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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Surge-inception study in a two-spool turbojet engine

Surge-inception study in a two-spool turbojet engine

Date: January 1, 1956
Creator: Lubick, R. J.; Saari, M. J. & Wallner, L. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Surge-Inception Study in a Two-Spool Turbojet Engine, Revised

Surge-Inception Study in a Two-Spool Turbojet Engine, Revised

Date: November 7, 1957
Creator: Wallner, Lewis E.; Lubick, Robert J. & Saari, Martin J.
Description: A two-spool turbojet engine was operated in the Lewis altitude wind tunnel to study the inception of compressor surge. In addition to the usual steady-state pressure and temperature measurements, the compressors were extensively instrumented with fast-response interstage pressure transducers. Thus it was possible to obtain maps for both compressors, pressure oscillations during rotating stall, effects of stall on efficiency, and stage-loading curves. In addition, with the transient measurements, it was possible to record interstage pressures and then compute stage performance during accelerations to the stall limit. Rotating stall was found to exist at low speeds in the outer spool. Although the stall arose from poor flow conditions at the inlet-stage blade tips, the low-energy air moved through the machine from the tip at the inlet to the outer spool to the hub at the inlet to the inner spool. This tip stall ultimately resulted in compressor surge in the mid-speed region, and necessitated inter-compressor air bleed. Interstage pressure measurements during acceleration to the compressor stall limit indicated that rotating stall was not a necessary condition for compressor surge and that, at the critical stall point, the circumferential interstage pressure distribution was uniform. The exit-stage group of the inner spool was ...
Contributing Partner: UNT Libraries Government Documents Department
A survey and evaluation of flutter research and engineering

A survey and evaluation of flutter research and engineering

Date: October 5, 1956
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Survey and Status Report on Application of Acoustic-Boiling-Detection Techniques to Liquid-Metal-Cooled Reactors

Survey and Status Report on Application of Acoustic-Boiling-Detection Techniques to Liquid-Metal-Cooled Reactors

Date: April 1970
Creator: Anderson, T. T.; Mulcahey, T. P. & Hsu, C.
Description: Report issued by the Argonne National Laboratory discussing acoustic-boiling-detection techniques. As stated in the abstract, "this report summarizes literature through June 1967 concerning acoustic methods. In the acoustic method for boiling detection, either acoustic waveguides or high-temperature acoustic sensors are recommended" (p. 1). This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Survey of adhesives and adhesion

Survey of adhesives and adhesion

Date: August 1, 1945
Creator: Rinker, R C & Kline, G M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Survey of available information on internal flow losses through axial turbomachines

Survey of available information on internal flow losses through axial turbomachines

Date: January 26, 1951
Creator: Wu, Chung-Hua
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A survey of background and aircraft noise in communities near airports

A survey of background and aircraft noise in communities near airports

Date: December 1, 1954
Creator: Stevens, K N
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A survey of creep in metals

A survey of creep in metals

Date: November 1, 1951
Creator: SCHWOPE A D & Jackson, L R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Survey of Crude Oil in Storage, 1936-1937

Survey of Crude Oil in Storage, 1936-1937

Date: September 1938
Creator: United States. Bureau of Mines.
Description: Report issued by the U.S. Bureau of Mines over surveys conducted on the crude-oil inventory in the United States. Sampling methods, and survey results are presented. Tables and graphs are included in this report.
Contributing Partner: UNT Libraries Government Documents Department
Survey of Dust-Control Practices in the Coal-Mining Industry

Survey of Dust-Control Practices in the Coal-Mining Industry

Date: April 1956
Creator: Barnes, R. W.; Gregory, M. J.; Owings, C. W. & Berger, L. B.
Description: Report issued by the U.S. Bureau of Mines discussing dust-control of coal mining operations. As stated in the summary, "this circular presents results of a survey conducted by the Bureau of Mines to ascertain the extent to which dust-control practices are employed in the coal-mining industry" (p. 1). This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department