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A Study Of Dean Vortex Development And Structure In A Curved Rectangular Channel With Aspect Ratio Of 40 At Dean Numbers Up To 430
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Book Synopsis A Study of Dean Vortex Development and Structure in a Curved Rectangular Channel with Aspect Ratio of 40 at Dean Numbers Up to 430 by : Phillip M. Ligrani
Download or read book A Study of Dean Vortex Development and Structure in a Curved Rectangular Channel with Aspect Ratio of 40 at Dean Numbers Up to 430 written by Phillip M. Ligrani and published by . This book was released on 1994 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Dean Vortex Development and Structure in a Curved Rectangular Channel with Aspect Ratio of 40 at Dean Numbers Up to 430 by : Philip M. Ligrani
Download or read book A Study of Dean Vortex Development and Structure in a Curved Rectangular Channel with Aspect Ratio of 40 at Dean Numbers Up to 430 written by Philip M. Ligrani and published by . This book was released on 1994 with total page 288 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 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis The Development and Structural Characteristics of Dean Vortices in a Curved Rectangular Channel by : Lawrence Richard Baun
Download or read book The Development and Structural Characteristics of Dean Vortices in a Curved Rectangular Channel written by Lawrence Richard Baun and published by . This book was released on 1988 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development and structure of Dean vortices in a curved channel were measured and studied. A 40:1 aspect ratio channel with mild curvature was employed. Circulation of mean streamwise vorticity, and maxima of streamwise, spanwise and radial components of vorticity increase as the Dean number increases from 40 to 140. Mean vorticity components were determined from measurements of the three components of mean velocity using a miniature five hole pressure probe. Spectra obtained from a subminiature crossed wire probe show principal and harmonic frequencies for Dean numbers greater than 165, when vortices are twisting. Spectral peaks at other Dean numbers provide evidence of oscillations also observed during flow visualization. Keywords: Dean vortices, Dean number, Channel flow, Rectangular curved channel, Theses. (JHD).
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of the Effects of Centrifugal Instabilities on Flow in a 40 to 1 Aspect Ratio Rectangular Curved Channel, for Dean Numbers from 35 to Fully Turbulent Conditions by : William A. Fields
Download or read book Study of the Effects of Centrifugal Instabilities on Flow in a 40 to 1 Aspect Ratio Rectangular Curved Channel, for Dean Numbers from 35 to Fully Turbulent Conditions written by William A. Fields and published by . This book was released on 1990 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development and structure of Dean vortices in a high aspect ratio curved channel were measured and studied for Dean numbers from 35 to fully turbulent conditions. Mean vorticity components were determined from measurements of the three components of mean velocity, which were measured using a miniature five-hole pressure probe. Streamwise, radial and spanwise vorticity components measured 120 deg from the start of curvature, show evidence of Dean vortices in the time-averaged flow field. Peak streamwise and peak spanwise vorticity, as well as streamwise circulation, generally increase as the Dean number increases from 60 to 240. Peak radial vorticity increases as Dean numbers vary from 60 to about 160. Spectra obtained from hot-wire probes show evidence of different frequency events, including twisting and undulation. Twisting is apparent for Dean numbers of 135 to 160 while undulation is observed at lower Dean numbers. Flow visualization results illustrate a variety of time dependent events in the channel.
Book Synopsis Flow Visualization of Time-Varying Structural Characteristics of Dean Vortices in a Curved Channel by : David Wayne Bella
Download or read book Flow Visualization of Time-Varying Structural Characteristics of Dean Vortices in a Curved Channel written by David Wayne Bella and published by . This book was released on 1988 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The time varying development and structure of Dean vortices were studied using flow visualization. Observations were made over a range of Dean numbers from 40 to 200 using a transparent channel with mild curvature, 40:1 aspect ratio, and an inner to outer radius ratio of 0.979. Seven flow visualization techniques were tried but only one, a wood burning smoke generator, produced usable results. Different vortex characteristics were observed and documented in sequences of photographs spaced one quarter of a second apart at locations ranging from 85 to 135 degrees from the start of curvature. Evidence is presented that supports the twisting/rocking nature of the flow. keywords: Curved heat transfer; Centrifugal instabilities. (KR).
