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A NUMERICAL STUDY OF A TRANSONIC COMPRESSOR ROTOR AT LARGE TIP CLEARANCE

MERZ, LOUISE F.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046728706

Abstract Details

2003, MS, University of Cincinnati, Engineering : Aerospace Engineering.
Experimental and numerical investigations have shown that flow in the tip region of high-speed, low aspect ratio, transonic compressors is detrimental to aerodynamic efficiency and operating range. Various computational fluid dynamic (CFD) models were compared to determine their influence on off-design predictions and tip flow structures. The models compared were: 1) steady isolated rotor, 2) unsteady isolated rotor, 3) unsteady stage. The κ-ε and κ-ω turbulence models were also compared. The near stall predictions were oscillatory in all cases. The largest variation in numerical results occurred due to choice of turbulence model. The inability to obtain a converged steady-state solution at low flow rates indicates the significance of an unsteady phenomenon present in the flow field indicating the need for unsteady flow simulations at off-design conditions. The current investigation has shown that unsteady isolated rotor simulations provide the most practical balance of accuracy in prediction and computational cost.
Dr. Paul D. Orkwis (Advisor)
tip modeling; off-design performance; turbulence modeling; transonic compressor; unsteadu

Recommended Citations

Citations

  • MERZ, L. F. (2003). A NUMERICAL STUDY OF A TRANSONIC COMPRESSOR ROTOR AT LARGE TIP CLEARANCE [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046728706

    APA Style (7th edition)

  • MERZ, LOUISE. A NUMERICAL STUDY OF A TRANSONIC COMPRESSOR ROTOR AT LARGE TIP CLEARANCE. 2003. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046728706.

    MLA Style (8th edition)

  • MERZ, LOUISE. "A NUMERICAL STUDY OF A TRANSONIC COMPRESSOR ROTOR AT LARGE TIP CLEARANCE." Master's thesis, University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046728706

    Chicago Manual of Style (17th edition)

ucin1046728706
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© 2003, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.