Numerical study on the characteristics of natural supercavitation by planar symmetric wedge-shaped cavitators for rotational supercavitating evaporator

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1007/s11431-015-5827-y

Ключевые слова: rotational supercavitating evaporator, desalination, planar symmetric wedge-shaped cavitators, CFD numerical simulation, Cavitation, Computational fluid dynamics, Evaporators, Numerical models, Turbulence models, Cavitation number, Cavitators, CFD numerical simulations, Computational domains, Empirical formulas, Performance optimizations, Supercavitating, Supercavitating flows, Numerical methods

Аннотация: With the application of supercavitation effect, a novel device named rotational supercavitating evaporator (RSCE) was recently designed for desalination. In order to improve the blade shape of rotational cavitator in RSCE for performance optimization and then design three-dimensional blades, numerical simulations are conducted on the supercavitating flows (with cavitation number ranging from 0.055 to 0.315) around two-dimensional planar symmetric wedge-shaped cavitators with different wedge angles varied from 10 to 180 degrees. Proper numerical method for simulating supercavitating flows around planar symmetric cavitator is established, and assessment of turbulence model in simulating cavitating flows is conducted. It shows that the size of computational domain would affect the simulation result. Empirical formulae for supercavity dimensions about cavitation number at different wedge angles are obtained, which are of significant importance in the subsequent design of three-dimensional blade. The characteristics of resistance at different wedge angles are discussed, which, together with the characteristics of supercavity dimensions, play important roles in the optimal design of RSCE.

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Издание

Журнал: SCIENCE CHINA-TECHNOLOGICAL SCIENCES

Выпуск журнала: Vol. 58, Is. 6

Номера страниц: 1072-1083

ISSN журнала: 16747321

Место издания: BEIJING

Издатель: SCIENCE PRESS

Авторы

  • Zheng Z. (School of Energy Science and Engineering, Harbin Institute of Technology)
  • Li F. (School of Energy Science and Engineering, Harbin Institute of Technology)
  • Li Q. (School of Energy Science and Engineering, Harbin Institute of Technology)
  • Kulagin V.A. (Department of Heat Technology and Fluid Dynamics, Siberian Federal University)

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