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VELOCITY-PRESSURE CORRELATION MEASUREMENT USING VARIOUS STATIC-PRESSURE PROBES IN A WAKE OF A CIRCULAR CYLINDER

Takuya Kawata
Graduate School of Science and Technology, Keio University, 3-14-1, Kohoku-ku, Hiyoshi, 223-8522 Yokohama, Japan; Department of Mechanical Engineering, Tokyo University of Science Yamazaki 2641 Noda, Chiba 278-8510, Japan

Yoshitsugu Naka
Department of Mechanical and Aerospace Engineering Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan

Koji Fukagata
Department of Mechanical Engineering, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522,Japan

Shinnosuke Obi
Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan

Аннотация

In the present study, an experimental investigation is conducted into the effect of the shape of a miniature static-pressure probe on the velocity-pressure correlation measurement. Ten static-pressure probes, with systematically-changed probe diameters and lengths, are compared in combination with an X-type hot-wire probe to examine the accuracy of the simultaneous measurement of the fluctuating velocity and pressure. The effect of the probe shape on the distance between the probes, which is necessary to avoid interference, is also investigated for the various pressure probes, and it is found that the change in probe diameter has the primary influence on the probe interference. In the velocity-pressure correlation measurements, the results of the pressure fluctuation p' and the velocity-pressure correlation up are not affected by the probe shape. On the other hand, it is indicated that the measurement of vp is extremely sensitive to the configuration of the pressure holes including its orientation.