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An Analysis of the Nonlinear Interaction of Peak Frequencies in Resonant Cavity Flows

Malone, James Michael
http://rave.ohiolink.edu/etdc/view?acc_num=osu1204037947

Abstract Details

2008, Master of Science, Ohio State University, Mechanical Engineering.
Shallow cavity flows, commonly found on aircraft, are currently an area of significant research. Active flow control is desirable to improve aircraft performance and efficiency at high speeds and is aided by research into the physical mechanisms behind such cavity flows. Data collected over the range of Mach numbers from 0.20 to 0.70 at OSU's Gas Dynamics and Turbulence Laboratory allow identification of frequency trends. Observations confirm the presence of Rossiter modes as well as the fundamental aeroacoustic loop, proposed by Delprat. Characteristic frequency content are identified for various Mach number sub-ranges, each corresponding to the close proximity between an aeroacoustic loop modulated frequency and an acoustic frequency. These results confirm that the amplitude modulation process described by Delprat explains deviations in the cavity behavior from the predicted Rossiter mode frequencies. Variations with Mach number necessitate the investigation of a range of Mach numbers to correctly identify spectral peaks.
Dr. Mohammad Samimy (Advisor)
Dr. Michael Dunn (Committee Member)
61 p.
Acoustics; Engineering; Fluid Dynamics; Mechanical Engineering; Technology
Rossiter modes; rectangular; cavity; resonance; amplitude modulation; fundamental aeroacoustic loop

Recommended Citations

Citations

  • Malone, J. M. (2008). An Analysis of the Nonlinear Interaction of Peak Frequencies in Resonant Cavity Flows [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204037947

    APA Style (7th edition)

  • Malone, James. An Analysis of the Nonlinear Interaction of Peak Frequencies in Resonant Cavity Flows. 2008. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1204037947.

    MLA Style (8th edition)

  • Malone, James. "An Analysis of the Nonlinear Interaction of Peak Frequencies in Resonant Cavity Flows." Master's thesis, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1204037947

    Chicago Manual of Style (17th edition)

osu1204037947
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© 2008, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.