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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Some observations of shock-induced turbulent separation on supersonic diffusers

Some observations of shock-induced turbulent separation on supersonic diffusers

Date: May 4, 1954
Creator: Nussdorfer, Theodore J
Description: A survey of experimental data at supersonic speed indicated that shock-induced separation of a turbulent boundary layer will result for Mach numbers of approximately 1.33 or greater when a theoretical stream static-pressure-rise ratio of approximately 1.89 occurs across a shock interacting with the boundary layer. The significance of this tentative criterion for turbulent boundary-layer separation is discussed with respect to the design of supersonic diffusers.
Contributing Partner: UNT Libraries Government Documents Department
Some observations on maximum pressure rise across shocks without boundary-layer separation on airfoils at transonic speeds

Some observations on maximum pressure rise across shocks without boundary-layer separation on airfoils at transonic speeds

Date: November 1, 1956
Creator: Lindsey, Walter F & Johnston, Patrick J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some observations on stall flutter and buffeting

Some observations on stall flutter and buffeting

Date: June 25, 1953
Creator: Rainey, A Gerald
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some observations on stress-corrosion cracking of single crystals of AZ61X magnesium alloy

Some observations on stress-corrosion cracking of single crystals of AZ61X magnesium alloy

Date: July 1, 1957
Creator: Meller, F & Metzger, M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some observations on the relationship between fatigue and internal friction

Some observations on the relationship between fatigue and internal friction

Date: September 1, 1956
Creator: Valluri, S R
Description: Results are presented of an investigation made to determine the internal friction and fatigue strength of commercially pure 1100 aluminum under repeated stressing in torsion at various temperatures and stress levels in an effort to find if there exists any correlation between internal friction and fatigue characteristics.
Contributing Partner: UNT Libraries Government Documents Department
Some observations relating to recovery of internal friction during fatigue of aluminum

Some observations relating to recovery of internal friction during fatigue of aluminum

Date: September 1, 1958
Creator: Valluri, S R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some operating experience and problems encountered during operation of a free-jet facility

Some operating experience and problems encountered during operation of a free-jet facility

Date: February 13, 1957
Creator: Mcaulay, John E & Prince, William R
Description: During a free-jet investigation of a 28-inch ram-jet engine at a Mach number of 2.35, flow pulsation at the engine inlet were discovered which proved to have an effect on the engine performance and operational characteristics, particularly the engine rich blowout limits. This report discusses the finding of the flow pulsations, their elimination, and effect. Other facility characteristics, such as the establishment of flow simulation and the degree of subcritical operation of the diffuser, are also explained.
Contributing Partner: UNT Libraries Government Documents Department
Some possibilities of using gas mixtures other than air in aerodynamic research

Some possibilities of using gas mixtures other than air in aerodynamic research

Date: January 1, 1956
Creator: Chapman, Dean R
Description: A study is made of the advantages that can be realized in compressible-flow research by employing a substitute heavy gas in place of air. The present report is based on the idea that by properly mixing a heavy monatomic gas with a suitable heavy polyatomic gas, it is possible to obtain a heavy gas mixture which has the correct ratio of specific heats and which is nontoxic, nonflammable, thermally stable, chemically inert, and comprised of commercially available components. Calculations were made of wind-tunnel characteristics for 63 gas pairs comprising 21 different polyatomic gases properly mixed with each of three monatomic gases (argon, krypton, and zenon).
Contributing Partner: UNT Libraries Government Documents Department
Some preliminary results in the determination of aerodynamic derivatives of control surfaces in the transonic speed range by means of a flush-type electrical pressure cell

Some preliminary results in the determination of aerodynamic derivatives of control surfaces in the transonic speed range by means of a flush-type electrical pressure cell

Date: October 8, 1948
Creator: Erickson, Albert L & Robinson, Robert C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some pressure-distribution measurements on a swept-wing at transonic speeds by the NACA wing-flow method

Some pressure-distribution measurements on a swept-wing at transonic speeds by the NACA wing-flow method

Date: June 6, 1947
Creator: Johnston, J Ford & Danforth, Edward C B
Description: None
Contributing Partner: UNT Libraries Government Documents Department