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Experimental Studies On Boundary Layer Transition On A Reentry Vehicle Of Transonic And Supersonic Speeds
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Book Synopsis Experimental Studies on Boundary-layer Transition on a Reentry Vehicle of Transonic and Supersonic Speeds by : Kojiro Suzuki
Download or read book Experimental Studies on Boundary-layer Transition on a Reentry Vehicle of Transonic and Supersonic Speeds written by Kojiro Suzuki and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The boundary-layer transition on the EXPRESS reentry capsule at transonic and supersonic speeds is studied experimentally by the wind tunnel tests. For the diagnostic of the turbulent transition of the boundary-layer, the China-clay method is used. The experimental results clarify that when the freestream Mach number increases, the transition point moves downstream on the body surface and the distance between the beginning of the transition and its completion to the fully turbulent flow becomes larger. The effects of the freestream Mach number on the location of the boundary-layer transition are described successfully in terms of two non-dimensional quantities, that is, the transition Reynolds number and the local Mach number at the boundary-layer edge. The oil-flow pictures reveal that in the transonic regime, the separation bubble is formed at the junction between the blunt nose and the conical part of the body and therefore the transition begins behind the reattachment point of the separation bubble. The effects of the turbulent transition on the aerodynamic characteristics of the reentry body are investigated by using the technique of the boundary-layer trip and the experimental results show that the aerodynamic characteristics of the EXPRESS reentry vehicle are not sensitive to the boundary-layer transition.
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 An Experimental Study of Boundary-layer Transition at Supersonic and Hypersonic Speeds by : Jack D. Whitfield
Download or read book An Experimental Study of Boundary-layer Transition at Supersonic and Hypersonic Speeds written by Jack D. Whitfield and published by . This book was released on 1960 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Boundary Layer Transition at Supersonic Speeds by : E. R. Van Driest
Download or read book Boundary Layer Transition at Supersonic Speeds written by E. R. Van Driest and published by . This book was released on 1961 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments carried out in the 12-inch supersonic wind tunnel to investigate the effect of three dimensional roughness elements (spheres) on boundary-layer transition on a 10-degree (apex angle) cone without heat transfer are described. The local Mach number for these tests was 2.71. The data show clearly that the minimum (effective) size of trip required to bring transition to its lowest Reynolds number varies power of the distance from the apex of the cone to the trip. Use of available data at other Mach numbers indicates that the Mach number influence for effective tripping is taken into account by a simple expression. Some remarks concerning the roughness variation for transition on a blunt body are made. Finally, a general criterion is introduced which gives insight to the transition phenomenon and anticipates effects of external and internal disturbances, Mach number transfer.
Book Synopsis Boundary-layer Transition Study of Several Pointed Bodies of Revolution at Supersonic Speeds by : William A. Cassels
Download or read book Boundary-layer Transition Study of Several Pointed Bodies of Revolution at Supersonic Speeds written by William A. Cassels and published by . This book was released on 1970 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boundary-layer transition by the sublimation and impact-pressure techniques and force tests have been performed on three Haack-Adams bodies of revolution of fineness ratios 7, 10, and 13 at zero angle of attack for free-stream Mach numbers of 2.00, 2.75, and 4.63 and a range of Reynolds numbers based on model length of 6 to 15 X 10(to the 6 power) with and without a roughness strip. The grit method of inducing turbulence was found to provide for a nearly complete turbulent flow over the models at the lower Mach numbers and higher Reynolds numbers considered in this study while the amount of trip drag was less than 8 percent of the model drag with transition fixed. A method of interpreting sublimation data was discussed and used and the results compared well with the impact-pressure results.
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:
Book Synopsis Research and Technology Program Digest Flash Index by :
Download or read book Research and Technology Program Digest Flash Index written by and published by . This book was released on 1967 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Technology Program Digest by : United States. National Aeronautics and Space Administration
Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 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 1997 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Experiments at High Supersonic Speeds on the Aerodynamic and Boundary-layer Transition Characteristics of High-drag Bodies of Revolution by : Alvin Seiff
Download or read book Some Experiments at High Supersonic Speeds on the Aerodynamic and Boundary-layer Transition Characteristics of High-drag Bodies of Revolution written by Alvin Seiff and published by . This book was released on 1957 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transient Cooling of an Enclosed Fluid Through Its Maximum-density Temperature by : Ho Sang Kwak
Download or read book Transient Cooling of an Enclosed Fluid Through Its Maximum-density Temperature written by Ho Sang Kwak and published by . This book was released on 1997 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transient cool-down process of a fluid from an initial high temperature to a target temperature in a closed container is investigated numerically. The fluid has a quadratic density-temperature relationship, and the maximum density occurring at Tm. Cooling is accomplished by abruptly lowing the sidewall temperature, and the mean temperature passes through Tm in the course of cool-down. A finite-volume method is employed to acquire numerical solutions to the full, time-dependent two-dimensional Navier-Stokes equations. In order to simulate the realistic situations under micro gravity, the Rayleigh number, Ra, encompasses the range 10 to the 5th less than or equal to Ra less than or equal to 10 to the 8th. The effects of the density inversion on the cool-down are illuminated. Based on the structures of the sidewall boundary layer, three characteristic flow regimes are identified at early time the qualitative early-time behavior is determined by the density inversion factor. Evolutions of the global fields of flow and temperature of each flow regime are described. The analysis of time-dependent heat transfer characteristics reveals that the cool-down process is divided into several definite transient phases. The relevant time scales for the overall cool-down process are estimated. The specific effects of the Rayleigh number, density inversion factor, and the aspect ratio of the container on each evolutionary stage are elaborated.
Book Synopsis Tōkyō Daigaku Kōgakubu Kōgaku Kenkyuka Kiyō by :
Download or read book Tōkyō Daigaku Kōgakubu Kōgaku Kenkyuka Kiyō written by and published by . This book was released on 1995 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)
Book Synopsis Experimental Studies of Hypersonic Boundary Layer Transition by : J. E. Lagraff
Download or read book Experimental Studies of Hypersonic Boundary Layer Transition written by J. E. Lagraff and published by . This book was released on 1970 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) by :
Download or read book Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) written by and published by . This book was released on 1995 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Affecting Transition at Supersonic Speeds by : K. R. Czarnecki
Download or read book Factors Affecting Transition at Supersonic Speeds written by K. R. Czarnecki and published by . This book was released on 1953 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper surveys the available material and summarizes what is known to date about boundary-layer transition at supersonic speeds. Variables studied include Mach number, Reynolds number, pressure gradients, heat transfer, surface roughness, and angle of attack. The discussion is limited to bodies of revolution because similar reliable data for wings is lacking.
