Download or read book Diffuser Efficiency and Flow Process of Supersonic Wind Tunnels with Free Jet Test Section written by Rudolf Hermann and published by . This book was released on 1950 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the wind tunnel arrangement under consideration, the air leaves the Laval nozzle as a free jet and is recaptured by the diffuser, which is of the convergent-divergent design. A theoretical analysis of the flow process through this type of supersonic wind tunnel is presented and the diffuser efficiency is calculated for the case of equilibrium between test chamber pressure and pressure in the nozzle exit, assuming one-dimensional, in viscous, steady flow. Using the basic equations of continuity, energy and momentum flux through a bounding surface, an exact solution of the problem is obtained, which is applicable up to Mach number infinite. One of the basic results is, that in the recapturing zone of the diffuser a transition occurs from supersonic to subsonic flow, which is followed by an acceleration in the convergent portion up to sonic velocity at the second throat. The transition is not a normal shock and involves a total pressure loss greater than that of a normal shock at the test section Mach number. A mathematical solution with supersonic velocity after the transition process has no physical existence. A comprehensive comparison of the analytical results with available experiments in supersonic wind tunnels up to Mach number 4.4 regarding diffuser efficiency and second throat area shows good agreement.
Download or read book Investigations on Diffuser Efficiency in Supersonic Wind Tunnels written by Klaus Oswatitsch and published by . This book was released on 1948 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phenomena in Supersonic Diffusers written by Heinrich Ramm and published by . This book was released on 1947 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffuser Efficiency of Free Jet Supersonic Wind Tunnels at Variable Test Chamber Pressure written by Rudolf Hermann and published by . This book was released on 1952 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High speed Wind Tunnels written by Luigi Crocco and published by . This book was released on 1946 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance assumed in recent times by experimental supersonic wind tunnels, as well as the power required, has brought about the need for a study which would permit a comparison of the types tested and the principal theoretical plans.
Download or read book Low density Hypervelocity Wind Tunnel Diffuser Performance written by Mancil W. Milligan and published by . This book was released on 1963 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supersonic Inlet Diffusers and Introduction to Internal Aerodynamics written by Rudolf Hermann and published by . This book was released on 1956 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supersonic Wind Tunnel Diffuser Studies written by Warren H. Curry and published by . This book was released on 1952 with total page 160 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 1960 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation of Supersonic Wind Tunnel Performance with Solid Wall Test Section Supersonic Diffuser Scavenging Scoop Combinations written by R. V. DeLeo and published by . This book was released on 1956 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental evaluation of wind tunnel performance has been conducted for the University of Minnesota by the Rosemount Aeronautical Laboratories within a test section Mach number range of 1.5 to 4.4. In order to evaluate the effect of the addition of various scavenge ducts to the basic wind tunnel configuration, the performance of a solid wall test section - adjustable diffuser combination was determined both with and without a scavenging duct present.
Download or read book The Use of Perforated Inlets for Efficient Supersonic Diffusion written by John C. Evvard and published by . This book was released on 1951 with total page 40 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 1960 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Open jet Wind Tunnel Investigation of a Fixed geometry Diffuser System at Mach Numbers 3 6 and 7 0 written by Richard F. Austin and published by . This book was released on 1966 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fixed-geometry second-throat diffuser system was tested in an open-jet wind tunnel at Mach numbers 3.6 and 7.0. These tests were conducted at Reynolds numbers of 1,000,000 and 200,000, based on expansion nozzle exit diameter. The investigation was conducted to provide diffuser design criteria for the AEDC proposed Hypersonic True Temperature Tunnel (Tripltee). At M infinity = 3.6, empty test section diffuser efficiencies of 96% of normal shock recovery were achieved. Under similar conditions at M infinity = 7.0, efficiencies of 90% were obtained, thus establishing that reasonable diffuser efficiencies can be obtained at both Mach numbers with a single diffuser system. Tunnel operation was possible with conical models of up to 18-% blockage, but diffuser efficiency was reduced by 8 to 12%. Tunnel flow could not be established with models in the test section. Models of 8- to 10-% blockage would not permit establishment of tunnel flow at either M infinity = 3.6 or 7.0. It was necessary to inject the models into the flow after the tunnel was started. Limited diffuser heating rate data was obtained at M infinity = 7.0. (Author).
Download or read book The High speed Flexible throat Supersonic Wind Tunnel written by and published by . This book was released on 1948 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Aeronautical Sciences written by and published by . This book was released on 1953 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Data Digest written by and published by . This book was released on 1952 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Confidential Documents written by United States. Army Air Forces and published by . This book was released on 1952 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
