Now showing items 21-30 of 157
Development and modeling of a dual-frequency microwave burn rate measurement system for solid rocket propellant
(Virginia Tech, 1989-06-05)
<p>A dual-frequency microwave bum rate measurement system for solid rocket motors has been developed and is described. The system operates in the X-band (8.2-12.4 Ghz) and uses two independent frequencies operating ...
Total velocity vector measurements in an axial-flow compressor using a 3-component Laser Doppler Anenometer
(Virginia Tech, 1988-02-15)
Turbulence measurements and noise generation in a transonic cryogenic wind tunnel
(Virginia Tech, 1989-04-15)
<p>A high-frequency combination probe was used to measure dynamic flow quality in the test section of the NASA Langley 0.3-m Transonic Cryogenic Tunnel. The probe measures fluctuating stagnation (total) temperature and ...
Improvement of structural dynamic models via system identification
(Virginia Tech, 1988-12-05)
Proper mathematical models of structures are beneficial for designers and analysts. The accuracy of the results is essential. Therefore, verification and/or correction of the models is vital. This can be done by utilizing ...
Development and calibration of a heat flux microsensor
(Virginia Tech, 1989-02-03)
The concept, design, fabrication, and calibration of a new type of layered heat flux gage is described. Using thin-film microfabrication techniques the gage design is able to combine many of the desireable characteristics ...
Identifiability and parameter estimation in rail vehicle dynamics
(Virginia Tech, 1988-05-24)
Heat transfer from in-line and perpendicular arrangements of cylinders in steady and pulsating crossflow
(Virginia Tech, 1985-09-15)
<p>An investigation was conducted to determine the effect of organized flow pulsations on mean heat transfer from a single cylinder, in-line arrangements and perpendicular arrangements of cylinders. Pulsation frequencies ...
Active control of flexural power flow in elastic thin beams
(Virginia Tech, 1988-02-05)
<p>Active control of flexural power flow in infinite, semi-infinite and finite beams by point force inputs has been analytically and experimentally studied. The systems were analyzed by assuming wave solution and then ...
A turbulent combustion noise model
(Virginia Tech, 1989-05-05)
A turbulent combustion noise model based on first principles is developed in this thesis. The model predicts (1) the pressure time series, (2) Sound Pressure Level (SPL) spectrum, (3) Over-All Sound Pressure Level (OASPL), ...
Filleting of aircraft components using non-uniform B-spline surfaces
(Virginia Tech, 1989-05-29)
<p>Conceptual and preliminary aircraft design codes have different geometry requirements. Conceptual design codes use component based models, while preliminary design codes require a more complete and integrated geometry. ...