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Document Details
Document Type
:
Thesis
Document Title
:
EXPERIMENTAL STUDY OF WAKE VORTEX FLOW AT HIGH ANGLES OF ATTACK
دراسة تجريبية لسريان المخر الدوامي عند زوايا الهجوم العالية
Subject
:
Faculty of Engineering - Department of Aeronautical Engineering
Document Language
:
Arabic
Abstract
:
Flow over slender axisymmetric bodies at high angles of attack exhibits the development of an asymmetric mode of wake vortex flow. The current thesis aims to perform detailed measurements and analysis of temporal and spatial scales inherent in the steady and unsteady wake vortex flow. Preliminary experimental work is directed to enhance the performance of wind tunnel employed measurements. These include measuring tunnel streamwise wall pressure distribution, mean flow velocity profiles in addition to turbulence intensity and its spectra. Detailed instantaneous three dimensional velocity fields are carried out using Tomo-PIV measurement technique at 40º angle of attack and different Reynolds number ranges from 1.0 x 104 to 4.5 x 104. Results show that the presence of two main asymmetric counter rotating vortices at all Reynolds number investigated. The Reynolds numbers affect the configuration of the two main vortices where vortex flipping observed at the lowest Reynolds number investigated. Time averaged quantities such as velocity vectors plots, vorticity contours and streamlines are calculated and presented. Averaged quantities are suffered from the expected smoothing of details that have short duration. Instantaneous flow field data such as streamlines shows possible interaction between the main vortices and model attached vortices. Also, the core of the two main vortices can be seen affected by the appearance of multiple vortex filaments.
Supervisor
:
Dr. Salah Hafez
Thesis Type
:
Master Thesis
Publishing Year
:
1434 AH
2013 AD
Co-Supervisor
:
Dr. Khalid Juhany
Added Date
:
Monday, March 11, 2013
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
سراج عمر الزهراني
ALZHRANI, SERAJ OMAR
Researcher
Master
Files
File Name
Type
Description
35190.pdf
pdf
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