Laser Doppler Velocimeter Measurements in High Speed Flows.

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Abstract:

A three year research program covering the development and use of a Laser Doppler Velocimeter LDV for high speed flow measurements is described. The current configurations of the LDV optics and the high frequency signal processors are discussed. LDV measurements made in two-dimensional transonic nozzles and in the turbulent wake of an axisymmetric supersonic nozzle are presented. These are compared with previous experimental and analytical results. Excellent agreement is found to exist. Measurement problems presented by flows of extremely high turbulence intensity are illustrated and means for resolving them are discussed.

Author(s):
Thompson, H. Doyle ; Stevenson, Warren H. ; Flack, Ronald D. ; Zammit, Ronald E.
Author Organization(s):
PURDUE UNIV LAFAYETTE IND SCHOOL OF MECHANICAL ENGINEERING
Descriptive Note:
Final rept. 26 Aug 71-30 Jun 74,
Pagination:
0092

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RD-CR-75-2
Contract/Grant Number(s):
DAAH01-72-C-0089
Project Number(s):
DA-1-M-262303-A-214
Monitor Series:
CR-75-2
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*DOPPLER SYSTEMS, *NOZZLE GAS FLOW, *LASER VELOCIMETERS, SIGNAL PROCESSING, OPTICS, HIGH FREQUENCY, TURBULENT FLOW, PROBLEM SOLVING, MODEL TESTS, WAKE, COMPUTER APPLICATIONS, JET FLOW, ANEMOMETERS, SUPERSONIC NOZZLES, PARTICLE TRAJECTORIES, SEEDING, TRANSONIC NOZZLES
Field(s)/Group(s):
Fluid Mechanics
Report Date:
1975 Dec 31