Title page for ETD etd-81597-94044

Type of Document Master's Thesis
Author Mathes, Andrew R.
Author's Email Address none_available@vt.edu
URN etd-81597-94044
Title Experimental Analysis of an Advanced-Design, Quasi-Radial Diffuser Receiving an Oscillating Jet
Degree Master of Science
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
Gürdal, Zafer
Hajj, Muhammad R.
Telionis, Demetri P. Committee Chair
  • none
Date of Defense 1997-07-01
Availability unrestricted
Methods of experimental analysis of airflow through an advanced-design, quasi-radial

diffuser receiving an oscillating jet induced by a rotating baffle were devised and

performed. The initially unsteady flow was found to lose its unsteadiness as it progressed

through the diffuser and exited into the atmosphere. Within the diffuser, regions of slow

flow in the lee of ventilation holes exist due to entrainment. The addition of a

convergence insert across from these holes increased flow speeds, but also deflected the

flow farther away from the holes, aiding separation. The predominantly steady flow over

a flat plate upon which the exiting flow impinged produced an asymmetric static pressure

profile. This was probably due to the mechanism that set up the oscillations in the flow,

the rotating baffle.

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