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Pressure Recovery and Related Properties in Supersonic Diffusers: A Review

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Publisher :

Page : 47 pages

File Size : 47,50 MB

Release : 1974

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Book Description

This report covers a literature survey on the status of present knowledge on supersonic diffusers. Three types of diffusers are examined: wind tunnel diffusers, ramjet inlets, and supersonic ejectors. No systematic study on wind tunnel diffusers has been found. The results obtained in specific studies, made in conjunction with the design and installation of a number of wind tunnels, show that 100% of normal shock recovery is obtained for M less than 10. Some systematic work exists for ramjet diffusers, with most of the attention being paid to external compression configurations. For supersonic ejectors, comprehensive studies have been made, and useful empirical design methods are available.





Preliminary Investigation of Supersonic Diffusers

Author : Arthur Kantrowitz

Publisher :

Page : 38 pages

File Size : 27,14 MB

Release : 1945

Category : Aerodynamics, Supersonic

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Summary: The deceleration of air from supersonic velocities in channels has been studied. It has become apparent that a normal shock in the diverging part of the diffuser is probably necessary for stable flow, and ways of minimizing the intensity of this shock have been developed. The effect of various geometrical parameters, especially contraction ratio in the entrance region, on the performance of supersonic diffusers has been investigated. By the use of these results, diffusers were designed which, starting without initial boundary layer, recovered 90 percent of the kinetic energy in supersonic air streams up to a Mach number of 1.85.