Understanding Type and Grid: An Improved Approach to Airfoil Meshing

The art of airfoil meshing has evolved significantly over the years, with various gridding strategies being employed to capture the subtle physics involved. Among these approaches, the H-type pattern is a well-established method that has been widely used in the aerospace and turbomachinery fields. However, this traditional approach falls short of accurately capturing the leading edge curvature, particularly when dealing with curved leading edges.

To overcome this limitation, the C-TypeĪn improved variant of H-type topology was developed, which captures the leading edge curvature without any singularities. This pattern is simple to construct and holds good for biconvex airfoils with sharp leading and trailing edges. However, it still propagates the boundary layer in the transverse direction, as seen in Figure 4.

Another approach is to split the singularity into two weaker singularities, as shown in Figure 3b. This can alleviate some of the issues associated with the H-type pattern. Nonetheless, when applied to an airfoil with a curved leading edge, the H-pattern creates a singular point (Figure 3a).

The C-Type pattern also has its limitations, particularly in regions where the flow accelerates. High clustered cells both parallel and perpendicular can result in significant time step reductions due to CFL conditions, leading to slowing of solver convergence.

In recent years, newer and more efficient strategies have been developed to capture the subtle physics involved in airfoil meshing. These improved blocking techniques involve splitting the singularity into two weaker singularities, as seen in Figure 3b. This approach has shown promising results in capturing the leading edge curvature accurately.

In conclusion, the traditional H-type pattern is a well-established method for airfoil meshing, but it falls short of accurately capturing the leading edge curvature. The C-TypeĪn improved variant offers an alternative solution, but it still propagates the boundary layer in the transverse direction. Newer and more efficient strategies are being developed to capture the subtle physics involved in airfoil meshing.

Figure 1: Blocking strategy to capture physics around an airfoil

The ASP.NET Core Grid Component provides several options for customizing editors using params, including:

* NumericTextBox component for integers, double, and decimal data types

* DropDownlist component to show all unique values related to that field

* CheckBox component for boolean data type

* DateTimePicker component for date time data type

These editor components can be customized through the edit property of e-grid-column tag helper. The editType property is used to define the editor component for any particular column, based on the data type of the column.

Figure 2: H-type pattern for a bi-convex airfoil

Figure 3a: H-type pattern for a curved leading edge airfoil, 3b – H-type pattern with a leading-edge split

Figure 4: H-type pattern with boundary layer clustering around an airfoil

Type and grid