High-lift performance investigation of a two-element configuration with a two-stage actuator system

被引：37

作者：

Bauer, Matthias ^{[1
,2
]}

Lohse, Jakob ^{[1
,2
]}

Haucke, Frank ^{[1
,2
]}

Nitsche, Wolfgang ^{[1
,2
]}

机构：

[1] Technical University of Berlin, 10623 Berlin, Germany

[2] Department of Aeronautics and Astronautics, Germany

来源：

AIAA Journal | 2014年 / 52卷 / 06期

关键词：

Fighter aircraft - Engines - Landing gear (aircraft) - Strain gages - Wind tunnels;

D O I：

10.2514/1.J052639

中图分类号：

学科分类号：

摘要：

Different active flow control strategies have proven to be effective. The diameter of jet engines has increased significantly over the past decades, as manufacturers realize higher bypass ratios in order to limit fuel consumption. To avoid the need for larger and heavier landing gear those engines are moved closer to the wing. The experiments were carried out on a wind-tunnel model of the DLR-F15 high-lift airfoil in a two-element setup. This airfoil is a section of a three-element civil aircraft wing. A six-component strain gauge balance allows for measuring the forces and moments acting on the model. Surface pressure is measured at the midspan of the model at 32 stations on the main element and at 16 stations on the flap. The ejection angle of the jets is 30 deg relative to the models surface. The active area therefore covers approximately 73% of the span from end plate to end plate. Unsteady perturbations of the flow are generated by an array of fluidic diverters, which are based on the principle of fluid amplification.

引用

页码：1307 / 1313