二次元噴流における圧力および歪速度の同時計測

抄録

Through the simultaneous measurement of the pressure and strain-velocity, the role of Pressure-Strain Correlation, which appears in Reynolds stress transport equation, is investigated in a turbulent planar jet. We use a constant-temperature hot-wire anemometry system and a miniature pressure probe for velocity measurement and fluctuating pressure measurement, respectively. Two types of the combined probe are introduced for acquiring the Pressure-Strain Correlation. One consists of a X-type hot-wire probe and a pressure probe and the other consists of two I-type hot-wire probes arranged in vertical direction and a pressure probe. The measurements were well-performed in the present planar jet expect for the location where the mean streamwise velocity is small. The acquired signal and the result of the cross-wavelet analysis show the intermittency of the Reynolds stress and the Pressure-Strain Correlation, which indicate that the Reynolds stress transport phenomena occurs locally in space and time in a turbulent planar jet.