Cone angles and Reynolds stresses in an adverse pressure gradient boundary layer

This is a publisher's version of a paper from 11th Australasian Fluid Mechanics Conference 1992 published by AFMC. This version is reproduced with the permission of AFMC.A comparison of the Reynolds stresses measured with a stationary and flying hot-wire is made for flow in a turbulent boundary layer on a smooth wall with streamwise pressure gradient. A cone angle is defined, based on the p.d.f. of velocity vector angles for 90o X-wire. From these measurements it is possible to evaluate the conditions under which a stationary X-wire will give erroneous estimates of the Reynolds stresses in fields of strong turbulence intensities. The response of the Reynolds stresses to the application of an adverse pressure gradient is discussed.14-18 December, 199