Comparisons between the new airfoils and reference airfoils based on numerical predictions indicate that the proposed method with the newly established mathematical model can effectively balance the complex requirements of the airfoil and improve its overall performance. Through 2 design cases, new airfoils with desirable aerodynamic characteristics and improved overall performance were obtained. Then, an integrated optimization design platform is established for outboard airfoils.

Thus, this paper proposes a new mathematical model for overall airfoil optimization using the airfoil performance evaluation indicators. The requirements for improving the structural performance and reducing the aerodynamic noise were combined with the following aerodynamic design considerations: high efficiency, low extreme loads, stability, and a wide operating region. Based on the complex flow characteristics of the rotor blades and the varying requirements along the span of a blade, the design principles of outboard airfoils were investigated. This paper presents an optimization method for the overall performance of outboard wind turbine airfoils. Therefore two configurations of tractor propulsion were tested to see, if their performance is better than the performance of original design.ĭesigning the primary airfoils for the outboard part of wind turbine blades is a complicated problem of balancing structural, aerodynamic, and acoustic requirements. However, in case of the UAV, this reason becomes insignificant. It was applied because the demonstrator was a flying model of manned airplane and the tractor configuration would affect the pilot’s field of observation.

Results led to a conclusion, that the inverted joined wing configuration allows to build an airplane with excellent performance, but its advantage against the conventional airplane is marginal because of large trimming drag of the configuration with relatively high position of the thrust vector in pusher configuration. Therefore, a project consisting of development of an experimental scaled demonstrator, and its wind tunnel and flight testing, was undertaken by consortium: Institute of Aviation, Warsaw University of Technology, Air Force Institute of Technology and a MSP company.

The inverted joined wing configuration, with the upper wing in front of the lower one is an example of such concept. A few of them were not investigated thoroughly enough yet. There are several airplane concepts that potentially allow for increasing the efficiency. Efficiency is a crucial parameter for an airplane to reduce both cost of operations and emission of pollutants.

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