Boundary Layer Calculations

Abstract

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One hundred years of aeronautics in East London

“…This response appears to have caused Piercy and Whitehead to revisit their earlier laminar boundary-layer calculation method (99) . This resulted in two further reports (133,134) which appeared in May and July 1943. The first (133) describes a revised calculation method and this, as we shall see, was published after the War.…”

“…This resulted in two further reports (133,134) which appeared in May and July 1943. The first (133) describes a revised calculation method and this, as we shall see, was published after the War. However, the report goes on to apply the method to aerofoils, investigating various forms of boundary-layer acceleration over the aerofoil's forward part, retardation beyond the minimum pressure point on the assumption that this might provide a qualitative indication of the gross behaviour of retarded turbulent flow, and finally the effects of surface waviness.…”

“…Work on the Piercy aerofoils also progressed at Cambridge and now, it appears, with the definite intention of exploiting their laminar-flow characteristics. Regrettably none of this work appeared in the open literature although four papers describing it were submitted to the ARC (130,131,133,134) . The first two reports (130,131) , dated December 1941, deal .…”

“…The results of this method, and a combination of it with that of von Kármán-Pohlhausen, show remarkable accuracy. In 1949 Piercy and Whitehead (135) finally published the work which Piercy had stated as with generalisations of the earlier methods of aerofoil design (107)(108)(109) which now allow a far greater degree of sophistication to be achieved; some of the features described appeared in post-war editions of Ref. 93.…”