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공기의 자가흡입에 의해 마이크로버블을 발생시키는 보텍스 노즐에 대한 실험적 연구An experimental study on the Vortex nozzle for generating micro-bubble by air self-suction

Other Titles
An experimental study on the Vortex nozzle for generating micro-bubble by air self-suction
Authors
곽구태박상희김창수유상열
Issue Date
2015
Publisher
한국기계가공학회
Keywords
Micro-bubble(마이크로버블); Vortex nozzle(보텍스 노즐); Self-suction(자가흡입); Nozzle shape(노즐형상); Oxygen dissolved(용존산소량)
Citation
한국기계가공학회지, v.14, no.1, pp.98 - 104
Journal Title
한국기계가공학회지
Volume
14
Number
1
Start Page
98
End Page
104
URI
https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/20122
DOI
10.14775/ksmpe.2015.14.1.098
ISSN
1598-6721
Abstract
This experiment was a study of a Vortex nozzle designed to produce micro-bubbles due To investigate air self-suction and the generation of micro-bubble by the Vortex nozzle, the dimensions of air intake region, the nozzle shape, and the nozzle exit diameter (dn=5,7,9.2,12.3mm)werevaried. The air self-suction rate was ~1,000 to 2,000 cc/min at the orifice nozzle (7 mm), and ~100 and ~22 cc/min at the sector nozzles (9.2 and 12.3 mm, respectively). The most bubbles were detected in the orifice nozzle, but bubbles less than 50 μm were found in the 12.3-mm sector nozzle. The dissolved oxygen in the tank water was much greater in Case 2 than in Case 1, at both the orifice and sector nozzles. Moreover, the reduction rate of dissolved oxygen was found to be less at the sector nozzles, than at the orifice nozzle.
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