Flow Characteristics Analysis of Load Rejection Transition Process in Pumped Storage Unit Based on Cavitation Model
- سال انتشار: 1403
- محل انتشار: دوماهنامه مکانیک سیالات کاربردی، دوره: 17، شماره: 9
- کد COI اختصاصی: JR_JAFM-17-9_016
- زبان مقاله: انگلیسی
- تعداد مشاهده: 188
نویسندگان
School of Energy and Power Engineering, Lanzhou University of Technology ۱, Lanzhou, Gansu, ۷۳۰۰۵۰, China
School of Energy and Power Engineering, Lanzhou University of Technology ۱, Lanzhou, Gansu, ۷۳۰۰۵۰, China
School of Energy and Power Engineering, Lanzhou University of Technology ۱, Lanzhou, Gansu, ۷۳۰۰۵۰, China
Tianjin Key Laboratory of Hydroelectric Power Generating Equipment ۳, Tianjin, ۳۰۰۰۰۰, China
چکیده
Concerning dual-carbon applications, establishing a new energy-dominated power system to achieve carbon peaking and carbon neutrality objectives is imperative. Pumped storage units excel in this context, owing to their unique advantages. During the load-shedding process of the pump turbine, the intricate flow patterns and cavitation phenomena substantially influence the flow field. This study introduces a cavitation model to perform numerical simulations of load rejection processes in pumped storage power plants, aiming to thoroughly investigate the impact of cavitation phenomena on the units. The results indicate that as the rotational speed increases, the dynamic and static interference within the no-blade region becomes notable, resulting in pressure pulsations within the guide vane region and exacerbating structural deformation and fatigue failures. Moreover, deviations from the designated operational point disrupt the symmetry of the flow field, leading to irregular changes in radial forces. Accounting for the mass disturbance and changes in wave velocity attributable to a cavitation phase transition, pressure fluctuation amplitude increases within the draft tube, consequently engendering complex flow phenomena. These findings offer indispensable guidance for the optimal design and safe operation of pump turbines within new power systems.کلیدواژه ها
Pump turbine, Cavitation, Load Rejection Transition Process, Flow characteristics, Three-Dimensional Numerical Simulationاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.