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 Collection: Technical Report Archive and Image Library
Results 15391 - 15414 of 19,794
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An investigation of lamellar structures and minor phases in eleven cobalt-base alloys before and after heat treatment

An investigation of lamellar structures and minor phases in eleven cobalt-base alloys before and after heat treatment

Date: March 1, 1954
Creator: Weeton, J W & Signorelli, R A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of off-design performance of shock-in-rotor type supersonic blading

Investigation of off-design performance of shock-in-rotor type supersonic blading

Date: May 7, 1951
Creator: Graham, Robert C; Klapproth, John F & Barina, Frank J
Description: An analysis of the off-design performance of shock-in rotor-type supersonic blading is presented. The over-all losses are assumed divided into two groups;normal-shock losses, and external-wave losses. Throughout the range of relative entrance Mach numbers from 1.35 to starting, the largest losses can be attributed to the normal shock. An improvement in performance would be expected with a reduction of the normal-shock losses by the introduction of external compression waves.
Contributing Partner: UNT Libraries Government Documents Department
Laminar boundary layer behind shock advancing into stationary fluid

Laminar boundary layer behind shock advancing into stationary fluid

Date: March 1, 1955
Creator: Mirels, Harold
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Laminar boundary layer on cone in supersonic flow at large angle of attack

Laminar boundary layer on cone in supersonic flow at large angle of attack

Date: November 1, 1952
Creator: Moore, Franklin K
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Longitudinal turbulent spectrum survey of boundary layers in adverse pressure gradients

Longitudinal turbulent spectrum survey of boundary layers in adverse pressure gradients

Date: May 1, 1955
Creator: Sandborn, Virgil A & Slogar, Raymond J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Load-Range Performance of Turbine-Propeller Engine in Transonic Speed Range and Comparison with Load-Range Performance of Turbojet Engine

Load-Range Performance of Turbine-Propeller Engine in Transonic Speed Range and Comparison with Load-Range Performance of Turbojet Engine

Date: January 6, 1951
Creator: Lubarsky, Bernard
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An Investigation of Convergent-Divergent Diffusers at Mach Number 1.85

An Investigation of Convergent-Divergent Diffusers at Mach Number 1.85

Date: April 28, 1947
Creator: Wyatt, Demarquis D & Hunczak, Henry R
Description: An investigation has been conducted in the Cleveland 18- by 18-inch supersonic tunnel at a Mach number of 1.85 and angles of attack from 0 deg to 5 deg to determine optimum design configurations for a convergent-divergent type of supersonic diffuser with a subsonic diffuser of 5 deg included divergence angle. Total pressure recoveries in excess of theoretical recovery across a normal shock at a free-stream Mach number of 1.85 wore obtained with several configurations. The highest recovery for configurations without a cylindrical throat section was obtained with an inlet having an included convergence angle of 20 deg. Insertion of a 2-inch throat section between a 10 deg included angle inlet and the subsonic diffuser stabilized the shock inside the diffuser and resulted in recoveries as high as 0.838 free-stream total pressure at an angle of attack of 0 deg, corresponding to recovery of 92.4 percent of the kinetic energy of the free air stream. Use of the throat section also lessened the reduction in recovery of all configurations due to angle of attack.
Contributing Partner: UNT Libraries Government Documents Department
An investigation of convergent-divergent diffusers at Mach number 1.85

An investigation of convergent-divergent diffusers at Mach number 1.85

Date: February 2, 1951
Creator: Wyatt, Demarquis D & Hunczak, Henry R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of dynamic characteristics of a turbine-propeller engine

Investigation of dynamic characteristics of a turbine-propeller engine

Date: September 5, 1951
Creator: Oppenheimer, Frank L & Jacques, James R
Description: Time constants that characterize engine speed response of a turbine-propeller engine over the cruising speed range for various values of constant fuel flow and constant blade angle were obtained both from steady-state characteristics and from transient operation. Magnitude of speed response to changes in fuel flow and blade angle was investigated and is presented in the form of gain factors. Results indicate that at any given value of speed in the engine cruising speed range, time constants obtained both from steady-state characteristics and from transient operation agree satisfactorily for any given constant fuel flow, whereas time constants obtained from transient operation exceed time constants obtained from steady-state characteristics by approximately 14 percent for any given blade angle.
Contributing Partner: UNT Libraries Government Documents Department
Laminar natural-convection flow and heat transfer of fluids with and without heat sources in channels with constant wall temperatures

