Simulations of Bio-Inspired Flexible Flapping Fins
Abstract
A fluid structure interaction modeling tool developed for the simulation of thrust generation using flexible flapping wings is used to model flexible fins for Unmanned Underwater Vehicle applications. The coupled solver based on eigenmodes is used to model the flexible fins flapping in tandem separated by an axial offset. The effect of flexibility of the fin is studied using material of two different Young's moduli and compared with its rigid counterpart. Parametric studies were conducted varying the axial offset distance, the phase offset between the tandem fins and the flapping fin kinematics. Analysis shows that the flexibility of the fin and the phase offset play an important role in the thrust production of the rear fin. The data in terms of velocity and vorticity at several axial planes are provided to validate the experimentally obtained PIV flow results and to improve the understanding of these complex propulsive systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 05, 2024
- Accession Number
- AD1225469
Entities
People
- Jason Geder
- Kamal Vaiswanath
- Kaushik Sampath
- Rainald Löhner
- Ravi Ramamurti
Organizations
- United States Naval Research Laboratory