Aerodynamic Simulations with AcuSolve

External aerodynamic plays an important role in many disciplines during the product development process. An automobile’s fuel efficiency and handling behavior is affected by the external flow around the vehicle and an airplane just can’t fly without adequate aerodynamic properties. The efficiency of a wind turbine and also the turbine’s acoustic behavior is determined by its aerodynamics. Computational fluid dynamics (CFD) simulations are well established tools in today’s development cycle to study the external aerodynamics. CFD technology helps the engineers to understand the physical phenomena and provides an environment to optimize the performance with respect to certain design criteria.

Altair’s general purpose CFD solver AcuSolve is applying a finite-element technology to solve the fluid dynamic equations on an unstructured mesh topology. The finite-element approach yields high accuracy with very low requirements on mesh quality. The flow solver is developed for parallel execution on shared and distributed memory computer systems yielding quick turnaround times for typically large external aerodynamic model.

In this presentation, external aerodynamic results for classical automotive benchmarks as well as realistic vehicles are discussed. The fluid-structure-interaction (FSI) capabilities of AcuSolve are used to study the deflection of an automotive rear wing.

Furthermore , an external aerodynamic study of a wind turbine is presented including FSI effects of the rotor blades.

 

The Author

Marc Ratzel
Altair