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Now showing items 1-9 of 9
The automatic identification of aerospace acoustic sources
(Virginia Tech, 1989-02-15)
<p>This work describes the design of an intelligent recognition system used to distinguish noise signatures of five different acoustic sources. The system uses pattern recognition techniques to identify the information ...
Rule-based fuselage and spine and cross-section methods for computer aided design of aircraft components
(Virginia Tech, 1993-05-04)
<p>In recent years, the use of computer-aided design (CAD) systems for conceptual aircraft design has greatly increased. As a result, new and better methods for creating surface models of aircraft geometry using dimensional ...
Intersection and filleting of non-uniform B-spline surfaces
(Virginia Tech, 1991-01-29)
<p>Preliminary aircraft design codes requIre a more complete and integrated geometry definition than that used by conceptual design codes. This thesis documents the design and creation of an interactive CAD system which ...
Reverse parameterization of B-spline surfaces for data transfer
(Virginia Tech, 1993)
This thesis presents the algorithms and methods for transferring B-spline surface data from a final design CAD tool to a parameter based conceptual design CAD tool. Both codes store data in different ways, requiring a ...
Dynamic surface temperature measurement on the first stage turbine blades in a turbofan jet engine test rig
(Virginia Tech, 1988-12-03)
Turbine blade surface temperatures were studied during transient operation in a turbofan engine test rig. A single fiber radiation pyrometer was used to view the suction side of the blades from approximately 60 percent ...
Performance and stalling behavior of an axial-flow compressor subjected to three circumferential inlet distortion levels
(Virginia Tech, 1977-10-15)
<p>The performance and stalling behavior of an axial-flow compressor subjected to several different inlet distortion patterns was investigated. The effect of inlet distortion on overall compressor performance was determined ...
The characterization of the flowfield of a dump combustor
(Virginia Tech, 1990-09-05)
<p>To provide quality benchmark data (that can be used in numerical simulation comparisons) and to examine the effects of combustion on a typical ramjet engine flowfield, a water-cooled, stainless steel dump combustor model ...