Drag due to grooves in a flat plate with a turbulent boundary layer, at subsonic and supersonic speeds
ESDU 75028 gives curves, derived from a correlation of experimental data, that enable the drag increment to be predicted due to a groove of planform aspect ratio greater than 8 normal to the flow. For grooves inclined at angles to the flow exceeding 60 degrees the data for the grooves normal to the flow apply, while for grooves inclined between 0 degrees (parallel to the flow) and 60 degrees a method for obtaining the maximum increment is suggested based on the use of ESDU 75031 to predict the increments due to the forward- and rearward- facing steps together with an appropriate skin friction allowance.
An accompanying Toolbox app is provided that implements the method using ESDUpac A7528.
|Data Item ESDU 75028|
|Toolbox 75028 Run||
|Toolbox ISA Run||
|Toolbox CFM Run||
Updated in this Release
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