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Cylindrical five-holes probe
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Variants of the previous instrument are a cylinder with hemispherical head (Figure 2.29), a truncated pyramid (Figure 2.30) or a truncated cone. The advantage of these probes compared to the spherical probe is the elimination of separation.
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These probes measure the angles of pitch and yaw of the stream, the stagnation and the dynamic pressure; therefore provide sufficient data to fully calculate the fields of velocity and pressure. The maximum measurable angle is about 60°.
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Figure 2.30
