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Criterions for condensation-free flow in supersonic tunnels

Description: Report presenting the results of an investigation of water-vapor condensation shocks in the air passing through supersonic tunnels. Criterions for condensation-free flow are established by correlating experimental observations with the Volmer theory of nuclei formation. Results regarding the condensation-free criterions, scale effect, physical appearance of condensation shock, and practical considerations for tunnel design are provided.
Date: December 1951
Creator: Burgess, Warren C., Jr. & Seashore, Ferris L.
Partner: UNT Libraries Government Documents Department

Effects of shock-boundary-layer interaction on the performance of a long and a short subsonic annular diffuser

Description: Report presenting an investigation to determine the effects on performance of positioning normal shocks in or upstream of both a long and a short subsonic annular diffuser. Results regarding the entrance flow conditions, performance for subsonic-entrance flows, and performance with choked- and supersonic-entrance flows are provided.
Date: April 15, 1958
Creator: Wood, Charles C. & Henry, John R.
Partner: UNT Libraries Government Documents Department

Absorbing landing shocks

Description: Report discussing tires, steel springs, hydraulic shock absorbers, and axle travel are all examined in relation to absorbing landing shocks.
Date: August 1923
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Investigations of Compression Shocks and Boundary Layers in Gases Moving at High Speed

Description: The mutual influences of compression shocks and friction boundary layers were investigated by means of high speed wind tunnels.Schlieren optics provided a clear picture of the flow phenomena and were used for determining the location of the compression shocks, measurement of shock angles, and also for Mach angles. Pressure measurement and humidity measurements were also taken into consideration.Results along with a mathematical model are described.
Date: January 1947
Creator: Ackeret, J.; Feldmann, F. & Rott, N.
Partner: UNT Libraries Government Documents Department

Earthquakes in California in 1890 and 1891

Description: A paper which records all of the shocks observed or felt on Mount Hamilton, and all of those reported to the Lick Observatory by letter; as well as newspaper reports of such earthquakes as occurred in the state during that year.
Date: 1892
Creator: Holden, Edward Singleton
Partner: UNT Libraries Government Documents Department

United States Earthquakes, 1928

Description: Report discussing earthquake activity in the United States during 1928. The report is broken down by regions and has sections for specific earthquakes.
Date: 1930
Creator: Heck, N. H. & Bodle, R. R.
Partner: UNT Libraries Government Documents Department