Study on Jet and Mixing Characteristics of a Two-Stage Vacuum Ejector for Desalination
Author:
Affiliation:

Funding:

National Natural Science Foundation of China (51706049), Youth Innovation Promotion Association CAS (2017412)

Ethical statement:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
    Abstract:

    Ejector is an important device to improve the efficiency of thermal seawater desalination system. In this work, the internal flow and transport characteristics of a two-stage ejector are investigated via a three-dimensional numerical simulation. The mixing and diffusion processes of ejecting and working fluids are also analyzed to identify the factors related to energy consumption. The simulation results showed that, the maximum velocity of the ejector occurs in the axis direction and the streamline distribution in the nozzle and mixing chamber is uniform. However, one or multiple vortices are generated in the suction chamber, which causes the uneven distribution of streamline. The negative pressure at the entrance of the suction chamber increases firstly, and then decreases with the increasing velocity. The amount of vortex decreases with increasing velocity, which helps to improve the efficiency of ejector. Vortex dissipates faster with increased distance from the central line and the turbulent dissipation increases significantly, which results in a rapid dissipation of vortex.

    Reference
    Related
    Cited by
Get Citation

SU Chuangjian, ZHANG Fengming, CHEN Shunquan, MO Ming, WU Tong. Study on Jet and Mixing Characteristics of a Two-Stage Vacuum Ejector for Desalination[J]. Journal of Integration Technology,2021,10(2):39-49

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
History
  • Received:
  • Revised:
  • Adopted:
  • Online: March 24,2021
  • Published: