Laser doppler anemometry in hydrodynamic testing |
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Authors: | Mirjana Puharic Slavica Ristic Marina Kutin Zivoslav Adamovic |
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Institution: | (1) Institut GOSA, Milana Rakića 35, Beograd, 11000, Serbia;(2) “Mihajlo Pupin” Technical Faculty, Zrenjanin, 23000, Serbia |
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Abstract: | Classical methods and the laser-Doppler-anemometry (LDA) application for the test section calibration of a water-cavitation
tunnel is presented. The results show that the LDA is the best method for calibration and the classical methods satisfy the
needs of standard tests. The advantages of the LDA are illustrated by determination of the pressure coefficient C
p
for a hydrofoil of a high-speed axial pump under the stationary and nonstationary conditions, as well. The velocity vector
distribution is measured around the central hydrofoil of a straight grid for angles of attack δ = 0° and 25° and undisturbed
velocity v
∞ = 5.32 m/s. The results of the LDA measurements are used as a basis for the definition of the boundary conditions for numerical
flow simulation and C
p
calculation by the Fluent program. A flow visualization is made by aniline dyes and air bubbles. |
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Keywords: | water-cavitation tunnel pressure measurement Pitot tube laser Doppler anemometry straight profile grid numerical simulation pressure coefficient flow visualization |
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