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Exploratory engine test of transpiration-cooled turbine-rotor blade with wire-cloth shell

Description: Engine tests were made on a transpiration-cooled blade that was fabricated from an internal load-carrying member with an external surface of wire cloth. After operation in the engine, some damage was noted at the tip region of the trailing edge of the blades. On other sections of the blade, the wire cloth did not appear greatly overheated, and it appeared that satisfactory chordwise temperature distribution was provided by orifices in the blade base.
Date: January 20, 1954
Creator: Donoughe, Patrick L. & Diaguila, Anthony J.
Partner: UNT Libraries Government Documents Department

Permeability variation of a taper-rolled wire cloth

Description: Report presenting the cloth permeability of rolling a tapering thickness on a 20x200-mesh stainless-steel wire clothing investigated experimentally. The application of the cloth was for the shell of a transpiration-cooled turbine blade operating at gas and shell temperatures of 2500 and 10000 degrees Fahrenheit. Results regarding the taper-rolled cloth and comparison of taper-and flat-rolled samples are provided.
Date: February 13, 1957
Creator: Diaguila, Anthony J. & Liebert, Curt H.
Partner: UNT Libraries Government Documents Department

Experiments on mixed-free-and-forced-convective heat transfer connected with turbulent flow through a short tube

Description: Report presenting experiments conducted to obtain information on heat transfer in turbulent, mixed-free- and -forced-convection flow. The investigation revealed that the total flow regime as characterized by its Reynolds and Grashof numbers can be subdivided into a forced-flow regime, a free-flow regime, and a mixed-free- and -force-convection regime.
Date: July 1953
Creator: Eckert, E. R. G.; Diaguila, Anthony J. & Curren, Arthur N.
Partner: UNT Libraries Government Documents Department

Rapid determination of core dimensions of crossflow gas-to-gas heat exchangers

Description: Report presenting a generalized procedure that permits a rapid determination of the core lengths of crossflow gas-to-gas heat exchangers. Some of the variables that must be prescribed include the inlet states of each fluid, the available pressure drops for each fluid, the required temperature change of one fluid, the fluid heat capacities, and the core configuration.
Date: December 1956
Creator: Diaguila, Anthony J. & Livingood, John N. B.
Partner: UNT Libraries Government Documents Department

Study of ram-air heat exchangers for reducing turbine cooling-air temperature of a supersonic aircraft turbojet engine

Description: The sizes and weights of the cores of heat exchangers were determined analytically for possible application for reducing turbine cooling-air temperatures of an engine designed for a Mach number of 2.5 and an altitude The sizes and weights of the cores of heat exchangers were determined analytically for possible application for reducing turbine cooling-air temperatures of an engine designed for a Mach number of 2.5 and an altitude of 70,000 feet. A compressor-bleed-air weight flow of 2.7 pounds per second was assumed for the coolant; ram air was considered as the other fluid. Pressure drops and inlet states of both fluids were prescribed, and ranges of compressor-bleed-air temperature reductions and of the ratio of compressor-bleed to ram-air weight flows were considered.
Date: August 3, 1956
Creator: Diaguila, Anthony J.; Livingood, John N. B. & Eckert, Ernst R. G.
Partner: UNT Libraries Government Documents Department

Free-convection effects on heat transfer for turbulent flow through a vertical tube

Description: Report presenting experimental heat-transfer data for the turbulent flow of fluids through stationary vertical tubes with both small and large length-to-diameter ratios compared for the case where the acceleration of gravity is opposite in direction to the mean velocity in the tube and where the heat flows from the tube wall into the fluid.
Date: December 1955
Creator: Eckert, E. R. G.; Diaguila, Anthony J. & Livingood, John N. B.
Partner: UNT Libraries Government Documents Department

Experiments on turbulent flow through channels having porous rough surfaces with or without air injection

Description: Report examining the use of transpiration cooling as a method to cool different structural elements such as turbine blades or the walls of combustion chambers in jet engines and parts of the skin of missiles. In some of the applications, the surface roughness inherently connected with a porous material may exceed the limit for which a surface is considered as hydraulically smooth.
Date: February 1955
Creator: Eckert, E. R. G.; Diaguila, Anthony J. & Donoughe, Patrick L.
Partner: UNT Libraries Government Documents Department

Method of calculating core dimensions of crossflow heat exchanger with prescribed gas flows and inlet and exit states

Description: Report presenting a calculation procedure by which the dimensions of the core of a gas-to-gas crossflow heat exchanger with prescribed heat-transfer surface can be determined rapidly. The procedure is based on a number of charts that may be prepared for each surface with prescribed entrance conditions, pressure drops, and temperature changes.
Date: April 1956
Creator: Eckert, E. R. G. & Diaguila, Anthony J.
Partner: UNT Libraries Government Documents Department