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Assessment Of A Transitional Boundary Layer Theory At Low Hypersonic Mach Numbers
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Book Synopsis Assessment of a Transitional Boundary Layer Theory at Low Hypersonic Mach Numbers by : S. J. Shamroth
Download or read book Assessment of a Transitional Boundary Layer Theory at Low Hypersonic Mach Numbers written by S. J. Shamroth and published by . This book was released on 1972 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was carried out to assess the accuracy of a transitional boundary layer theory in the low hypersonic Mach number regime. The theory is based upon the simultaneous numerical solution of the boundary layer partial differential equations for the mean motion and an integral form of the turbulence kinetic energy equation which controls the magnitude and development of the Reynolds stress. Comparisions with experimental data show the theory is capable of accurately predicting heat transfer and velocity profiles through the transitional regime and correctly predicts the effects of Mach number and wall cooling on transition Reynolds number. The procedure shows promise of predicting the initiation of transition for given free stream disturbance levels. The effects on transition predictions of the pressure dilitation term and of direct absorption of acoustic energy by the boundary layer were evaluated.
Book Synopsis Comments on Hypersonic Boundary-layer Transition by : Kenneth F. Stetson
Download or read book Comments on Hypersonic Boundary-layer Transition written by Kenneth F. Stetson and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a survey paper on the subject of hypersonic boundary-layer transition. Part 1 discusses boundary-layer stability theory, hypersonic boundary-layer stability experiments, and a comparison between theory and experiment. Part 2 contains comments on how many configuration and flow parameters influence transition. Part 3 discusses some additional general aspects of transition. Part 4 discusses problems of predicting transition and comments on three prediction methods. Part 5 contains some general guidelines for prediction methodology. Keywords: Boundary layer transition, Boundary layer stability, Hypersonic boundary layers.
Book Synopsis Experimental Laminar, Transitional, and Turbulent Boundary-layer Profiles on a Wedge at Local Mach Number 6.5 and Comparisons with Theory by : Michael C. Fischer
Download or read book Experimental Laminar, Transitional, and Turbulent Boundary-layer Profiles on a Wedge at Local Mach Number 6.5 and Comparisons with Theory written by Michael C. Fischer and published by . This book was released on 1971 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind tunnel investigation of laminar, transitional, and turbulent boundary layer profiles on wedge at hypersonic speed to confirm theoretical analysis.
Book Synopsis Transition Fixing for Hypersonic Flow by :
Download or read book Transition Fixing for Hypersonic Flow written by and published by . This book was released on 1967 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Empirical Equation for Prediction of Transition Location on Cones in Super-or Hypersonic Flight by : Neal Tetervin
Download or read book An Empirical Equation for Prediction of Transition Location on Cones in Super-or Hypersonic Flight written by Neal Tetervin and published by . This book was released on 1973 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: An empirical equation has been developed for the prediction of transition location on blunt and sharp cones. The equation predicts the transition location fairly well for 48 ballistics range tests for cones without ablation and for 40 flight tests for cones with ablation ranging from zero to large. The equation is applicable for cones in supersonic or hypersonic flight. The experimental data cover a range of local Mach numbers at transition from 2.8 to 14.7 and a range of the ratio of local wall to local stream temperature at transition from .074 to 1.43.
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 Advances in Hypersonics by : BALLMAN
Download or read book Advances in Hypersonics written by BALLMAN and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: These three volumes entitled Advances in Hypersonics contain the Proceedings of the Second and Third Joint US/Europe Short Course in Hypersonics which took place in Colorado Springs and Aachen. The Second Course was organized at the US Air Force Academy, USA in January 1989 and the Third Course at Aachen, Germany in October 1990. The main idea of these Courses was to present to chemists, com puter scientists, engineers, experimentalists, mathematicians, and physicists state of the art lectures in scientific and technical dis ciplines including mathematical modeling, computational methods, and experimental measurements necessary to define the aerothermo dynamic environments for space vehicles such as the US Orbiter or the European Hermes flying at hypersonic speeds. The subjects can be grouped into the following areas: Phys ical environments, configuration requirements, propulsion systems (including airbreathing systems), experimental methods for external and internal flow, theoretical and numerical methods. Since hyper sonic flight requires highly integrated systems, the Short Courses not only aimed to give in-depth analysis of hypersonic research and technology but also tried to broaden the view of attendees to give them the ability to understand the complex problem of hypersonic flight. Most of the participants in the Short Courses prepared a docu ment based on their presentation for reproduction in the three vol umes. Some authors spent considerable time and energy going well beyond their oral presentation to provide a quality assessment of the state of the art in their area of expertise as of 1989 and 1991.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722499976 Total Pages :48 pages Book Rating :4.4/5 (999 download)
Book Synopsis Preliminary In-Flight Boundary Layer Transition Measurements on a 45 Deg Swept Wing at Mach Numbers Between 0. 9 And 1. 8 by : National Aeronautics and Space Administration (NASA)
Download or read book Preliminary In-Flight Boundary Layer Transition Measurements on a 45 Deg Swept Wing at Mach Numbers Between 0. 9 And 1. 8 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary flight experiment was flown to generate a full-scale supersonic data base to aid the assessment of computational codes, to improve instrumentation for measuring boundary layer transition at supersonic speeds, and to provide preliminary information for the definition of follow-on programs. The experiment was conducted using an F-15 aircraft modified with a small cleanup test section on the right wing. Results are presented for Mach (M) numbers from 0.9 to 1.8 at altitudes from 25,000 to 55,000 ft. At M greater than or = 1.2, transition occurred near or at the leading edge for the clean configuration. The furthest aft that transition was measured was 20 percent chord at M = 0.9 and M = 0.97. No change in transition location was observed after the addition of a notch-bump on the leading edge of the inboard side of the test section which was intended to minimize attachment line transition problems. Some flow visualization was attempted during the flight experiment with both subliming chemicals and liquid crystals. However, difficulties arose from the limited time the test aircraft was able to hold test conditions and the difficulty of positioning the photo chase aircraft during supersonic test points. Therefore, no supersonic transition results were obtained. Johnson, J. Blair Armstrong Flight Research Center RTOP 533-02-21...
