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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
Venturi Tube with Varying Mass Flow

Venturi Tube with Varying Mass Flow

Date: March 1, 1948
Creator: Regenscheit, B.
Description: Measurements on three tubes with flow regulated by suction at the trainling edge of the tube are described. It was possible to vary the mass of air flowing through the tube over a large range. Such tubes could be used for shrouded propellers.
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
Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Date: November 1, 1944
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Date: January 31, 1949
Creator: Meyer, Andre J , Jr & Calvert, Howard F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration Survey of Blades in 19XB Axial-Flow Compressor, 2, Dynamic Investigation

Vibration Survey of Blades in 19XB Axial-Flow Compressor, 2, Dynamic Investigation

Date: April 9, 1947
Creator: Meyer, Andre J., Jr. & Calvert, Howard F.
Description: Strain-gage measurements were taken under operating conditions from blades of various stages of the 19XB axial-flow compressor in an effort to determine the reason for failures in the seventh and tenth stages. First bending-mode vibrations were detected in the first five stages of the compressor caused by each integral multiple of rotor speed from three through ten. Lead-wire failures in the last five stages resulted in incomplete data. The dynamic-vibration frequencies at various rotor speeds were compared with statically measured frequencies analytically corrected for the influence of centrifugal force. Large increases in vibration ani~litude with increased pressure ratio were observed. During surging operation, blade vibrations were not present. The effects of pressure ratio and surge indicate the existence of aerodynamic excitation as the cause of the blade vibrations.
Contributing Partner: UNT Libraries Government Documents Department
Vibration Survey of Blades in 19XB Axial-Flow Compressor, 3, Preliminary Engine Investigation

Vibration Survey of Blades in 19XB Axial-Flow Compressor, 3, Preliminary Engine Investigation

Date: January 28, 1948
Creator: Meyer, Andre J., Jr. & Calvert, Howard F.
Description: Strain gages were used to measure blade vibrations possibly causing failure in the 10-stage compressor of the 19XB jet-propulsion engine. The seventh and tenth stages were of great concern as a result of failures experienced by the manufacturer. Strain-gage records were obtained from all stages during acceleration, deceleration, and constant speed runs. Curves are presented herein showing the maximum allowable vibratory stress for a given speed, the change of the damping coefficient with the mounting of a strain gage at the base of the blade, the effect of rotor speed, on blade natural frequency, and the effect of the order of first bending-mode vibration on stress. It was found that for all stages the lower the order of vibration the higher the stress but no destructive vibrations were detected.
Contributing Partner: UNT Libraries Government Documents Department
Vibration survey of NACA 24-inch supersonic axial-flow compressor

Vibration survey of NACA 24-inch supersonic axial-flow compressor

Date: July 30, 1948
Creator: Meyer, Andre J , Jr & Hanson, Morgan P
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration surveys of the P-40 rudder and fin-rudder assembly

Vibration surveys of the P-40 rudder and fin-rudder assembly

Date: January 1, 1943
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration surveys of the P-47-B rudder and fin-rudder assembly

Vibration surveys of the P-47-B rudder and fin-rudder assembly

Date: April 1, 1943
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department