지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.3
- 수록면
- 30 - 44 (15page)
이용수
초록· 키워드
오류제보하기
The high speed flow leaked from cracks in gas pipelines can lead to severe explosion accidents. Therefore, detecting the location of leakage flow early and precisely is important to reduce the damage from leakage flow. The three-dimensional probe array using the acoustic intensity signals is one of the useful leak detection technologies. In this study, the CFD/CAA hybrid method is used to investigate the flow and acoustic characteristics of leakage flow. The features of leakage flow, including turbulence scales, roll-up phenomenon, strong shock waves, and Mach disk are predicted through the large eddy simulation (LES), and the far-field noise is calculated using the Ffowcs Williams-Hawkings (FW-H) acoustic analogy with permeable surfaces. The parametric study is performed in terms of the internal pressure condition in the pipe (10, 30, 50, 100 bar) and the size of leakage hole (5, 8, 10 mm) to analyze the flow and acoustics characteristics of the leakage flow. The strong Mack disk expands widely as the internal pressure and hole size increase while screech tone noise at specific frequency is observed as the internal pressure and hole size decrease. It turns out that overall sound pressure level (OASPL) of leakage flow increases about 15 dB when screech tone noise occurs.
목차
ABSTRACT
1. 서론
2. 전산 해석 기법
3. 전산해석 모델 및 유동 조건
4. 전산해석 결과
5. 결론
References
참고문헌 (25)
참고문헌 신청
2018, Qiu, Z. and Liang, W., “Tracing and prediction analysis of an urban pipeline leakage accident based on the catastrophe DBN mode,” Journal of Natural Gas Science and Engineering, Vol.57, pp.339-348.
2010, Park, K.J., Kang, W.S. and Kang, D.J., “Flaw Detection of Petrochemical Pipes using Torsional Waves,” Journal of Power System Engineering, Vol.14, No.3, pp.46-51.
2015, Lee, S.G. and Song, S.J., “Eddy Current Sensor Development for Offshore Pipeline NDT Inspection,” Journal of Ocean Engineering and Technology, Vol.29, No.2, pp.199-206.
2019, Chung, W.G., Kim, J.H. and Cheon, K.Y., “Flaw Detection of 3/4 inch Pipe by Using Guided Wave,” Transactions of the Korean Society of Pressure Vessels and Piping, Vol.15, No.1, pp.40-45.
2023, Shin, C.M., Ryu, S.H., Jung, K.J. and Myong, R.S., “Computational Analysis of Thermal Flow Field and Observability of Aircraft serrated Nozzles,” Journal of Computational Fluids Engineering, Vol.28, No.1, pp.1-11.
2010, Park, K.J., Kang, W.S. and Kang, D.J., “Flaw Detection of Petrochemical Pipes using Torsional Waves,” Journal of Power System Engineering, Vol.14, No.3, pp.46-51.
2015, Lee, S.G. and Song, S.J., “Eddy Current Sensor Development for Offshore Pipeline NDT Inspection,” Journal of Ocean Engineering and Technology, Vol.29, No.2, pp.199-206.
2019, Chung, W.G., Kim, J.H. and Cheon, K.Y., “Flaw Detection of 3/4 inch Pipe by Using Guided Wave,” Transactions of the Korean Society of Pressure Vessels and Piping, Vol.15, No.1, pp.40-45.
2023, Shin, C.M., Ryu, S.H., Jung, K.J. and Myong, R.S., “Computational Analysis of Thermal Flow Field and Observability of Aircraft serrated Nozzles,” Journal of Computational Fluids Engineering, Vol.28, No.1, pp.1-11.
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