Skip to Main content Skip to Navigation
Conference papers

Experimental study of gas entrainment from surface swirl

Abstract : This work addresses the general topic of the gas entrainment from a free surface by a swirl issued from the pumping of fluids below the free surface. This phenomenon is investigated through an analytical experiment in water. A shear flow is generated between a horizontal flow and a stagnant flow. At the bottom of the test section, a vertical pumping is added to produce gas entrainment. One particularity of these experiments is the possibility to change the shape of the channel generating the inlet conditions by adding obstacles so as to trigger different conditions for the turbulent shear flow. Depending on the flow conditions, a surface swirl can be created with a sufficient strength to entrain gas below the free surface to the vertical pumping outlet. The frequency of gas entrainment occurrence is measured using visualizations of the flow. Two entrained regimes are identified for low and high Reynolds number flows the surface swirl induced gas entrainment in its core reaching the suction nozzle and bubbles issued from the breaking of the gas core are pumped.
Complete list of metadatas

Cited literature [8 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-02492547
Contributor : Amplexor Amplexor <>
Submitted on : Thursday, February 27, 2020 - 10:12:30 AM
Last modification on : Tuesday, April 28, 2020 - 11:28:17 AM
Long-term archiving on: : Thursday, May 28, 2020 - 1:12:29 PM

File

201500002145.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : cea-02492547, version 1

Collections

CEA | DEN

Citation

B. Moudjed, J. Excoffon, R. Riva, L. Rossi. Experimental study of gas entrainment from surface swirl. 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨cea-02492547⟩

Share

Metrics

Record views

53

Files downloads

122