Accession Number:

ADA280276

Title:

Nonorthogonal Measurement Axes in Laser Doppler Velocimetry

Descriptive Note:

Final rept. Oct 1977-Sep 1978

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

• Crosswy, F. L.

Report Date:

1979-08-01

Pagination or Media Count:

28.0

Abstract:

The measurement axes of virtually all multiaxis laser Doppler velocimeter LDV systems are nonorthogonal to some degree and are, in general, rotated with respect to orthogonal, Cartesian reference axes. Systematic errors are introduced into the LDV data if axis nonorthogonality and spatial orientation parameters are not properly taken into account by the data reduction equations. This report develops the general 3-space expressions for velocity vector magnitude and spatial orientation in terms of rotated, oblique LDV measurement axis parameters and the velocity vector projections measured by each of these axes. Doppler systems, Laser velocimeters, Measurement, Orthogonality, Cartesian coordinates, Information, Velocity, Fluid flow.

Descriptors:

• *LASER BEAMS
• *LASER VELOCIMETERS
• *LIGHT SCATTERING
• AXES
• CARTESIAN COORDINATES
• DATA REDUCTION
• DOPPLER SYSTEMS
• FLUID FLOW
• LASERS
• ORTHOGONALITY
• VECTOR ANALYSIS
• VELOCITY

Subject Categories:

• Lasers and Masers
• Fluid Mechanics
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE