Title page for ETD etd-09272001-173833

Type of Document Master's Thesis
Author Eddy, Grant Lee
URN etd-09272001-173833
Title Study of Steady-State Wake Characteristics of Variable Angle Wedges
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
King, Peter S. Committee Chair
Dancey, Clinton L. Committee Member
O'Brien, Walter F. Jr. Committee Member
  • Wedge
  • Transient
  • Gas Turbine Engine Testing
  • V-Gutter
  • Inlet Distortion
  • Wake
Date of Defense 2001-09-21
Availability unrestricted
Current methods of creating inlet total pressure distortion for testing in gas turbine engines are only able to simulate steady-state distortion patterns. With modern military aircraft it is becoming necessary to examine the effects of transient inlet distortion on engines. One alternative being evaluated is a splitting airfoil that is essentially a wedge that can be set at different opening angles. An array of such devices would be placed in front of the engine for testing that would be capable of creating steady-state distortion patterns as well as transient distortion patterns by changing the opening angle of the airfoils.

The work here analyzes the steady-state wake characteristics of some of the splitting airfoil concepts. Single-wedge tests were conducted with various opening angles in an attempt to classify the various aspects found in the wake pattern. It was found that the wake has completely different characteristics with larger opening angles. In addition, several different combinations of wedges were also examined to see if single wedge analysis could be applied to arrays of wedges. Analysis was done on combinations of wedges aligned vertically as well as combinations that were done horizontally. It was found that single wedge characteristics change considerably when different wake patterns interact with each other

  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  Eddy1.pdf 2.97 Mb 00:13:45 00:07:04 00:06:11 00:03:05 00:00:15

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.