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Further Experiments On Impact Pressure Probes In A Low Density Hypervelocity Flow
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Book Synopsis Further Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow by : A. B. Bailey
Download or read book Further Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow written by A. B. Bailey and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the behavior of flat-faced, impact-pressure probes with a range of orificeto-probe diameter ratios was made in heated A under conditions where free stream Mach. = 4 to 14, gas temperature = 2700 to 4300 K, and Reynolds number (based on outside probe diameter and conditions behind a normal shock)/in. = 30 to 430. At the lower Reynolds numbers the measured impact pressure was found to decrease with the pressure sensing orifice size. This result agrees with that found in heated N. As the Reynolds number increased this orifice effect became less significant, and at the higher Reynolds numbers no decrease in measured impact pressure was noted for the smallest orifice tested. This tends to confirm the assumption made in some experiments on impact-pressure probes in a low-density hypervelocity flow (AD-268 391) that this behavior is caused by a thermomolecular flow effect. Because this effect is a function solely of pressure at a particular temperature, the greater the pressure the smaller the effect. When Re2 times the square root of density in free stream over density in normal shock is less than 800 in A the measured impact pressure was less than the true impact pressure and decreased to a minimum value, approximately 93% of the true value. As the Reynolds number decreased still further, the viscous effects became dominant, and there was a sharp increase in the measured impact pressure. (Author).s
Book Synopsis Some Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow by : A. B. Bailey
Download or read book Some Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow written by A. B. Bailey and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the behavior of flat-faced, impact- pressure probes with a range of orifice-to-probe diameter ratios was made in heated nitrogen, where Mach number was 9.3, stagnation temperature was 3000 K, and the unit Reynolds number was 260/in. It was found, contrary to experience in low-density, unheated flows, that the impact pressure decreased with a reduction in orifice diameter for a fixed probe outer diameter in these tests. A discussion of the factors which could cause this decrease is contained herein. An analysis of the data indicates that in order to obtain as accurate a value of impact pressure as possible in low-density, hypervelocity flows, attention must be given to a number of factors, including viscous effects, thermal gradient effects, probe shape, thermal or chemical nonequilibrium, and non-continuum fluid phenomena.
Book Synopsis Some Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow by : A. B. Bailey
Download or read book Some Experiments on Impact-pressure Probes in a Low-density, Hypervelocity Flow written by A. B. Bailey and published by . This book was released on 1961 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the behavior of flat-faced, impact- pressure probes with a range of orifice-to-probe diameter ratios was made in heated nitrogen, where Mach number was 9.3, stagnation temperature was 3000 K, and the unit Reynolds number was 260/in. It was found, contrary to experience in low-density, unheated flows, that the impact pressure decreased with a reduction in orifice diameter for a fixed probe outer diameter in these tests. A discussion of the factors which could cause this decrease is contained herein. An analysis of the data indicates that in order to obtain as accurate a value of impact pressure as possible in low-density, hypervelocity flows, attention must be given to a number of factors, including viscous effects, thermal gradient effects, probe shape, thermal or chemical nonequilibrium, and non-continuum fluid phenomena.
Book Synopsis An Analysis of Initial Static Pressure Probe Measurements in a Low-density Hypervelocity Wind Tunnel by : David E. Boylan
Download or read book An Analysis of Initial Static Pressure Probe Measurements in a Low-density Hypervelocity Wind Tunnel written by David E. Boylan and published by . This book was released on 1963 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: An initial experimental program was previously conducted to study the problems in using static pressure probes for flow calibration purposes in low- density, hypervelocity wind tunnels with continuous flow. This data is reviewed in the light of more recent data on thermal transpiration. Results indicate that such probes may be used for what might be termed secondary calibrations, but care is required in interpreting the results. The present experiment yielded data which are compared to static pressures calculated from impact- pressure probe calibrations.
Download or read book NASA Technical Note written by and published by . This book was released on 1967 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Keywords Index to U.S. Government Technical Reports by :
Download or read book Keywords Index to U.S. Government Technical Reports written by and published by . This book was released on 1962 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1963 with total page 146 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 456 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 Practical Application of Automation in a Scientific Information Center, a Case Study by : C. K. Bauer
Download or read book Practical Application of Automation in a Scientific Information Center, a Case Study written by C. K. Bauer and published by . This book was released on 1963 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rarefied Gas Dynamics; Proceedings by :
Download or read book Rarefied Gas Dynamics; Proceedings written by and published by . This book was released on 1964 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Department of Commerce. Office of Technical Services Publisher : ISBN 13 : Total Pages :618 pages Book Rating :4.3/5 (91 download)
Book Synopsis Keywords Index to U.S. Government Technical Reports (permuted Title Index). by : United States. Department of Commerce. Office of Technical Services
Download or read book Keywords Index to U.S. Government Technical Reports (permuted Title Index). written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1963 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Shock Shape and Shock Detachment Distance for Spheres and Flat-faced Bodies in Low-density, Hypervelocity, Argon Flow by : A. B. Bailey
Download or read book The Shock Shape and Shock Detachment Distance for Spheres and Flat-faced Bodies in Low-density, Hypervelocity, Argon Flow written by A. B. Bailey and published by . This book was released on 1963 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was made to determine the pressure distribution, shock shape, and shock detachment distance for spheres and the latter two characteristics for flatfaced bodies in a heated argon flow. The modified Newtonian approximation for the pressure distribution, which is strictly an empirical relationship, gives good results when applied to the first 60 degrees of a hemisphere under conditions where the body boundary layer and the shock layer merge. The natural flow visualization produced as a result of the high total temperature and consequent excitation of the argon enabled this study to be made. Photographs taken of the shocks generated by a series of spheres and flat-faced bodies were analyzed with a photo-densitometer to determine the shock shape and shock detachment distance. The blast analogy predicts a difference in the shape of shocks in argon and air at high Mach numbers and Reynolds numbers. An empirical relationship proposed by Love was used to calculate the shock shape in air for Mach numbers corresponding to those of the present investigation. (Author).
Book Synopsis Rarefied Gas Dynamics by : Alfred E. Beylich
Download or read book Rarefied Gas Dynamics written by Alfred E. Beylich and published by . This book was released on 1991 with total page 1638 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the most recent international research in the field of rarefied gas dynamics (RGD). Unique in the depth and scope of its presentation, it considers progress made in the treatment of non-equilibrium phenomena in such fields as aerospace, vacuum technology, isotope separation and gas dynamic lasers. Due to the broad range of RGD applications, the volume will appeal to readers from numerous fields (e.g. physics, engineering, mathematics, chemistry).
Book Synopsis Rarefied Gas Dynamics by : J. H. De Leeuw
Download or read book Rarefied Gas Dynamics written by J. H. De Leeuw and published by . This book was released on 1965 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Paper written by and published by . This book was released on 1983 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Society of Automotive Engineers [preprints]. by :
Download or read book Society of Automotive Engineers [preprints]. written by and published by . This book was released on 1963 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Readings in Information Retrieval by : Harold S. Sharp
Download or read book Readings in Information Retrieval written by Harold S. Sharp and published by . This book was released on 1964 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Society of Automotive Engineers [preprints]. PDF Online Free](https://books.google.com/books/content/images/frontcover/yfeNvou0wMkC?fife=w200-h370)
