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Large Scale Structure And Mixing In A Sonic Transverse Jet Injected Into A Supersonic Crossflow
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Book Synopsis Large Scale Structure and Mixing in a Sonic Transverse Jet Injected Into a Supersonic Crossflow by : Wayne Maurice VanLerberghe
Download or read book Large Scale Structure and Mixing in a Sonic Transverse Jet Injected Into a Supersonic Crossflow written by Wayne Maurice VanLerberghe and published by . This book was released on 1995 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large scale structure and mixing characteristics of the flowfield surrounding a single, underexpanded, sonic, transverse jet injected into a Mach 1.6 crossflow were experimentally studied. The flowfield was investigated at three distinct sets of flow conditions corresponding to a jet-to-crossflow momentum flux ratio of 1.2, 1.7, and 2.2. Planar laser-induced fluorescence from acetone molecules and planar Mie scattering from condensed ethanol droplets were used to obtain spatially and temporally resolved flowfield visualizations in various side, end, and top view image planes. Statistical processing of the image ensembles produced mean and standard deviation images, two-dimensional spatial autocovariance fields representing the characteristics of the dominant turbulent structures, and probability density functions representing the instantaneous state of scalar mixing in the flowfield. Time-averaged descriptions of the mixing characteristics of this transverse jet flowfield were shown to be inaccurate. Intermittent large scale structures of various sizes, shapes, and orientations strongly influence the distribution of the jet fluid and the crossflow fluid. Relatively high probabilities of unmixed fluid (whether jet or crossflow) persist in many of the mixing regions between the jet and crossflow. The most significant instantaneous mixing in this flowfield seems to occur in the center of wake region slightly below the jet centerline. A counter-rotating streamwise vortex pair in the jet cross section plays an important role in the scalar mixing processes, as it transports jet fluid down towards the wake and entrains crossflow fluid from below up into the jet. The streamwise vortex pair initially develops in an asymmetric and undulating manner, but gradually becomes more symmetric farther downstream of the Mach disk. A relatively large portion of the total jet fluid bypasses the Mach disk through the upstream edge of the barrel shock, thereby retaining a significant fraction of its momentum. This relatively high momentum jet fluid penetrates deeply into the crossflow, contributes to the formation of the largest turbulent structures, and affects the evolution of the streamwise vortex pair.
Book Synopsis Circular and Elliptical Transverse Injection Into a Supersonic Crossflow by : M. R. Gruber
Download or read book Circular and Elliptical Transverse Injection Into a Supersonic Crossflow written by M. R. Gruber and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2008 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mixing Measurements of Transverse and Oblique Sonic Jets in Supersonic Cross Flow by : James E. Fay
Download or read book Mixing Measurements of Transverse and Oblique Sonic Jets in Supersonic Cross Flow written by James E. Fay and published by . This book was released on 2006 with total page 222 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 1979 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 25th AIAA Fluid Dynamics Conference by :
Download or read book 25th AIAA Fluid Dynamics Conference written by and published by . This book was released on 1994 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit by :
Download or read book 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit written by and published by . This book was released on 1997 with total page 622 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 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 34th Aerospace Sciences Meeting & Exhibit by :
Download or read book 34th Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-3700 - 05-3749 by :
Download or read book 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 10-13 July 2005, Tucson, Arizona: 05-3700 - 05-3749 written by and published by . This book was released on 2005 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Research Briefs ... by : Center for Turbulence Research (U.S.)
