Velocity vector cone angle in turbulent flows |
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| Authors: | L. W. B. Browne R. A. Antonia L. P. Chua |
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| Affiliation: | (1) Department of Mechanical Engineering, University of Newcastle, 2308 N.S.W., Australia |
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| Abstract: | Use is made of computer simulated turbulent signals to calculate the rms of the velocity cone angle. The calculation compares favourably with X-probe data close to the axis of a circular jet. In this flow, the vector cone angle can exceed 90°, even on the axis. As a consequence, the rms values of the cone angle and of the lateral velocity fluctuation can be seriously underestimated with a 90° X-probe. Support for this is provided by measurements with a 120° X-probe. |
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