The flow around an elastic body is treated as a fluid-structure interaction (FSI), numerous fluid-structure coupled problems have been performed. Recently, two-way coupled analysis, which considers the fluid-structure interaction, has been performed extensively. In the present paper, we simulate a flow field around an elastic heaving flat plate with a variable surface shape and various Young’s moduli and perform bi-directional coupling analysis using ANSYS 12.1/ANSYS-CFX 12.1. In the case of the results without projection, the vorticity that grows along the plate surface, rolled up from the trailing edge, and developed in the wake are dependent on Strouhal number, independent of the Young’s modulus. However, in the case of the results with the projections, the vortex behaviors are different with the Young’s modulus. At E = 3.53 [MPa], the projections effect on the vortex behavior and the dynamic thrust exhibit approximately the same tendency with or without a projection. On the other hand, at E = 10.0 [MPa], the projection effect has an impact on the vortex behavior and the dynamic thrust. The vorticity and the dynamic thrust of E = 10.0 [MPa] become smaller than that of E = 3.53 [MPa] because of strong effects from the projections of the heaving elastic plate.
A nurnber of s加 dies of 且ow fields around unsteady rno 血 g airbils have examined . In particular , flow fields around 且exible moVing bodies attracted a great deal of attention and their elastic advantages fbr flow fields have gradually been olarified . Howeve ろ fbr 血er research and discussion of the elastic effeCt 丘 )r flow丘elds are needed because of di缶 。ulties of 鳴 ent of bend血 g sti舳 ess , E 正 , which is determined by cube of a material thickness and stiflhess correspends te the resistance to cross − sectional deformation . Therefbre , it is impo 服 mt to 。1arify the effects of bending stif〔 hess to the flow field and dynamic fbrces . In the present paper, we simulate the 且uid stucture interaction simulation of flow field around an elastic moving bod メ The purl 〕 ose ofthis study is to clarify the effect of bending stiflhess to the characteristics ofdynamic for ( rp acting on the elastic moving body, Key W ( ) 耐 s :Elastic moving body , Bending stiffrless , CharaCteristics of dynamic fbrce , Fluid structure interaCtion
The flow field around a moving body is treated as a fluid-structure interaction (FSI), which is a series of phenomena from the elastic deformation of a body to vortex generation/growing/development. In the present paper, we simulate the fluid structure interaction of a flow field around an elastic heaving thin film with large deformation using ANSYS 12.1/ANSYS-CFX 12.1, and clarify the elastic deformation, velocity, acceleration, vortex roll-up from the trailing edge, circulation, and dynamic lift, as well as other important parameters to obtain the vorticities, circulations and dynamic lifts. The elastic deformation, velocity and acceleration can produce the large vorticity and the circulation. In particular, the vorticity that rolled up from the trailing edge of the thin film is dependent on the elastic velocity, and the vorticity production at the trailing edge is dependent on the elastic acceleration. Moreover, the vortex production is also distributed to the circulation production and the dynamic lift. Therefore, the elastic deformation, velocity and acceleration can produce and change the flow field for the vorticity, circulation, and dynamic force.
A flow field around moving elastic airfoil has attracted significant attentions in recent years. A flow around an elastic body is treated as a coupled problem of a fluid and a structure. However, impacts of elasticity on a flow field and differences from a flow field in the wake of a ngid airfoil have not been clarified yet. The purpose of the present study is to perform the fluid-structure interaction analysis using ANSYS 11.0 and ANSYS CFX 11.0 and is to clarify the wake structure.
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