Accession Number:

AD1182423

Title:

Coupled CFD and Structural Solver for Flapping Wing Simulations

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DCGEORGE MASON UNIV FAIRFAX VAAPPLIED SIMULATIONS INC MCLEAN VA

Personal Author(s):

• Ramamurti, Ravi
• Geder, Jason
• Viswanath, Kamal
• Lohner, Rainald
• Soto, Orlando
• ,
• ,

Report Date:

2022-10-12

Pagination or Media Count:

22

Abstract:

A fluid structure interaction modeling tool is developed for the simulation of thrust generation using flexible flapping wings. Three models are developed by coupling the computational fluid dynamics CFD solver with different computational structural dynamics CSD solvers. The first model, a coupled solver based on eigenmodes is validated using the well-known Turek-Hron benchmark problem. The second model, a coupled solver for membrane cases is developed and tested for 2-D flow cases at various angles of attack and compared with results in the literature. The third model, a comprehensive structural solver coupled to the CFD solver is developed and tested for a flapping wing comprised of carbon fiber spars with mylar membrane between them. Several parametric studies are performed for this configuration varying the stroke amplitude and flapping frequency of the wing.

Descriptors:

• computational fluid dynamics
• fluid dynamics
• aircrafts
• two dimensional
• unmanned aerial vehicles
• computational science
• fluid flow
• three dimensional
• incompressible flow
• modulus of elasticity
• mechanics
• carbon fibers
• geometry
• unmanned underwater vehicles
• pressure distribution
• engineering
• flow

Subject Categories:

• Fluid Mechanics

Distribution Statement:

[A, Approved For Public Release]