WIT Press


Measurements And CFX-simulations Of A Bubbly Flow In A Vertical Pipe

Price

Free (open access)

Paper DOI

10.2495/AFM000021

Volume

29

Pages

9

Published

2000

Size

909 kb

Author(s)

E. Krepper & H-M. Prasser

Abstract

In the Forschungszentrum Rossendorf a measurement techniques test loop was constructed. Air was injected into an upward vertical water flow at normal con- ditions applying different injection modes. The annular test section had a diameter of about 50 mm and a length of about 4 m. The air water flow was investigated us- ing different two phase flow measuring techniques. Different tests with different relations of air and water superficial velocity were performed. For each test sta- tionary conditions were settled. Applying a wire mesh sensor, developed in FZR, the cross section of the void fraction could be determined. The time resolution achieved by the signal process- ing unit is 1024 frames per second. The spatial resolution equals 3 mm. At the in- vestigated flow velocities, the bubble diameter distributio

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