title: Directional acoustic underwater thruster.
abstract: This study describes a tested prototype for a controllable directional underwater thruster with no moving parts. During operation, a high-intensity acoustic wave creates directional water jets and the device moves itself in the opposite direction. When the underwater thruster moves along a non-vertical angle, it can produce straight backward thrust of 2.3 mN and lateral thrust of 0.6 mN in parallel with the device surface, with a total thrust-to-weight ratio of 2:1. To enhance the acoustic streaming effect, a self-focusing acoustic transducer (SFAT) with air reflectors is used to focus the acoustic wave.
authors.forename: Ziyu
authors.initials: Z
authors.lastname: Wang
authors.forename: Xiaotun
authors.initials: X
authors.lastname: Qiu
authors.forename: Jie
authors.initials: J
authors.lastname: Zhu
authors.forename: Jon
authors.initials: J
authors.lastname: Oiler
authors.forename: Shih-Jui
authors.initials: SJ
authors.lastname: Chen
authors.forename: Jing
authors.initials: J
authors.lastname: Shi
authors.forename: Eun
authors.initials: E
authors.lastname: Kim
authors.forename: Hongyu
authors.initials: H
authors.lastname: Yu