Analysis Of An Axisymmetrical Turbulent Pulsating Jet
DOWNLOAD
Download Analysis Of An Axisymmetrical Turbulent Pulsating Jet PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Analysis Of An Axisymmetrical Turbulent Pulsating Jet book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Analysis Of An Axisymmetrical Turbulent Pulsating Jet
DOWNLOAD
Author : D. Olivari
language : en
Publisher:
Release Date : 1974
Analysis Of An Axisymmetrical Turbulent Pulsating Jet written by D. Olivari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Jets categories.
Analysis Of Axisymmetric Free Turbulent Rotating Jets
DOWNLOAD
Author : Nehemiah A. Chigier
language : en
Publisher:
Release Date : 1966
Analysis Of Axisymmetric Free Turbulent Rotating Jets written by Nehemiah A. Chigier and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
Scientific And Technical Aerospace Reports
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1992
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 1992 with Aeronautics categories.
A Study Of Axisymmetric Submerged Semi Turbulent Jets
DOWNLOAD
Author : Mohamed Nezam El Sayed Aly
language : en
Publisher:
Release Date : 1977
A Study Of Axisymmetric Submerged Semi Turbulent Jets written by Mohamed Nezam El Sayed Aly 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.
On A General Similarity Analysis For Turbulent Jet And Wake Flows
DOWNLOAD
Author : Eduard Naudascher
language : en
Publisher:
Release Date : 1967
On A General Similarity Analysis For Turbulent Jet And Wake Flows written by Eduard Naudascher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Turbulence categories.
The development of any inhomogeneous free-turbulence flow in an incompressible fluid is predicted through the use of a general self-preservation hypothesis. The analytical solutions are verified by comparison with experimental data on mean-flow and turbulence characteristics of plane and axisymmetric jets in coaxial parallel flow with and without confinement, of an axisymmetric jet in a cross flow, and of the wake behind a self-propelled body. Emphasis is placed on the distinct turbulence structure of the various flows as revealed by the different axial variations of a shear parameter relating turbulence shear to mean velocity. The satisfactory predictions obtained by the new approach make it appear to have a more general application (e.g., to plumes and wall jets) than the examples chosen might imply. (Author).
A Study Of Axisymmetric Submerged Semi Turbulent Jets
DOWNLOAD
Author : El Sayed Aly, Mohamed Nezam
language : en
Publisher: 1977 [c1977]
Release Date : 1977
A Study Of Axisymmetric Submerged Semi Turbulent Jets written by El Sayed Aly, Mohamed Nezam and has been published by 1977 [c1977] this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
Steady And Pulsating Two Dimensional Turbulent Wall Jets In A Uniform Stream
DOWNLOAD
Author : August Verhoff
language : en
Publisher:
Release Date : 1970
Steady And Pulsating Two Dimensional Turbulent Wall Jets In A Uniform Stream written by August Verhoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Jets categories.
For the case of the steady, plane turbulent wall jet, the growth of the jet and decay of maximum velocity are predicted based upon the assumption that the shear stress distribution as well as the velocity distribution across the jet remain similar over the useful range of downstream positions. A suggested form for the velocity distribution is compared with the experimental results of this investigation and with the results of several previous investigators. The approach used in the analysis of the plane turbulent wall jet is then extended to the more general case of a steady turbulent wall jet beneath a secondary uniform stream. The experimental results of this investigation and other previous investigations are compared with the velocity profiles as predicted by the analysis. The case of a pulsating wall jet flow field was also analyzed; a simplified theoretical model is presented based upon the experimentally observed discrete vortex pattern produced by the unsteady jet. The analysis for both zero and nonzero secondary flow velocity relies to a large extent on many of the results of potential flow theory and the known characteristics of turbulent vortex structure. Experimental data consisting of instantaneous velocity measurements obtained by means of a hot-wire anemometer system and information obtained from visual flow field studies are compared with the results of the theoretical analysis. (Author).
Analysis Of The Injection Of A Heated Turbulent Jet Into A Cross Flow
DOWNLOAD
Author : James Franklin Campbell
language : en
Publisher:
Release Date : 1973
Analysis Of The Injection Of A Heated Turbulent Jet Into A Cross Flow written by James Franklin Campbell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Jets categories.
An investigation has been undertaken to develop a theoretical model of the incompressible jet injection process. The discharge of a turbulent jet into a cross flow was mathematically modeled by using an integral method which accounts for natural fluid mechanisms such as turbulence, entrainment, buoyancy, and heat transfer. The analytical results are supported by experimental data and demonstrate the usefulness of the theory for estimating the trajectory and flow properties of the jet for a variety of injection conditions. The capability of predicting jet flow properties, as well as two- and three- dimensional jet paths, was enhanced by obtaining the jet cross-sectional area during the solution of the conservation equations (a number of previous studies assume a specific growth for the area). Realistic estimates of temperature in the jet fluid were acquired by accounting for heat losses in the jet flow due to forced convection and to entrainment of free-stream fluid into the jet.
