Laminardelle
Laminar cell of a symmetrical profile with different Reynolds numbers .
The laminardelle is a term used in fluid mechanics . It is a "dent" in the Lilienthal polar with particularly low flow resistance . It comprises a certain angle of attack or lift range within which the flow on the wing has a particularly long laminar path . The laminar dent is not an existing dent in the profile of the wing.
The laminar flow can reach far beyond half the wing chord. In the case of symmetrical profiles, the laminar hole is in the angle of attack of +/- a few degrees.
With curved profiles, the laminar cell can be moved to larger or smaller values. A laminar profile places high demands on the quality ( roughness ) of the surface and on manufacturing measures.