Book Synopsis Effects of Mach Number, Leading Edge Bluntness and Sweep on Boundary-layer Transition on a Flat Plate by : Don W. Jillie
Download or read book Effects of Mach Number, Leading Edge Bluntness and Sweep on Boundary-layer Transition on a Flat Plate written by Don W. Jillie and published by . This book was released on 1961 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis PSE Analysis of Reacting Hypersonic Boundary Layer Transition by : Heath B. Johnson
Download or read book PSE Analysis of Reacting Hypersonic Boundary Layer Transition written by Heath B. Johnson and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Effects of Leading-edge Sweep on Boundary-layer Transition at Supersonic Speeds by : Gary T. Chapman
Download or read book Some Effects of Leading-edge Sweep on Boundary-layer Transition at Supersonic Speeds written by Gary T. Chapman and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DNS Studies of Transitional Hypersonic Reacting Flows Over 3-D Hypersonic Vehicles by : Xiaolin Zhong
Download or read book DNS Studies of Transitional Hypersonic Reacting Flows Over 3-D Hypersonic Vehicles written by Xiaolin Zhong and published by . This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability of Boundary Layers at High Supersonic and Hypersonic Speeds by : Thorwald Herbert
Download or read book Stability of Boundary Layers at High Supersonic and Hypersonic Speeds written by Thorwald Herbert and published by . This book was released on 1991 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Boundary-layer Transition Under Hypersonic Conditions by : J. Leith Potter
Download or read book Boundary-layer Transition Under Hypersonic Conditions written by J. Leith Potter and published by . This book was released on 1965 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Boundary Layer Transition on Outgassing Cones in Hypersonic Flow by :
Download or read book A Study of Boundary Layer Transition on Outgassing Cones in Hypersonic Flow written by and published by . This book was released on 1971 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Instability, Transition, and Turbulence by : M.Y. Hussaini
Download or read book Instability, Transition, and Turbulence written by M.Y. Hussaini and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the Workshop on In stability, Transition and Turbulence, sponsored by the Institute for Computer Applications in Science and Engineering (ICASE) and the NASA Langley Research Center (LaRC), during July 8 to August 2, 1991. This is the second workshop in the series on the subject. The first was held in 1989, and its proceedings were published by Springer-Verlag under the title "Instability and Transition" edited by M. Y. Hussaini and R. G. Voigt. The objectives of these work shops are to i) expose the academic community to current technologically im portant issues of transition and turbulence in shear flows over the entire speed range, ii) acquaint the academic community with the unique combination of theoretical, computational and experimental capabilities at LaRC and foster interaction with these capabilities, and iii) accelerate progress in elucidating the fundamental phenomena of transition and turbulence, leading to improved transition and turbulence modeling in design methodologies. The research areas covered in these proceedings include receptiv ity and roughness, nonlinear theories of transition, numerical simu lation of spatially evolving flows, modelling of transitional and fully turbulent flows as well as some experiments on instability and tran sition. In addition a one-day mini-symposium was held to discuss 1 recent and planned experiments on turbulent flow over a backward facing step.
Book Synopsis Boundary Layer Transition on a Generic Model of Control Flaps in Hypersonic Flow by : Madlen Leinemann
Download or read book Boundary Layer Transition on a Generic Model of Control Flaps in Hypersonic Flow written by Madlen Leinemann and published by . This book was released on 2022-06-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present thesis, experimental and numerical investigations were performed to study boundary layer transition on a generic model of a control surface in hypersonic flow at Mach 6. Experiments were carried out in the Hypersonic Ludwieg Tube at TU Braunschweig (HLB) and in the BAM6QT at Purdue University. In order to investigate the influence of the deflection angle, the Reynolds number and the leading edge radius, flow visualizations (Schlieren), pressure and heat transfer measurements were applied. In the BAM6QT at Purdue University, experiments were carried out under noisy and quiet flow conditions to allow investigations on the influence of the free stream conditions. It was found, that particularly the leading edge bluntness has a great impact on the recirculation region. For the investigated nose radii of rn = 30μm - 330μm, a strong increase of the separation bubble size was observed for increasing nose bluntness. Numerical investigations were performed based on RANS equations. For the HLB measurements, experimental data in combination with stability analysis revealed the presence of second mode instabilities on the cylinder section in the attached boundary layer. Within the flow separation, a shift in frequency was observed to a frequency range typical for first mode instabilities. Due to the lack of a numerical stability analysis for oblique waves the presence of first modes can not be proven. In the Purdue measurements, second modes could not be observed.
