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Choked flow in water/CO2 solutions on air-independent propulsion systems


We develop a simplified model of choked flow in pipes for CO2-water solutions as an important step in the modelling of a whole hydraulic system with the intention of eliminating the carbon dioxide generated in air-independent submarine propulsion. The model is based on an approximate fitting of the homogeneous isentropic solution upstream of a valve (or any other area restriction), for given fluid conditions at the entrance. The relative maximum choking back-pressure is computed as a function of area restriction ratio. Although the procedure is generic for gas solutions, numeric values for the non-dimensional parameters in the analysis are developed only for choking in the case of carbon dioxide solutions up to the pure-water limit.

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Correspondence to Isidoro Martínez.

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Martínez, I., Casas, P.A. Choked flow in water/CO2 solutions on air-independent propulsion systems. J Mar Sci Technol 17, 542–548 (2012).

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  • Choked flow
  • Flashing
  • Cavitation
  • Carbon dioxide water solutions
  • Two phase flow