REYNOLDS STRESS, MEAN VELOCITY, AND DYNAMIC STATIC PRESSURE MEASUREMENT BY A 4-HOLE PRESSURE PROBE

An improved version of the four-hole directional pressure probe, or Co bra probe, is described, in which the frequency response has been exte nded to 1.5 kHz. The probe measures all three orthogonal mean and turb ulent velocity components at a point in the flow field. The probe also resolves the local mean and turbulent components of static pressure, allowing moments between the fluctuating velocity components and press ure to be determined. The techniques developed to allow the improved f requency response and the use of the probe in turbulent, developed pip e flow (a calibration flow) are described. Also given are the turbulen t pressure-velocity correlations, which show a high degree of anticorr elation for one velocity component. (C) Elsevier Science Inc., 1997.