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Heat Transfer Through Turbulent Friction Layers

Description: The "general Prandtl number" Pr(exp 1) - A(sub q)/A Pr, aside from the Reynolds number determines the ratio of turbulent to molecular heat transfer, and the temperature distribution in turbulent friction layers. A(sub q) = exchange coefficient for heat; A = exchange coefficient for momentum transfer. A formula is derived from the equation defining the general Prandtl number which describes the temperature as a function of the velocity. For fully developed thermal boundary layers all questions relating to heat transfer to and from incompressible fluids can be treated in a simple manner if the ratio of the turbulent shear stress to the total stress T(sub t)/T in the layers near the wall is known, and if the A(sub q)/A can be regarded as independent of the distance from the wall. The velocity distribution across a flat smooth channel and deep into the laminar sublayer was measured for isothermal flow to establish the shear stress ratio T(sub t)/T and to extend the universal wall friction law. The values of T(sub t)/T which resulted from these measurements can be approximately represented by a linear function of the velocity in the laminar-turbulent transition zone. The effect of the temperature relationship of the material values on the flow near the wall is briefly analyzed. It was found that the velocity at the laminar boundary (in contrast to the thickness of the laminar layer) is approximately independent of the temperature distribution. The temperature gradient at the wall and the distribution of temperature and heat flow in the turbulent friction layers were calculated on the basis of the data under two equations. The derived formulas and the figures reveal the effects of the Prandtl number, the Reynolds number, the exchange quantities and the temperature relationship of the material values.
Date: September 1, 1943
Creator: Reichardt, H.

Magnolia Oil Field, Columbia County, Arkansas: Part 1. Petroleum-Engineering Study; Part 2. Derivation and Application of Material-Balance Equations

Description: Report issued by the U.S. Bureau of Mines on studies conducted at the Magnolia oil fields in Columbia County, Arkansas. History, geology, and methods are presented. This report includes tables, graphs, maps, and illustrations.
Date: September 1943
Creator: Carpenter, Charles B.; Schroeder, H. J. & Cook, Alton B.

NACA Investigation of a Jet-Propulsion System Applicable to Flight

Description: Following a brief history of the NACA investigation of jet propulsion, a discussion is given of the general investigation and analysis leading to the construction of the jet-propulsion ground-test mock-up. The results of burning experiments and of test measurements designed to allow quantitative flight performance predictions of the system are presented and correlated with calculations. These calculations are then used to determine the performance of the system on the ground and in the air at various speeds and altitudes under various burning conditions. The application of the system to an experimental airplane is described and some performance predictions for this airplane are made.
Date: September 17, 1943
Creator: Ellis, Macon C. & Brown, Clinton E.

Newsmap. Monday, September 6, 1943 : week of August 26 to September 2, 208th week of the war, 90th week of U.S. participation

Description: Front: Text describes action on various war fronts: Germany, Russia, Italy, Denmark, Sweden, New Georgia, New Guinea, Marcus Island. Maps show air offensive in western Europe, New Georgia Is., Russian front. Includes photographs: Army Air Forces report on Warnemunde; Tough customer [Gourmiers, Berber fighting men]; The first wave [Yanks at Rendova I.]. Back: Typical German infantry division. Illustration of a division with descriptive text keyed to the illustration. Regiments described including size, officers and enlisted men, types and numbers of weapons.
Date: September 6, 1943
Creator: [United States.] Army Orientation Course

Newsmap. Monday, September 13, 1943 : week of September 2 to September 9, 209th week of the war, 91st week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Yugoslavia, Air offensive, Southwest Pacific, Russia. Maps show military activities in Eurasia and New Guinea near Salamaua with boxed text highlighting action. Photograph: A story of blood [American soldier receives a transfusion while lying on the street in Santa Agata, Sicily while townspeople look on]. Back: Something money can't buy - United States Army tradition! Illustration shows service ribbons of service medals. Text describes the purpose and conditions of award of service medals.
Date: September 13, 1943
Creator: [United States.] Army Orientation Course

Newsmap. Monday, September 20, 1943 : week of September 9 to September 16, 210th week of the war, 92nd week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Italian fleet, Mussolini, Russia, Rhodes, New Guinea, Paramushiro. Inset maps of Eastern Europe from France to Turkey and of Papua, Northeast New Guinea and New Britain. Includes photographs and captions "released by the Nazis and received in the United States through neutral Portugal and Sweden." Back: Battleground in Italy. Map of Italy with inset map of the countries surrounding Italy.
Date: September 20, 1943
Creator: [United States.] Army Orientation Course

Newsmap. Monday, September 27, 1943 : week of September 16 to September 23, 211th week of the war, 93rd week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Sardinia and Corsica, Russia, Southwest pacific, Dodecanese Is., Gilbert Is., Yugoslavia. Maps show Russian front; European fronts; Jap-controlled territory in Southwest Pacific. Inset map shows battle line of Russian front on July 5th. Includes 7 photographs of war action. Back: Progress of the War : Report from the Chief of Staff to the Secretary of War : 1 July 1941 to 30 June 1943. Extensive text with 2 maps: Deployment of American troops; Time and space chart: air and water logistics.
Date: September 27, 1943
Creator: [United States.] Army Orientation Course

Periodic Heat Transfer at Small Pressure Fluctuations

Description: The effect of cyclic gas pressure variations on the periodic heat transfer at a flat wall is theoretically analyzed and the differential equation describing the process and its solution for relatively. Small pressure fluctuations developed, thus explaining the periodic heat cycle between gas and wall surface. The processes for pure harmonic pressure and temperature oscillations, respectively, in the gas space are described by means of a constant heat transfer coefficient and the equally constant phase angle between the appearance of the maximum values of the pressure and heat flow most conveniently expressed mathematically in the form of a complex heat transfer coefficient. Any cyclic pressure oscillations, can be reduced by Fourier analysis to harmonic oscillations, which result in specific, mutual relationships of heat-transfer coefficients and phase angles for the different harmonics.
Date: September 1, 1943
Creator: Pfriem, H.

Physiological aspects of flying.

Description: "The purpose of this manual is to endeavor to explain in everyday terms the various physical and physiological problems that arise during flying, and to give in detail the latest knowledge of proved solutions to these problems." (--Page 2.)
Date: September 25, 1943
Creator: United States. War Department.