Download or read book Annual Research Briefs ... written by Center for Turbulence Research (U.S.) and published by . This book was released on 2007 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Study of the Velocity Field of a Transverse Jet Injected Into a Supersonic Crossflow by : Juan Gabriel Santiago
Download or read book An Experimental Study of the Velocity Field of a Transverse Jet Injected Into a Supersonic Crossflow written by Juan Gabriel Santiago and published by . This book was released on 1995 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of a supersonic combustor which uses transverse jet injection into a supersonic flow (TJISF) as a means of fuel injection and mixing requires a fundamental understanding of these flows. Such knowledge may also serve studies of the thrust vector control of rocket nozzles, the cooling of nozzle walls, and jet reaction force prediction. The present investigation is a quantitative, experimental study of a single, sonic, underexpanded, transverse jet injected into a Mach 1.6 crossflow. The motivation for this research program is to improve the fundamental understanding of the fluid dynamic mechanisms and mixing processes in this flow. Schlieren/shadowgraph photography, surface flow visualization, and two-component, frequency pre-shifted laser Doppler velocimetry (LDV) data have been obtained. Four LDV optical arrangements have been used to measure all three mean velocity components, five of the six kinematic Reynolds stresses, and the turbulent kinetic energy. The LDV system is equipped with a computer-controlled traverse system and has been used to provide velocity measurements at over 4,000 locations throughout the TJISF flowfield. The study focuses on the transverse, midline plane and two crossflow planes. The majority of the measurements in these planes has been made in the high gradient regions of the jet plume. Measurements of the mean and turbulent velocity fields helped resolve important issues in the study of the TJISF flowfield. These issues include the size and orientation of the recirculation regions upstream and downstream of the jet (including the horseshoe vortex just upstream of the jet); the structure and strength of the bow shock, barrel shock, and Mach disk; the structure, strength, and development of the kidney-shaped, counter-rotating vortex pair; the growth of the annular shear layer between the jet plume and the crossflow; the growth of the boundary layer beneath the jet plume; the Reynolds stress fields of the flow; the production of turbulent kinetic energy; and the degree of anisotropy of the turbulent stresses in this flow. In addition, the present study provides validation data for analytical and numerical predictions of the TJISF flowfield.
Book Synopsis Supersonic Crossflow Visualization Using the UCF Supersonic Wind Tunnel by : Peter Himmerich
Download or read book Supersonic Crossflow Visualization Using the UCF Supersonic Wind Tunnel written by Peter Himmerich and published by . This book was released on 2007 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: The next generation air breathing engine that would enable an alternative to conventional air travel or suborbital flight is the supersonic ramjet engine (SCRAM) which requires a highly accelerated rate of fuel mixing and combustion. For this type of engine, one of the improvement opportunities lies in the injection of the fuel into the supersonic flow inside the combustor. In order to determine the flow field that develops when a sonic jet of secondary gas is injected into a supersonic free stream, a dedicated test section was developed which was attached to the existing supersonic wind tunnel at the University of Central Florida. A Schlieren system was developed to visualize the associated flow fields and to provide a tool for future high-speed aerodynamic research. Mixing of a cross flow jet with a supersonic free stream is a topic of interest in the field of hypersonic air travel. In addition to a description and analysis of the resultant data, this thesis also serves as a reference for future research and work done with the UCF supersonic wind tunnel and the Schlieren system. The results agree with the literature, and the Schlieren images obtained show the associated shock and flow structures that are expected with a jet in cross flow.
Book Synopsis 43rd AIAA Aerospace Sciences Meeting & Exhibit by :
Download or read book 43rd AIAA Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 2005 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Large-scale Structure in a Supersonic Slot Injected Flow Field by : Robert L. Clark
Download or read book A Study of the Large-scale Structure in a Supersonic Slot Injected Flow Field written by Robert L. Clark and published by . This book was released on 1988 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure and Penetration of Transverse Fluid Jet Injected at Supercritical Pressure Into Supersonic Flow by : J. C. Hermanson
Download or read book Structure and Penetration of Transverse Fluid Jet Injected at Supercritical Pressure Into Supersonic Flow written by J. C. Hermanson and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Active Flow and Combustion Control 2014 by : Rudibert King
Download or read book Active Flow and Combustion Control 2014 written by Rudibert King and published by Springer. This book was released on 2014-09-13 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reports on the latest theoretical and experimental advances in the field of active flow and combustion control. It covers new developments in actuator technology and sensing, in robust and optimal open- and closed-loop control, as well as in model reduction for control. It collects contributions presented during the third edition of the Active Flow and Combustion Control conference, held in September 10-12, 2014 at the Technische Universität Berlin (Germany). This conference, as well as the research presented in the book, have been supported by the collaborative research center SFB 1029 -Substantial efficiency increase in gas turbines through direct use of coupled unsteady combustion and flow dynamics, funded by the DFG (German Research Foundation).
