Conference proceeding
Hydrodynamic Forces on Intermittently Spanning Pipelines in Steady Currents
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, Vol.1: Offshore Technology; Offshore Geotechnics
ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, Glasgow, Scotland, UK, Jun. 09 - 14, 2019, Code 154931 (Glasgow, 09/06/2019 - 14/06/2019)
11/11/2019
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Abstract
Experimental investigations on the hydrodynamic forces on an intermittently spanning pipeline exposed to steady currents were carried out. The effect of intermittent local spanning sections on the global hydrodynamic behavior was studied by changing the ratio between the non-spanning length (B) and the total length (L), namely the blocking ratio B / L. A range of gap height (G) to diameter (D) ratios, i.e. gap ratio G / D, and 4 different Reynolds numbers (Re) in the subcritical region were tested in the experiments. The results show: i) for a certain gap ratio, the mean drag increases gently with the decreasing blocking ratio at Re = 5.5 × 104, whereas the mean lift decreases significantly with the decreasing blocking ratio at all values of Re tested; and ii) for a certain blocking ratio, increasing the gap ratio leads to an increase in mean drag and decrease in mean lift. Further, simple approaches are proposed based on the present dataset for estimating the global effects on hydrodynamic drag and lift forces due to local spanning geometry.
Details
- Title
- Hydrodynamic Forces on Intermittently Spanning Pipelines in Steady Currents
- Creators
- Yunfei Teng - Dalian University of TechnologyLiang Cheng - Dalian University of TechnologyHongwei An - University of Western AustraliaFeifei Tong - University of Western AustraliaTerry Griffiths - University of Western AustraliaWei Sun - University of Western AustraliaJiawei Chi - University of Western AustraliaZhijian Xiong - University of Western Australia
- Publication Details
- Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, Vol.1: Offshore Technology; Offshore Geotechnics
- Conference
- ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, Glasgow, Scotland, UK, Jun. 09 - 14, 2019, Code 154931 (Glasgow, 09/06/2019 - 14/06/2019)
- Publisher
- American Society of Mechanical Engineers; United States
- Identifiers
- 991013042412702368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Conference proceeding