Laminar natural-convection flow and heat transfer of fluids with and without heat sources in channels with constant wall temperatures

Date: December 1, 1952
Creator: Ostrach, Simon
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Laminar free convection on a vertical plate with prescribed nonuniform wall heat flux or prescribed nonuniform wall temperature

Laminar free convection on a vertical plate with prescribed nonuniform wall heat flux or prescribed nonuniform wall temperature

Date: July 1, 1955
Creator: Sparrow, E M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Lift hysteresis at stall as an unsteady boundary-layer phenomenon

Lift hysteresis at stall as an unsteady boundary-layer phenomenon

Date: November 1, 1955
Creator: Moore, Franklin K
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Limits of flammability of pure hydrocarbon-air mixtures at reduced pressures and room temperature

Limits of flammability of pure hydrocarbon-air mixtures at reduced pressures and room temperature

Date: May 25, 1951
Creator: Dipiazza, James T
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Lift and moment equations for oscillating airfoils in an infinite unstaggered cascade

Lift and moment equations for oscillating airfoils in an infinite unstaggered cascade

Date: October 1, 1954
Creator: Mendelson, Alexander & Carroll, Robert W
Description: Aerodynamic coefficients similar to those of the isolated airfoil are obtained as functions of the cascade geometry and the phasing between successive blades; the phasings considered are zero, 90 degrees, and 180 degrees. These aerodynamic coefficients are plotted for the special case when all the airfoils are vibrating in bending in phase (360 degree phasing). It is shown that the effect of cascading for this case is to reduce greatly the aerodynamic damping. (author).
Contributing Partner: UNT Libraries Government Documents Department
A linear time-temperature relation for extrapolation of creep and stress-rupture data

A linear time-temperature relation for extrapolation of creep and stress-rupture data

Date: March 1, 1953
Creator: Manson, S S & Haferd, A M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Heat loss from yawed hot wires at subsonic Mach numbers

Heat loss from yawed hot wires at subsonic Mach numbers

Date: September 1, 1955
Creator: Sandborn, Virgil A & Laurence, James C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of effects of several fuel-injection locations on operational performance of a 20-inch ram jet

Investigation of effects of several fuel-injection locations on operational performance of a 20-inch ram jet

Date: June 8, 1948
Creator: Sterbentz, W H; Perchonok, E & Wilcox, F A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of far noise field of jets II : comparison of air jets and jet engines

Investigation of far noise field of jets II : comparison of air jets and jet engines

Date: January 1, 1956
Creator: Coles, Willard, D & Callaghan, Edmund E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of far noise field of jets I : effect of nozzle shape

Investigation of far noise field of jets I : effect of nozzle shape

Date: January 1, 1956
Creator: Callaghan, Edmund E & Coles, Willard D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Low-temperature ignition-delay characteristics of several rocket fuels with mixed acid in modified open-cup-type apparatus

Low-temperature ignition-delay characteristics of several rocket fuels with mixed acid in modified open-cup-type apparatus

Date: October 17, 1950
Creator: Miller, Riley O
Description: Summaries of low-temperature self-ignition data of various rocket fuels with mixed acid (nitric plus sulfuric) are presented. Several fuels are shown to have shorter ignition-delay intervals and less variation in delay intervals at moderate and sub-zero temperatures than crude N-ethylaniline (monoethylaniline),a rocket fuel in current use.
Contributing Partner: UNT Libraries Government Documents Department
Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Date: November 3, 1949
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration of turbine blades in a turbojet engine during operation

Vibration of turbine blades in a turbojet engine during operation

Date: April 22, 1948
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibrational modes of several hollow turbine blades and of solid turbine blade of similar aerodynamic design

Vibrational modes of several hollow turbine blades and of solid turbine blade of similar aerodynamic design

Date: October 3, 1949
Creator: Kemp, R H & Shifman, J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Visualization study of secondary flows in turbine rotor tip regions

Visualization study of secondary flows in turbine rotor tip regions

Date: September 1, 1955
Creator: Allen, Hubert W & Kofskey, Milton G
Description: None
Contributing Partner: UNT Libraries Government Documents Department