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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Wartime Reports
 Collection: Technical Report Archive and Image Library
Heat-transfer coefficients for air flowing in round tubes, in rectangular ducts, and around finned cylinders

Heat-transfer coefficients for air flowing in round tubes, in rectangular ducts, and around finned cylinders

Date: February 1, 1945
Creator: Drexel, Rober E & Mcadams, William H
Description: Report reviews published data and presents some new data on heat transfer to air flowing in round tubes, in rectangular ducts, and around finned cylinders. The available data for heat transfer to air in straight ducts of rectangular and circular cross section have been correlated in plots of Stanton number versus Reynolds number to provide a background for the study of the data for finned cylinders. Equations are recommended for both the streamlined and turbulent regions, and data are presented for the transition region between turbulent and laminar flow. Use of hexagonal ends on round tubes causes the characteristics of laminar flow to extend to high Reynolds numbers. Average coefficients for the entire finned cylinder have been calculated from the average temperature at the base of the fins and an equation which was derived to allow for the effectiveness of the fins. The available results for each finned cylinder are correlated herein in terms of graphs of Stanton number versus Reynolds number. In general, for a given Reynolds number, the Stanton number increases with increases in both spacing and width of the fins, and is apparently independent of cylinder diameter and temperature difference. For a given coefficient of heat transfer ...
Contributing Partner: UNT Libraries Government Documents Department
Investigation of flow in an axially symmetrical heated jet of air

Investigation of flow in an axially symmetrical heated jet of air

Date: December 1, 1943
Creator: Corrsin, Stanley
Description: The work done under this contract falls essentially into two parts: the first part was the design and construction of the equipment and the running of preliminary tests on the 3-inch jet, carried out by Mr. Carl Thiele in 1940; the second part consisting in the measurement in the 1-inch jet flow in an axially symmetrical heated jet of air. (author).
Contributing Partner: UNT Libraries Government Documents Department
Torsion tests of stiffened circular cylinders

Torsion tests of stiffened circular cylinders

Date: May 1, 1944
Creator: Moore, R L & Wescoat, C
Description: The design of curved sheet panels to resist shear involves a consideration of several factors: the buckling resistance of the sheet, the stress at which buckling becomes permanent, and the strength which may be developed beyond the buckling limit by tension-field action. Although some experimental as well as theoretical work has been done on the buckling and tension-field phases of this problem, neither of these types of action appears to be very well understood. The problem is of sufficient importance from the standpoint of aircraft design, it is believed, to warrant further experimental investigation. This report presents the results of the first series of torsion tests of stiffened circular cylinders to be completed in connection with this study at Aluminum Research Laboratories. (author).
Contributing Partner: UNT Libraries Government Documents Department
Design charts for cross-flow tubular intercoolers charge-across-tube type

Design charts for cross-flow tubular intercoolers charge-across-tube type

Date: January 1, 1941
Creator: Valerino, Michael F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Design charts for cross-flow tubular intercoolers charge-through-tube type

Design charts for cross-flow tubular intercoolers charge-through-tube type

Date: July 1, 1941
Creator: Valerino, Michael F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Calculations of intake-air cooling resulting from water injection and of water recovery from exhaust gas

Calculations of intake-air cooling resulting from water injection and of water recovery from exhaust gas

Date: August 1, 1944
Creator: Rotherock, Addison M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of fuel volatility on performance of a Wright R-2600-8 engine as influenced by mixture distribution

Effect of fuel volatility on performance of a Wright R-2600-8 engine as influenced by mixture distribution

Date: September 1, 1944
Creator: Engelman, Helmuth W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Economy of internally cooling only the overheated cylinders of aircraft engines

Economy of internally cooling only the overheated cylinders of aircraft engines

Date: July 1, 1945
Creator: Henneberry, Hugh M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Characteristics of the BMW 801D2 automatic engine control as determined from bench tests

Characteristics of the BMW 801D2 automatic engine control as determined from bench tests

Date: April 1, 1945
Creator: Addie, A N
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of high-resistance ignition cable on the erosion of spark-plug electrodes

The effect of high-resistance ignition cable on the erosion of spark-plug electrodes

Date: September 1, 1945
Creator: Rodgers, Franklin A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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