TY - JOUR
AU1 - Yin, Hang
AU2 - Zhang, Chen
AU3 - Xu, Yan
AU4 - Heng, Jinlong
AB - Snapping shrimps close their special shaped claw to generate a cavitating water jet with high speed, and the pressure pulse can be generated by cavitating bubble bursting. The cavitating jet is produced by its pincers, with the characteristic of high energy focusing. Therefore, for the cavitation jet, it is of great significance to explore the law of cavitation and the focusing principle, which can inspire us to investigate the cavitation effects and develop the bionic cavitation device. In this paper, a bioinspired snapping-claw apparatus with ideal cavitation effect was obtained after a series of optimization designs. And a hypothesis on the principle of cavitation generated by the bioinspired apparatus was proposed. The general process is as follows: on the basis of the existing CT scan and geometric surface reconstruction of the actual shrimp, a 3D bionic model that preserves the basic geometric features was established. By solving the dynamic equation of the bubble, the critical conditions of cavitation, temperature and maximum pressure at the moment of bubble bursting are obtained. To explore the characteristics of pincers that have influences on energy focusing mechanism and cavitation effects, on the basis of the results obtained through CFD simulation, the optimized bionic structure and the influencing principle was obtained through continuous improvement of several groups of simulation. The typical parts of bionic structures that influence submerged cavitation jets were summarized as well. Furthermore, a series of corresponding control groups were set for the sizes of these typical parts of structures respectively, and the influences of these typical parts with different sizes on the cavitation effect were explored. Finally, combined with the surface morphology of real pincers of snapping shrimps, the qualitative hypothesis of cavitation mechanism during the closure of the snapper-claw was raised based on the simulation results finished.
TI - Structural Design and Jet-Cavitation Mechanism of Bioinspired Snapping-Claw Apparatus
JF - Journal of Vibration Engineering & Technologies
DO - 10.1007/s42417-021-00397-5
DA - 2022-02-01
UR - https://www.deepdyve.com/lp/springer-journals/structural-design-and-jet-cavitation-mechanism-of-bioinspired-snapping-0UEQkHH0G1
SP - 649
EP - 666
VL - 10
IS - 2
DP - DeepDyve
ER -