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NUMERICAL SIMULATION OF SIDEWALL EFFECTS ON ACOUSTIC FIELDS IN TRANSONIC CAVITY FLOW

LI, ZHISONG
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1172869775

Abstract Details

2007, MS, University of Cincinnati, Engineering : Aerospace Engineering.
This thesis deals with the effects of the two types of sidewalls boundary conditions, namely slip and periodic, impact the computed acoustic field of transonic cavity. A Menter-SST based detached eddy simulation (DES) is adopted as the main turbulence modeling methodology. The hybrid DES approach for modeling turbulence enables the achievement of the desired eddy resolution in the massively separated flow region within the cavity without resorting to the excessive grid requirements of large eddy simulations (LES). Furthermore, the numerical resolution of the wide dynamic range involved is accomplished through the use of Roe third order scheme. Near-wall simulation is approximated by a wall function to reduce computational costs for the unsteady high Reynolds number flow. Simulations were performed on a multi-zone structured domain by parallel processing using the WIND code. Computational results are presented for the instantaneous velocity, vorticity, Mach number, pressure fluctuations and for the sound pressure level (SPL) and turbulent kinetic energy (TKE) spectra within the cavity. The spectra, which were generated using the maximum entropy method, are presented for the slip and periodic sidewall boundary condition cases. A comparison with available experimental results, indicate that the slip sidewall boundary conditions produce SPL spectra in better agreement with the experimental results. A summary of computational costs is presented to demonstrate the savings compared to prior low Reynolds number results obtained using DES and LES methods. Time series analyses were also taken on sidewall points and compared of the two cases with different boundary conditions.
Dr. Awatef Hamed (Advisor)
67 p.
Engineering, Aerospace
transonic cavity flow acoustics

Recommended Citations

Citations

  • LI, Z. (2007). NUMERICAL SIMULATION OF SIDEWALL EFFECTS ON ACOUSTIC FIELDS IN TRANSONIC CAVITY FLOW [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1172869775

    APA Style (7th edition)

  • LI, ZHISONG. NUMERICAL SIMULATION OF SIDEWALL EFFECTS ON ACOUSTIC FIELDS IN TRANSONIC CAVITY FLOW. 2007. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1172869775.

    MLA Style (8th edition)

  • LI, ZHISONG. "NUMERICAL SIMULATION OF SIDEWALL EFFECTS ON ACOUSTIC FIELDS IN TRANSONIC CAVITY FLOW." Master's thesis, University of Cincinnati, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1172869775

    Chicago Manual of Style (17th edition)

ucin1172869775
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© 2007, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.