Sock behavior study in flow around pitching airfoil in transonic regime

Subject Areas : Fluid Mechanic

Ali  Heydari ¹ (هیئت علمی)

Received: 2015-07-12 Accepted : 2015-08-12 Published : 2013-02-19

Keywords: Structured grid network, linear spring, Pitching, shock, transonic flow,

Abstract :

In this study, solution of unsteady flows with moving boundaries is considered. So that two dimensional inviscid unsteady and incompressible flow around an oscillating airfoil is investigated by solving Euler equation using structured adaptive grid network. An adaptive grid is produced using linear spring network, which can be attached to the surface of the object and modeled moving surface. The work initially focused on production of adaptive spring grid network and different state of adaptive grid production is investigated. After investigations of mesh and time step independency, the results are compare with experiments. Also, to show the advantages of structured adaptive grid network, the results are compared with unstructured adaptive grid network. The results show that use of adaptive structured network leads to increasing the speed of solution while maintaining the accuracy. Also it can be seen that in pitching airfoil, the shock behavior depends on the direction of movement, instant angle and mean angle of oscillation.