On the effects of a periodic, spanwise variation of suction upon asymptotic suction flow

✍ Scribed by Kelly, R. E.

• Publisher: Springer
• Year: 1968
• Tongue: English
• Weight: 865 KB
• Volume: 19
• Category: Article
• ISSN: 0003-6994
• DOI: 10.1007/bf00383910

✦ Synopsis

The effects of superposing streamwise vorficity, periodic in the lateral direction, upon two-dimensional asymptotic suction flow are analyzed. Such vorfieity, generated by prescribing a spanwise variation in the suction velocity, is known to play an important role in unstable and turbulent boundary layers. The flow induced by the variation has been obtained for a freestream velocity which (i) is steady, (ii) oscillates periodically in time, (iii) changes impulsively from rest. For the oscillatory case it is shown that a frequency can exist which maximizes the induced, unsteady wall shear stress for a given spanwise period. For steady flow the heat transfer to, or from a wall at constant temperature has also been computed.

Nomenclature

(x, y, z) (u, v, w)