Measurements of wall-pressure fluctuations on a cylinder in annular water flow with upstream disturbances. Part 1: No flow spoilers

Data for surface pressures on a finite length rod in an annular region are presented as a function of distance along the rod and compared with existing data for well developed flow. Normalizations of the power spectral densities for different flow rates and three hydraulic diameters are considered, and the possible spurious effects of flow noise, entrance conditions, and transducer size effects are discussed. Surface pressure power spectral density levels are identified.