4 papers
Swim-and-Breach at Palm Scale: A Rudder-Steered Two-Propeller Underwater Robot Platform with Differential-Thrust Pitch Control
Daehyun Choi, Ian Bergerson, Hengjia Zhu +2
We present a palm-scale (65 mm, 34 g) swim-and-breach robot platform. Two vertically stacked propellers provide both propulsion and differential-thrust pitch control under a propor…
Multi-objective Bayesian optimization of rigid and flexible nozzles for energy-efficient pulsed jet propulsion
Paras Singh, Yukesh Karki, Victor Hernandez +3
The biomechanics of pulsed-jet propulsion in aquatic animals, including squids and jellyfish, provide valuable insights into energy-efficient locomotion. In these organisms, flexib…
Squid funnels time their elastic recoil to amplify pulsed jets
Daehyun Choi, Paras Singh, Ian Bergerson +12
Pulsed jets propel squid across nearly four orders of magnitude in body size. Each pulse leaves through the funnel, a soft nozzle, but whether its compliance acts within a pulse is…
Computational and reduced-order modelling of elastic wave-driven impulse enhancement in pulsed jets through passively flexible nozzles
Daehyun Choi, Paras Singh, Saad Bhamla +1
Elastic wave propagation and energy exchange in passively deforming cylindrical nozzles are investigated through three-dimensional, two-way fluid-structure interaction simulations.…