期刊
JOURNAL OF HYDRAULIC RESEARCH
卷 50, 期 4, 页码 409-417出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00221686.2012.696558
关键词
Leakage; leak area; plastic pipes; visco-elasticity; water distribution systems
资金
- Fondazione Cassa Risparmio Perugia under the Project Leaks and blockages detection techniques for reducing energy and natural resources wastage
Traditional characterization of the leak head-discharge relationship in pipeline systems relies on the use of power law functions to explain the increase in leakage rate with pressure when network and laboratory data are analysed. However, recent studies addressed that the leak behaviour is complex and influenced by pipe material and leak geometry. The experimental tests, carried out at Water Engineering Laboratory of the University of Perugia (WEL), Italy, show that the leak head-discharge relationship on polyethylene pipes is not a bijective function since it gives rise to different discharge values with respect to one value of the pressure. To explore this issue, two viscoelastic models of a leak in a polyethylene pipe are introduced and compared with other leakage models. The results show that the viscoelastic behaviour reflects the leak head-discharge relationship, and care should be taken in the use of bijective relationships.
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