Measurements of Sphere Drag from Hypersonic Continuum to Free-molecule Flow PDF Download
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Author: David J. Masson
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 38
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Author: David J. Masson
Publisher:
ISBN:
Category : Atmospheric density
Languages : en
Pages : 38
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Author: A. B. Bailey
Publisher:
ISBN:
Category :
Languages : en
Pages : 97
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A comprehensive set of measurements was made in a ballistic range which permits the sphere drag coefficient to be derived with an uncertainty of approximately +2 or -2 percent in the flight regime 0.1
Author: John F. Wendt
Publisher:
ISBN:
Category :
Languages : en
Pages : 43
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A modulated force probe with a sensitivity in the microgram range was employed to measure the drag forces on spheres in the Mach 5 range with an R.M.S. error of + or - 1%. Flow properties in the free jet were used to calculate sphere drag coefficients. The resulting values cover the flow regimes from near-free-molecule to transitional. A correlation parameter - an 'effective' Knudsen number based on body-free stream molecular collisions - is shown to provide a reasonable correlation for a large variety of sphere drag measurements.
Author: MAX. KINSLOW
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
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Drag of spheres was measured under hypersonic, cold-wall, support-free conditions in a nonreacting (vibration frozen) flow. Data were obtained for a nominal free-stream Mach 11 and for Reynolds numbers from 1 to 10 based on conditions immediately downstream of the bow shock and sphere diameter. These data were supplemented by measurements at a nominal Mach 10 where a conventional balance was used, and Reynolds numbers downstream of the shock as high as 10,000 were investigated in the cold-wall condition. The experimental results were analyzed both from the point of view of continuum flow with second-order viscous effects, and from the standpoint of a noncontinuum concept, taking account of first collisions between reemitted and free-stream molecules. Data from other sources were used to enlarge the present study and, in particular, to support the evaluation of K2 which represents the influences of vorticity, curvature, thick boundary layer, slip, and temperature jump. K2 was found to be negative in sign. The form of the derived equation for Cd/Cd(free molecular), where Cd is the drag coefficient, Cd/Cd free molecular appears to fit the experimental data over a considerable range of Knudsen numbers if a free constant is used in the expression for mean free path. (Author).
Author: Robert C. Blanchard
Publisher:
ISBN:
Category : Drag (Aerodynamics)
Languages : en
Pages : 64
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Author: G. A. Faucher
Publisher:
ISBN:
Category : Atmosphere, Upper
Languages : en
Pages : 44
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 686
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Author: Efstathios Michaelides
Publisher: CRC Press
ISBN: 1498701019
Category : Science
Languages : en
Pages : 1421
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Book Description
The Multiphase Flow Handbook, Second Edition is a thoroughly updated and reorganized revision of the late Clayton Crowe’s work, and provides a detailed look at the basic concepts and the wide range of applications in this important area of thermal/fluids engineering. Revised by the new editors, Efstathios E. (Stathis) Michaelides and John D. Schwarzkopf, the new Second Edition begins with two chapters covering fundamental concepts and methods that pertain to all the types and applications of multiphase flow. The remaining chapters cover the applications and engineering systems that are relevant to all the types of multiphase flow and heat transfer. The twenty-one chapters and several sections of the book include the basic science as well as the contemporary engineering and technological applications of multiphase flow in a comprehensive way that is easy to follow and be understood. The editors created a common set of nomenclature that is used throughout the book, allowing readers to easily compare fundamental theory with currently developing concepts and applications. With contributed chapters from sixty-two leading experts around the world, the Multiphase Flow Handbook, Second Edition is an essential reference for all researchers, academics and engineers working with complex thermal and fluid systems.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 86
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