Accession Number:

ADA167554

Title:

Laser Velocimeter Measurements and Analysis in Turbulent Flows with Combustion. Part 4. Two-Component Cold-Flow Measurements.

Descriptive Note:

Final rept. 1 Jan 81-2 Oct 84,

Corporate Author:

PURDUE UNIV LAFAYETTE IN SCHOOL OF MECHANICAL ENGINEERING

Personal Author(s):

• Thompson,H. D.
• Stevenson,Warren H.
• Gould,R. D.

Report Date:

1986-03-01

Pagination or Media Count:

36.0

Abstract:

A unique two component, two color Laser doppler Velocimeter LDV has been designed and built. The system includes Bragg cell modulators in all four beams, and a correction lens system to correct for the aberration induced by the cylindrical quartz test section. A dedicated PDP 1140 mini-computer with DMA capability is used for data collection, storage, and processing. Two component axial and radial velocity measurements have been made in the turbulent flow field following an axisymmetric sudden expansion. Mean streamwise and radial velocity and turbulence intensity measurements were made. Reynolds stresses were computed. Keywords Turbulent measurements Laser velocimeter Bias errors Recirculating flows.

Descriptors:

• *TURBULENT FLOW
• *COMBUSTION
• *LASER VELOCIMETERS
• *COLD FLOW
• STRESSES
• VELOCITY
• MEASUREMENT
• INTENSITY
• TURBULENCE
• TEST EQUIPMENT
• QUARTZ
• PROFILES
• CYLINDRICAL BODIES
• COLORS
• ERRORS
• DATA ACQUISITION
• MEAN
• BIAS
• MULTIPLE BEAMS(RADIATION)
• LENSES
• CORRECTIONS
• LIGHT MODULATORS
• DOWNSTREAM FLOW
• DOPPLER EFFECT
• MOMENTUM TRANSFER
• BRAGG ANGLE
• RECIRCULATION
• RADIAL VELOCITY

Subject Categories:

• Optical Detection and Detectors
• Fluid Mechanics
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE