Downloads & Free Reading Options - Results

An existing constant-temperature hot-wire anemometer system that enabled broadband-turbulence quantities to be determined using a hybrid analog/digital measurement technique has been modified so that turbulence quantities can now be determined using a purely digital technique. With the new system, higher-degree turbulence terms, such as u3, V3, w3, u2v, uv2, u4, v4 and w4, can now be obtained. These terms are used to calculate turbulent-kinetic-energy and Reynolds-shear-stress balances, and skewness and flatness factors, that could not be calculated previously. In this report the new equipment is described and the procedures and computer programs used to take measurements and process the data are detailed.