Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Warren H. Stevenson"'
Publikováno v:
Journal of Propulsion and Power. 10:639-645
Experimental measurements of velocity and temperature were made in a low-speed turbulent flowfield following an axisymmetric sudden expansion with and without combustion. The combustion case considered here used a lean, completely premixed propane-ai
Autor:
Warren H. Stevenson, E. D. Hirleman
Publikováno v:
Applied optics. 17(21)
A generalized method for determining the properties of a Gaussian laser beam focus including waist radius, position, and intensity distribution is presented. Of significance to in situ laser diagnostic methods is a unique analysis of illuminated area
Publikováno v:
Applied optics. 15(12)
Publikováno v:
Applied optics. 15(4)
Publikováno v:
Applied optics. 14(1)
Approximate methods for calculating the error introduced by the deflection of the light beam or refractive error in schlieren, shadowgraph, interferometric, and holographic measurements of transport phenomena are investigated. Relative error is repor
Publikováno v:
Journal of Fluids Engineering. 114:107-112
An optical technique is described for determining, in a physically nondisturbing manner, the thickness of a thin flowing liquid film. The technique is based on measurement of the fluorescent emission induced in the liquid film by absorption of a focu
Publikováno v:
Journal of Laser Applications. 4:29-36
Optical triangulation is a very old method of determining absolute distance to an object. In recent years laser range sensors utilizing this principle have seen growing use, particularly in the auto industry. More accurate versions are being employed
Autor:
Paul G. Backes, Warren H. Stevenson
Publikováno v:
Journal of Laser Applications. 2:33-39
Optical methods for the measurement of position, part dimensions, or alignment are finding increased application in manufacturing operations. Several of these methods utilize analog or digital position sensitive detectors to find the centroid of an i
Publikováno v:
AIAA Journal. 28:276-283
Simultaneous two-component laser velocimeter measurements were made in the incompressible turbulent flowfield following an axisymmetric sudden expansion. Mean velocities, Reynolds stresses, and triple products were measured and are presented at axial
Publikováno v:
Proceedings of the IEEE 1992 National Aerospace and Electronics Conference@m_NAECON 1992.
Many of the performance characteristics of triangulation sensors are obvious, but others are more subtle and do not appear to have been examined in the open literature. The authors examine these characteristics in detail. One aspect was to compare re