flame at sampling rates of 20 to 100 Hz and a room-temperature, axisymmetric C02 jet at rates up to 2.0 kHz were carried out. Analysis of the data from these studies include mean and rms profiles, probability density functions (pdf's), power spectral density functions, autocorrelation functions, cross correlation functions, and determinations of skewness and kurtosis in the pdf's and the C02 fluctuations.
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes. Part 3. The Development of a Two-Channel CW Time-Resolved Laser Raman Spectroscopy (TiLaRS) System for Measurements in Gas Flowfields by : P. P. Yaney
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes. Part 3. The Development of a Two-Channel CW Time-Resolved Laser Raman Spectroscopy (TiLaRS) System for Measurements in Gas Flowfields written by P. P. Yaney and published by . This book was released on 1983 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and performance of a photon counting, two-channel spectroscopic system using the 6-W, 448-nm line of a cw argon ion laser is described. The two channels are formed by use of cylindrical optics and special slit mirrors set up following the exit slit of a conventional double spectrometer. The system is capable of dynamic, simultaneous measurements of either the concentrations of two gas species in cold flow or the temperature and concentration of a single gas species, such as N2, in a flame. Measurements are accomplished by recording the intensities of two spontaneous rotational Raman lines with spectral bandwidths between 0.04 and 0.08 nm. Up to 4096 samples (or reads from each of the two channels) can be recorded by a dedicated minicomputer at rates up to 10 kHz. Studies of a CH4 diffusion flame at sampling rates of 20 to 100 Hz and a room-temperature, axisymmetric C02 jet at rates up to 2.0 kHz were carried out. Analysis of the data from these studies include mean and rms profiles, probability density functions (pdf's), power spectral density functions, autocorrelation functions, cross correlation functions, and determinations of skewness and kurtosis in the pdf's and the C02 fluctuations.
Book Synopsis Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes by :
Download or read book Laser Diagnostic Development and Measurement and Modeling of Turbulent Flowfields of Jets and Wakes written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1978 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Flow & particle diagnostics written by and published by . This book was released on 1987 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Measurements and Techniques in Turbulent Reactive and Non-reactive Flows by : Ronald M. C. So
Download or read book Experimental Measurements and Techniques in Turbulent Reactive and Non-reactive Flows written by Ronald M. C. So and published by . This book was released on 1984 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME Technical Papers written by and published by . This book was released on with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA 85-1096 - AIAA 85-1150 written by and published by . This book was released on 1985 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA 84-0351 - 84-0400 written by and published by . This book was released on 1984 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
