바이크 세차기 노즐의 물 공급 압력과 각도에 따른 세척 효율 분석

다국어 초록 (Multilingual Abstract)

In this paper, internal and external flow analysis of nozzle for a automatic bike washing machine was performed using Ansys Fluent, by varying nozzle injection pressure and angle. The pressure and velocity distributions generated at the nozzle outlet from internal flow analysis were applied for inlet condition of the external flow analysis of the nozzle. As a criterion for the cleaning efficiency, the shear stress condition provided by EHEDG[5] was used and an area of shear stress of 3 Pa or more according to the spray angle and pressure was compared. It is expected that the results of this paper will be applied to the development of automatic contactless bike washing nozzle.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 수치모델링
• 2.1 지배방정식
• 2.2 난류모델
• 3. 다상유동기법
• 3.1 Volume of Fluid(VOF)
• 3.2 Eulerian
• 3.3 Lagrangian
• 4. 유동 수치 해석
• 4.1 해석 모델
• 4.2 수치해석
• 4.3 수치해석 결과
• 5. 결론
• References

참고문헌 (Reference)

1 곽청렬, "워터젯 노즐의 길이와 내부 나선 구조 유무에 따른 유체거동에 관한 전산해석" 한국기계가공학회 16 (16): 118-123, 2017

2 김양균, "물 분무 소화설비 성능검토를 위한 수치해석 연구" 한국자원공학회 54 (54): 611-618, 2017

3 전민경, "노즐 출구에서 외부 유체 조건에 따른 유동의 가시화 특성" 한국기계기술학회 18 (18): 165-170, 2016

4 이상열, "고압 세척기의 분사 노즐에 관한 연구" 한국기계기술학회 17 (17): 559-564, 2015

5 B. L. Park, "Numerical study on multiphase flow in a spray nozzle of a touchless waterjet-type car wash system using Eulerian-Lagrangian method" University of Ulsan 2016

6 M. Y. Han, "Development of Flotation Process using Charged bubble to Remedy Contaminated soil" 2008 : 281-282, 2008

7 B. B. Jensen, "Critical wall shear stress for the EHEDG test method" 43 (43): 831-840, 2004