Takuya Kawata

1506 Experimental investigation on effect of form of a static pressure probe on simultaneous measurement of fluctuating velocity and pressure

Effect of the form of a miniature static pressure probe on simultaneous measurements of fluctuating velocity and pressure with hot-wire probes is experimentally investigated. Ten probes with different probe diameters and lengths are tested for their fundamental performance, e.g. the frequency response and the optimal distance between a pressure probe and a hot-wire probe in velocity-pressure measurements. The frequency response depends mainly on the probe diameter and the length from the pressure holes to the sensor and slightly on the length from the tip to the pressure holes, L1, when the probe diameter is large. The optimal probe distance in combination with hot-wire probes is investigated in a turbulent wake of circular cylinder, and it is found to depend on the probe diameter but not on L1. However, the significant effect of L1 is observed in measured distributions of the correlation between the transverse-wise velocity and the static pressure.