The flow about a slender propeller-driven body in a temperature stratified fluid

An experimental study of the turbulent wake produced by a stern propellor-driven body moving in a temperature stratified fluid is presented. The velocity and thermal boundary layers on the body upstream of the propellor are also examined. Mean flow velocities, static pressure, flow angularity, and mean temperature distributions are reported at five down-stream stations, Z/O = 0.33, 1.0, 2.0, 3.0, and 4.0. Turbulence data, including temperature fluctuations are reported at Z/D = 0.33 and Z/D = 4.0. The measurements were taken using thermocouples and pitot tubes of various size, a yawhead probe, a cross-wire hot-wire, and a straight-wire hot-wire as appropriate. For measuring the temperature fluctuations, the straight hot-wire probe was operated in the low overheat mode to maximize temperature sensitivity.