Research on influence of slat brackets of large airplane

Influence of slat brackets on aerodynamic performance of a large airplane was obtained through numerical simulation and wind tunnel test. Slat brackets' influence on flow around slat gap and wing surface was analysed, and the rules of influence of the parameters of slat brackets were obtained. Results of numerical simulation show that flow around wing surface is changed, flow velocity around boundary layer decreases and brings some degradation of stall performance as a result of blocking due to slat brackets. Results of wind tunnel test show that stall performance can be improved by the ways of reducing width and quantity of slat brackets as well as using slat brackets with circular cross section and outward bending, and the test results of small scale models are significantly influenced by the parameters of slat brackets. Study results can provide designing reference for slat brackets model in both 3m and 8m magnitude wind tunnel.