Download or read book Some Sphere Drag Measurements in Low Density Shock Tunnel Flows written by R. E. Geiger and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The free flight technique was extended to low density flows to measure sphere drag at approximately Mach 15 over a free stream Knudsen number range of .0027 to .25. Comparison of the data obtained with those of other investigators indcates that : a) The free flight technique is useful for shock tunnel measurements of aerodynamic forces in non-continuum flows. b) There is little to choose from between Kn[subscript infinity], Re[subscript infinity], Re2 as a correlating variable for experimental sphere drag coefficients. (c) The parameter C [subscript D] - C [subscript Di] over C [subscript Dfm] - C [subscriptDi] yields a useful correlatin of sphere drag over a wide range of Mach numbers, Reynolds number and wall temperatures.
Download or read book Some Sphere Drag Measurements in Low Density Shock Tunnel Flows written by R. E. Geiger and published by . This book was released on 1963 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The free flight technique was extended to low density flows to measure sphere drag at approximately Mach 15 over a free stream Knudsen number range of .0027 to .25. Comparison of the data obtained with those of other investigators indcates that : a) The free flight technique is useful for shock tunnel measurements of aerodynamic forces in non-continuum flows. b) There is little to choose from between Kn[subscript infinity], Re[subscript infinity], Re2 as a correlating variable for experimental sphere drag coefficients. (c) The parameter C [subscript D] - C [subscript Di] over C [subscript Dfm] - C [subscriptDi] yields a useful correlatin of sphere drag over a wide range of Mach numbers, Reynolds number and wall temperatures.
Download or read book Sphere Drag in a Low Density Supersonic Flow written by Jerome Aroesty and published by . This book was released on 1962 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sphere drag coefficients were measured in the Berkeley Low Density Wind Tunnel at Mach equals 2, 4, and 6, and free stream Reynolds numbers between 10 and 10,000 for both insulated and cold wall conditions. The measurements indicate that sphere drag in this regime is strongly dependent on the Reynolds number behind a normal shock wave, and only weakly dependent on Mach number. In addition, it was found that a decrease in wall temperature/stagnation temperature (T sub w/T sub o) from 1 to 0.26 was accompanied by a 5 - 10% decrease in the drag coefficient. A precision microbalance was used to obtain data for insulated spheres, and a moving model technique was used to obtain data for small spheres falling freely through a wind tunnel jet. These latter tests were performed using both cold and insulated models. The results on insulated spheres at M equal 2 and 4 were in good agreement with the measurements of other investigators. The results of the cold wall tests indicate that for Mach numbers greater than 5 in air, sphere drag coefficients are a function only of T sub w/T sub o and the post normal shock Reynolds number. (Author).
Download or read book The measurement of sphere drag in a rarefied gas using a magnetic wind tunnel balance written by W. M. Phillips and published by . This book was released on 1970 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Drag Forces in Low Density Flows written by J. J. Smolderen and published by . This book was released on 1968 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new technique to accurately measure low level forces and its application to the determination of drag coefficients in rarefied hypersonic flow are described. Preliminary results are presented for cylinders and spheres at M = 8 in the transitional and near-free-molecule flow regimes. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Measurements of the Drag on Spheres in a Low Density Low Supersonic Flow written by Lelan Ray Jamison and published by . This book was released on 1964 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Density Supersonic Sphere Drag with Variable Wall Temperature written by D. L. Whitfield and published by . This book was released on 1971 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Force measurements were made to investigate the effect of wall temperature on sphere drag in low-density supersonic flow. Drag data were obtained by fixing flow conditions and changing only the sphere wall temperature. A means of correlating drag data in transition flow is suggested, and its validity is assessed by applying the correlation parameter to this and several other sets of experimental data. (Author).
Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 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 1973 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1983 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1969-03 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurements of Sphere Drag from Hypersonic Continuum to Free molecule Flow written by David J. Masson and published by . This book was released on 1960 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1970 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sphere Drag in Low Density Gas Flow written by Winfred Marshall Phillips and published by . This book was released on 1966 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
