The influence of surface roughness on the hydrodynamics of the falling water film in cooling towers

• Autorzy: Kuzmenko Igor , Gourjii Alexandre
• Języki publikacji: EN

Abstrakty

EN

This paper sets out the results of experiments for falling filmat Rew = 70 . . . 340 in the vertical channel of two coaxialtubes, ∅37/17 mm, 1 m high, for a counter current air flow with Reair = 2200 . . . 10⁴. Subject to investigation was falling film on smooth and capillary-porous wall surfaces at constant film thickness greater than the height of the capillary-porous coating (0.3 mm). It was established that film thickness is weakly dependent on the velocity of the counter current airflow at wair = 1.7. . . 7.3 m/s. The water concentration on a smooth surface is 2 times higher at the same film thickness. The results of flooding in a channel with a smooth wall surface confirm the validity of the Wallis equation with deviation up to 20%.

Słowa kluczowe

EN

falling film; countercurrent flow; capillary-porous wall surface; film thickness

PL

spływ filmowy; przepływ przeciwprądowy; kapilarno-porowate powierzchnie ścian; grubość powłoki

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2020
• Tom: Vol. 100, nr 2
• Strony: 152--160
• Opis fizyczny: Bibliogr. 18 poz., rys., wykr.

Twórcy

autor

Kuzmenko Igor

• Igor Sikorsky Kyiv Polytechnic Institute, Kyiv, Ukraine

autor

Gourjii Alexandre

• Igor Sikorsky Kyiv Polytechnic Institute, Kyiv, Ukraine

Bibliografia

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• 14. Zhao, Y., Markides, C. N., Matar, O. K., and Hewitt, G.F. (2013) Disturbance wave developmen in two-phase gas-liquid upwards vertical annul arflow. International Journal of Multiphase Flow, 55, 111-129.
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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).