Studies of Ultrasound Distribution and Ultrasound Generation Efficiency of Transducers

  • Author / Creator
    Ge, Chang
  • Renewable energy production is an important application of ultrasound waves. Ultrasound waves can increase the ethanol and biodiesel generated by biomass during metabolic behaviour. Ultrasound distribution and ultrasound generation efficiency of transducers are important for these applications. The ultrasound distribution and ultrasound generation efficiency of transducers were studied in this project. Theories of ultrasound distribution and ultrasound transducer were studied during literature survey. A method of transducer modeling was proposed based on research works before for studies of ultrasound distribution of a cylindrical transducer, which will be used in biodiesel production system in the future. Validation of the model was carried out. The model of a cylindrical transducer was built. The ultrasound distribution described by the model was validated by both simulation in MATLAB and measurement by a hydrophone. Studies of ultrasound generation efficiency were carried out from a mechanics point of view. Governing equations for displacement distribution over the transducer active surface were studied. A physical quantity was proposed for comparison of generation efficiency between different transducer structures. Transducer arrays with rectangular plate transducers being the element were validated by MATLAB simulation to be more efficient in ultrasound generation than a cylindrical transducer. A triangular prism transducer array was proposed to replace a cylindrical transducer in applications.

  • Subjects / Keywords
  • Graduation date
    Spring 2015
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.