High-Lift Device

@SHAPE_BUILDER_ANALYSIS {
@SHAPE_BUILDER_NAME {HlfdName} {
@SHAPE_GROUP {AIRFOIL}
@SHAPE_TYPE {HIGH_LIFT_DEVICE}
@DIMENSIONS {
@DIMENSION_01 {c}
@DIMENSION_02 {ηs}
@DIMENSION_03 {η1}
@DIMENSION_04 {η2}
@DIMENSION_05 {ηe}
@DIMENSION_06 {tfT}
@DIMENSION_07 {twO}
@DIMENSION_08 {twI}
@DIMENSION_09 {hL}
@DIMENSION_10 {αL}
@DIMENSION_11 {hR}
@DIMENSION_12 {αR}
@DIMENSION_13 {α}
@DIMENSION_14 {β}
}
@MATERIALS {
@MATERIAL_01 {Mat1}
@MATERIAL_02 {Mat2}
@MATERIAL_02 {Mat3}
}
@AIRFOIL_SHAPE_NAME {AirfName}
@NUMBER_OF_CONTROL_POINTS {Ncp}
@IS_DEFINED_IN_FRAME {FrameName}
@MESH_DENSITY {md}
@COMMENTS {CommentText}
}
}

Notes

  • ShapeBuilder can generate beam cross-sections in the shape of a IH60 helicopter blade. To define a IH60 section, use the following parameters.
    1. @SHAPE_GROUP: AIRFOIL, and
    2. @SHAPE_TYPE: HIGH_LIFT_DEVICE.
  • The base section is a closed box supporting a portion of an airfoil, as illustrated in figs. 1, 2, and 3. No options are available for this shape.
  • The definition of the geometry of the cross-section relies on the concept of NURBS curves. Ncp control points will be used for the definition of these NURBS curves. (Default: Ncp = 2,048)
  • Optional dimensions @DIMENSION_13 and @DIMENSION_14 define two shaping parameters, denoted α and β, respectively, which are used to round the corners of the section. (Default value: α = β = 0.5).
  • Sectional shapes are defined in their own local coordinate system, which is assumed to coincide with the global coordinate system. If a fixed frame, FrameName, is specified, the local coordinate system coincides with this fixed frame.
  • The mesh density parameter, md, determines the level of mesh refinement. (Default: md = 4)
  • It is possible to attach comments to the definition of the object; these comments have no effect on its definition.

The high-lift device: base configuration

  • Fig.1 illustrates the base configuration of the high-lift device.
  • The geometric configuration of the high-lift device if defined by the dimensions listed in table 1, which are also indicated in figs. 1, 2, and 3. Dimensions labeled in red are required. Dimensions labeled in blue are optional and are assigned the default value indicated in table 1.
Component Dimension Symbol Default Nb.
Airfoil chord length c required 01
Airfoil location ηs required 02
Airfoil location η1 required 03
Airfoil location η2 required 04
Airfoil location ηe required 05
Flange thickness tfT required 06
Outer wrap thickness twO tfT 07
Inner wrap thickness twI tfT 08
Left web height hL required 09
Left web skew angle αL 90° 10
Right web height hR hL 11
Right web skew angle αR 90 ° 12
Table 1. Dimensions defining the geometry of the high-lift device.
  • Zone 1 of the high-lift device is defined as follows.
    • It comprises the following faces: FlangeFrontTop, FlangeMiddleTop, FlangeRearTop, TrailingEdgeTop, FlangeFrontBottom, FlangeMiddleBottom, FlangeRearBottom, and TrailingEdgeBottom.
    • It is associated with material Mat1 , which can refer to material properties or solid properties.
  • Zone 2 of the high-lift device is defined as follows.
    • It comprises the following faces: WrapTop, SideRearTop, SideRearBot, WrapBot, SideFrontBot, and SideFrontTop.
    • It is associated with material Mat2 , which can refer to material properties or solid properties.
Figure 1. The high-lift device
Figure 2. The high-lift device, left web detail
Figure 3. The high-lift device, leading edge detail