The Dynamics Of An Axisymmetric Turbulent Jet And Of A Passive Scalar Patch In Ambient Turbulence Interpreted From The Passive Scalar Field Statistics
DOWNLOAD
Author : Rana Sahebjam
language : en
Publisher:
Release Date : 2022
The Dynamics Of An Axisymmetric Turbulent Jet And Of A Passive Scalar Patch In Ambient Turbulence Interpreted From The Passive Scalar Field Statistics written by Rana Sahebjam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
"The passive scalar field of an axisymmetric turbulent jet and an isokinetic jet in an approximately homogeneous isotropic turbulence (HIT) with negligible mean flow is studied experimentally. The present research builds on that of Khorsandi et al. 2013 and Perez-Alvarado 2016, who studied the velocity field and the passive scalar field of an axisymmetric turbulent jet in a turbulent ambient, respectively. The primary objective is to deduce the jet structure, and to study the jet mixing in the HIT ambient by following the meandering path of the jet, i.e. conditional on the jet centroid. The secondary objective, complementing the first, is to study the diffusion of a momentumless patch of a passive scalar in the HIT ambient.The effect of a turbulent ambient on the dynamics and mixing of the passive scalar field of an axisymmetric turbulent jet is investigated. The experiments were conducted either in a quiescent or a turbulent ambient. The turbulent ambient was generated by a random jet array to achieve an approximately zero-mean-flow HIT ambient in the measurement plane. Two jet Reynolds numbers of Re = 5800 and 10600 were studied. Planar laser-induced fluorescence was used to measure the concentrations of the passive scalar dye (Sc = 2000) at orthogonal cross-sections of the jet at axial distances of x/d = 20, 30, 40, 50, 60. The statistics of the passive scalar field were conditioned on the jet centroid and were compared to the Eulerian statistics and to those of the jet in a quiescent ambient. The use of the centroidal analysis allowed the structure of the jet in the HIT ambient to be deduced, for which a two-region model was proposed. In the first region, following the developing region of the jet, the ambient turbulence progressively disrupts the jet structure and results in a faster concentration decay compared to the quiescent ambient. At a critical downstream distance, where the relative turbulence intensity between the ambient and the jet (ξ = urms,HIT/ urms,jet ) exceeds 0.5, the HIT ambient has destroyed the jet structure and the second region starts. In the second region, the turbulent diffusion is the only mechanism to transport the passive scalar field. The first-order centroidal statistics of the scalar field show self-similarity and self-preservation before jet break-up. The width of the jet is larger in the HIT ambient compared to that in a quiescent ambient and grows with axial distance but remains unchanged beyond jet break-up. Using the present passive scalar data and the velocity data from Khorsandi et al. 2013, it is argued that the momentum-driven entrainment of the jet in the HIT ambient is reduced compared to that in a quiescent ambient, and that the entrainment ceases beyond the jet break-up. The entrainment of the smaller scales of the ambient turbulence leads to a wider range of centerline concentrations and rms concentrations within the jet, and they are hypothesized to increase local concentration gradients and reduce the jet mixing.Diffusion of a patch of a passive scalar in the HIT ambient is studied. A high-Sc number passive scalar dye (Sc = 2500) is released isokinetically from a large diameter jet (d = 29.97 mm), and an orthogonal view of the passive scalar field is obtained using planar laser-induced fluorescence. The temporal evolution of the scalar patch is due to molecular diffusion and to turbulent diffusion in a quiescent ambient and in the HIT ambient, respectively. Time-averaged statistics of the passive scalar field are assessed at t = 0.2, 1, 1.8, 2.6, 3.4 s using a centroidal analysis. The mean concentration decays quickly and the rms concentration increases within the scalar patch. Compared to the quiescent ambient case, a wider range of the concentrations is present at the centroid of the scalar field. The size of the scalar patch increases with time, which is attributed to an increasing turbulent diffusivity for times shorter than the integral time scale of the turbulence"--
Nonlinear Spatial Wave Development In An Axisymmetrical Turbulent Jet
DOWNLOAD
Author : Y. Y. Chan
language : en
Publisher: 1975.
Release Date : 1975
Nonlinear Spatial Wave Development In An Axisymmetrical Turbulent Jet written by Y. Y. Chan and has been published by 1975. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
This report gives the detailed analysis of the nonlinear development of a spatial-growth wave disturbance in the turbulent shear layer of a circular jet. The method of analysis is based on the global consideration of the energy transfer between the mean flow, the turbulence and the wave fluctuation in the shear layer. For the correlation functions required for the integral formulation, those of the mean and the turbulent flows of the jet are calculated numerically by a finite difference method, and those of the wave fluctuations are obtained from a linear stability theory of a divergent flow. The predicted development of the wave is in good agreement with the experimental data.