• Login
    View Item 
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Assessment of tip planform effects on the hover characteristics of helicopter rotors

    Thumbnail
    View/Open
    ZHOU-DISSERTATION-2019.pdf (3.798Mb)
    Date
    2019-04-02
    Author
    Zhou, Chong
    Metadata
    Show full item record
    Abstract
    A distinguishing feature of helicopters compared to other flight vehicles is their reliance on the main rotor for all forces and moments needed to operate the vehicle. With the use of cyclic and collective pitch variations, pilots can readily vary and control the thrust, propulsive and side forces. Pilots can also control the vehicle attitude by tilting the rotor disk. Because helicopters spend a bulk of the operations in hover, rotors are first designed to ensure optimum hover performance, before other aspects of operations such as forward flight and maneuvers. The objective of this research is to capture and investigate the effects of blade tip planform influence on rotor aerodynamics in hover. This work is guided by a set of test data for several advanced planforms, with the S-76 rotor serving as the baseline. The present studies indicate that swept tapered rotors with an anhedral tip achieve the best performance in hover. Therefore, detailed analysis of how the anhedral tip shape improves the flow field is investigated in the research. It shows from the results that adding anhedral angles to the tip changes the tip vortex position and blade wise circulation, hence a more uniform induced velocity distribution is obtained.
    URI
    http://hdl.handle.net/1853/61240
    Collections
    • Georgia Tech Theses and Dissertations [23403]
    • School of Aerospace Engineering Theses and Dissertations [1409]

    Browse

    All of SMARTechCommunities & CollectionsDatesAuthorsTitlesSubjectsTypesThis CollectionDatesAuthorsTitlesSubjectsTypes

    My SMARTech

    Login

    Statistics

    View Usage StatisticsView Google Analytics Statistics
    facebook instagram twitter youtube
    • My Account
    • Contact us
    • Directory
    • Campus Map
    • Support/Give
    • Library Accessibility
      • About SMARTech
      • SMARTech Terms of Use
    Georgia Tech Library266 4th Street NW, Atlanta, GA 30332
    404.894.4500
    • Emergency Information
    • Legal and Privacy Information
    • Human Trafficking Notice
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    © 2020 Georgia Institute of Technology