... and Loewen, 2007; Blenkinsopp and Chaplin, 2010). Local air-volume (void) fraction can be estimated by detecting the phase variation at the probe tip. The fiber-optic probe is characterized by its very fine structure, which minimizes the disturbances of a device to a physical field. In the conventional two...

..., there is a large increase in drag. Reviews of the research conducted in last years on the problem of synchronization of an oscillating obstacle with its wake were published by Parkinson (1974), Sarpkaya (1979), Bearman(1984) and Griffin and Hall (1991). These works showed that large phase variations between...