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The effect of vortex on head loss and pressure fluctuation along the Penstock of Hydroelectric power plant | ||
| فناوری های پیشرفته در بهره وری آب | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 01 دی 1404 | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22126/atwe.2025.12912.1192 | ||
| نویسندگان | ||
| رسول قبادیان* 1؛ Reza Roshan2 | ||
| 1گروه مهندسی آب، دانشکده کشاورزی، دانشگاه رازی، کرمانشاه، ایران | ||
| 2PhD hydraulic straucture, Department of Water Engineering, Razi University, Kermanshah, Iran | ||
| چکیده | ||
| Vortex formation at hydropower plant intakes is a common hydraulic issue that leads to swirling flow, air entrainment, energy loss, and reduced discharge capacity. A practical solution is the use of horizontal perforated anti-vortex plates. In this research, a large-scale laboratory model was employed to study the effects of vortex on relative total head loss (ΔH/H), relative friction head loss (hf/L), friction coefficient (f), and pressure fluctuations along the penstock. Experiments were conducted for five relative submergence depths (S/D = 1.5–3) and four Froude numbers (Fr = 0.6–1.2), with pressure measured at nine sections. The results indicate that anti-vortex plates significantly reduce f, ΔH/H, and hf/L to 19.2%, 44.4%, and 20.8% of the values without plates. Increasing the submergence depth doubles hf/L (by about 64%) while decreasing f from 0.013 to 0.009. For a fixed S/D, higher Froude numbers and stronger vortices increase ΔH/H, hf/L, and pressure fluctuations, though f decreases. It was also observed that weak vortices (class C) disappear within about 7D of tunnel length, class B within 18D, while strong class A vortices with air cores persist and require much longer tunnels to dissipat | ||
| کلیدواژهها | ||
| Physical model؛ Vortex؛ Pressure fluctuations؛ anti-vortex plate؛ penstock | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 5 |
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