Date of Award:
Master of Science (MS)
Mechanical and Aerospace Engineering
Separating oscillating and pulsating flows in an internal adverse pressure gradient geometry are studied experimentally. Simultaneous velocity-pressure measurements demonstrate that the minor losses associated with oscillating flow in an adverse pressure gradient geometry can be smaller or larger than for steady flow. Separation is found to begin high in the diffuser and propagate downward. Flows are able to remain attached further into the diffuser with larger Reynolds numbers, larger stroke lengths, and smaller diffuser angles. The extent of separation grows with Lo/h. The minor losses grow with increasing displacement amplitude in the range 10 < Lo/h < 40. Losses decrease with Re in the range of 380
King, Cameron V., "Time-Resolved PIV And Pressure Measurements Of Oscillating And Pulsating Flow In A Diffuser" (2008). All Graduate Theses and Dissertations. 106.
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