Book Synopsis Structural Characteristics of Dean Vortices in a Curved Channel by : Randal D. Niver
Download or read book Structural Characteristics of Dean Vortices in a Curved Channel written by Randal D. Niver and published by . This book was released on 1987 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dean vortices in a curved channel were studied using flow visualization and a miniature Kiel probe to record total pressure. The channel is 1.27 cm. high by 50.8 cm. wide (0.5 in. x 20.0 in.), aspect ratio of 40 to 1, with a radius of curvature of 60.96 cm. (24.0 in) for the concave surface. Mean velocities within the curve channel were maintained at Dean numbers which ranged from 0 to 250. Smoke injected into the mouth of the channel at Dean numbers from 42 to 218 and locations from 65 deg to 145 deg revealed different types of flow behavior, including numerous pairs of Dean vortices extending from the convex to the concave wall. Different types off flow structures have been categorized as to unsteadiness, height, and symmetry. For each category a map has been constructed which depicts the flow structure observed as a function of Dean number and angular location. These maps and the photographs give an understanding of the flow behavior in the curved channel over a significant range of experimental conditions. Total pressure measurements at a Dean number of 110 and one location (118 deg) were taken. The preliminary results are presented on a contour plot which shows some repeatability across a 2 in. portion of the channel span. These contour plot results are consistent with photographs for the same experimental conditions. (Author).
Book Synopsis Study of the Transition to Turbulence Within a Curved Rectangular Channel with 40 to 1 Aspect Ratio by : Steven Jay Fuqua
Download or read book Study of the Transition to Turbulence Within a Curved Rectangular Channel with 40 to 1 Aspect Ratio written by Steven Jay Fuqua and published by . This book was released on 1991 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 616 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 1989 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vienna Revolution, 1848 written by and published by . This book was released on 1848 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Study of Taylor-Goertler Vortices in a Curved Rectangular Channel by : Robert Joe McKee
Download or read book An Experimental Study of Taylor-Goertler Vortices in a Curved Rectangular Channel written by Robert Joe McKee and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rectangular cross section channel, with both a straight and a curved portion, was designed and built to create the laminar secondary Taylor-Goertler vortex flow. An aerosol was used to visualize these flow patterns, and photographs of the results are presented. A hot wire anemometer investigation of one location in the curved section was conducted to obtain the mean velocity profiles and turbulence levels. The pressure drop along both the straight and the curved sections was measured and compared. A constant temperature wall heater was also designed and installed in the straight section of the channel. Approximate values of the heating losses were obtained and the overall and local heat transfer coefficients were calculated for the straight portion of the channel. It was concluded that the vortices develop with both velocity increases and distance along the channel, and that the increase in pressure drop due to the vortices varied from near zero to approximately 20% with increasing Reynolds numbers. (Author).
Book Synopsis Heat Transfer and Fluid Flow in Minichannels and Microchannels by : Satish Kandlikar
Download or read book Heat Transfer and Fluid Flow in Minichannels and Microchannels written by Satish Kandlikar and published by Elsevier. This book was released on 2006 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: &Quot;This book explores flow through passages with hydraulic diameters from about 1 [mu]m to 3 mm, covering the range of minichannels and microchannels. Design equations along with solved examples and practice problems are also included to serve the needs of practicing engineers and students in a graduate course."--BOOK JACKET.
Book Synopsis Standard Methods for the Examination of Water and Wastewater by : American Public Health Association
Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bench Scale Calorimetry in Chemical Reaction Kinetics by : Wilfried Litz
Download or read book Bench Scale Calorimetry in Chemical Reaction Kinetics written by Wilfried Litz and published by Springer. This book was released on 2015-07-03 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes new and efficient calorimetric measurement methods, which can be used to accurately follow the chemical kinetics of liquid phase reaction systems. It describes apparatus and techniques for the precise measuring of the rate of heat liberation in discontinuous and continuous isothermal as well as non-isothermal reactions. The presented methodology can be used to follow the development of chemical reactions online, even in industrial scales. Written by an experienced scientist and practitioner, who can look back on long-standing expert knowledge in chemical engineering, the book contains many practical hints and instructions. The reader will find a sound compact introduction to fundamentals, and comprehensive technical background information and instructions for performing own kinetic experiments. This book is the fusion of scientific background information and long hands-on experience in the practice.
