Masters Theses
Abstract
"Velocity profiles were measured using a three-component laser Doppler velocimeter in three-dimensional turbulent separated airflow downstream of a backward facing step in a rectangular duct. The upstream portion of the duct has a width of W = 8.0cm and a height of h = 0.98cm, which gives an aspect ratio of AR= 8. A step height of S = 1.0cm yields a downstream duct height of H == 1.98cm and an expansion ratio of ER= 2.02.
Inlet velocity distributions were measured, at the plane of the step, in order to provide inlet conditions for future CFD code validation. To characterize the reattachment of the flow, the location of an Xu line where the stream wise velocity is zero on a parallel plane 1 mm from the stepped wall was determined, and is reported for Reynolds numbers in the range 1390 :S Re :S 11370. Velocity distributions at several upstream and downstream locations relative to the Xu line were measured in the range 0.025 < y/ H < 0.98, and turbulent stresses were calculated. The streamwise velocity component was found to be closely matched by a 4th order polynomial curve fit. The resulting data should prove valuable for validating CFD codes and possibly as the basis for a general polynomial approximation to the behavior of the flow in such a test section"--Abstract, p. iii
Advisor(s)
J. A. Drallmeier
Committee Member(s)
Bassem F. Armaly
G. Gan
Department(s)
Mechanical and Aerospace Engineering
Degree Name
M.S. in Mechanical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Spring 2003
Pagination
x, 58 pages
Note about bibliography
Includes bibliographical references (pages 56-57)
Rights
© 2003 Brian Christopher Kaul, All rights reserved.
Document Type
Thesis - Restricted Access
File Type
text
Language
English
Subject Headings
Fluid dynamics
Thesis Number
T 8246
Print OCLC #
53278115
Recommended Citation
Kaul, Brian C., "Three-dimensional velocity measurements of three-dimensional turbulent separated flow" (2003). Masters Theses. 2341.
https://scholarsmine.mst.edu/masters_theses/2341
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