Structure modification and numerical study of the moisture-separation performance of special crossunder pipe separators for nuclear power steam turbines

다국어 초록 (Multilingual Abstract)

The present paper investigated the enhancement of moisture-separation efficiency for ordinary special crossunder pipe separators(SCRUPSs) and proposed three structure-modified separators (combined separator, Z-shaped SCRUPSs, and spiral-type SCRUPSs).

Deposition mechanisms for droplets with different sizes were considered using commercial CFD flow solver. Results show that threestructuremodified separators can increase droplet deposition rate to varying degrees. Regarding flow losses, spiral-type SCRUPSs causethe highest increase, with a total pressure loss coefficient of 231%, although it has the best deposition rate improvement. Among the threestructure-modified separators, "Z" shape separator has the best separation performance because of its higher moisture-separation efficiencyand lower total pressure loss efficiency. Results could provide theoretical basis for research on and development of this new typeof moisture separator.

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