The drag of bluff bodies immersed in a turbulent boundary layer.

Reports wind measurements made on a multi-storey building. Gives contours of overall pressure coefficients and wind velocity profiles. Compares results with series of wind-tunnel model tests and finds full-scale measurements were quite different from model tests. In an attempt to gain greater physical insight into the problem tests were made on a two-dimensional bluffplate immersed in a turbulent boundary layer. Finds correlation of drag coefficient with boundary layer parameters for quasi-equilibrium type layers. Finds logarithmic wall similarity law for drag and a drag defect law of behaviour. Also reports preliminary experiments on a three-dimensional bluff plate in a turbulent boundary layer.