Numerical Calculation Research of Measurement Method of Airfoil Drag Test in Wind Tunnel

A new method of drag calculation in Airfoil wind tunnel test by integral calculation of airfoil wake flow field information is presented.Numerical simulation of flow field around multi-element airfoil is finished and with computational information of airfoil wake flow field the airfoil drag is computed by both the traditional drag calculation method and the presented new airfoil drag calculation method.Then two kinds of drag calculation results are compared with the drag results attained by integral computation of surface pressure and shear stress to study the feasibility and accuracy of the presented new method.It is shown from the compare and analyses that for two-dimensional high-lift configuration(such as the multi-element airfoil)wind tunnel test,compared to traditional methods,the pesented new method can attained more accurate drag value.