This work addresses the development and optimization of propellers in particular of propeller-pumps used in cardiac support (left ventricular assist devices). A novel propeller design method is firstly validated for high-Re marine, multiblade propellers and is adapted afterward for designing small propeller-pumps used as left ventricular assist devices. The initial design framework (ADAP) is fully inverse for the case of marine propellers and is coupled with 3D CFD calculations. In addition, for marine propellers, a Blade Element Method (BEM) is developed for predicting off-design performance. The propeller designer can thus engage in a much faster goal-oriented design parameter search without the use of full 3D-CFD calculations. For the cardiac propeller-pump the design is performed both direct and inverse and has to be always accompanied by CFD simulations. The complexity of the flow around an encased propeller prevents the propeller designer from using BEM in this case. A propeller design framework (ADAP) with different radial momentum loss theories was developed in Matlab and validated against state of the art vortex-lattice methods. ADAP was programmed to write geometry data to grid generators (e.q. ANSYS TurboGrid) reducing the time needed from aerodynamic design to CFD simulation. It can also write structured data files which are needed for CAD systems for parametric generation of geometries. In the present work the interface was written for Creo. Instead of using only predefined NACA camber lines for the radial sections of propellers the framework is improved by implementing a novel method of computing thin airfoil cascades. This method is helpful in the case of designing propellers with more than 4 blades, where blade to blade effects are significant, as for example in the case of propellers used for large container ships. CFD results showed that by using the design code presented in this thesis the thrust of a 6 blades marine propeller was improved by 3.5% and was accompanied by a small propulsive ...


    Access

    Download


    Export, share and cite



    Title :

    Development of an inverse design method for propellers with application on left ventricular devices ; Entwicklung einer inversen Auslegungsmethode für Propeller und derer Anwendung auf linksventrikuläre Unterstützungspumpen


    Contributors:

    Publication date :

    2017-01-01


    Type of media :

    Theses


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629




    Kennfeldverhalten und Auslegungsmethode beim Druckwellenlader Comprex

    Mayer,A. / El Nashar,I. / Komauer,C. | Automotive engineering | 1984


    Propellers and propeller related vehicles

    REHKEMPER JEFFREY / JOHNSON KEITH / GRISOLIA NICHOLAS | European Patent Office | 2018

    Free access

    Entwicklung einer sicheren Auslegungsmethode fur zukunftige PKW-Stufenautomaten durch den Abgleich von LK-Simulationen mit LK-Messungen

    Drees, S. / Mayer, K. / VDI-Gesellschaft Entwicklung Konstruktion Vertrieb | British Library Conference Proceedings | 2004


    Ship propeller device with auxiliary propellers

    ZHU WENCAI / HU GUOLIANG | European Patent Office | 2022

    Free access

    Stresses in propellers and propeller shafting

    Engineering Index Backfile | 1952