کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4925410 1431401 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation on the unsteady characteristics of reactor coolant pumps with non-uniform inflow
ترجمه فارسی عنوان
بررسی عددی در خصوص ویژگی های ناپایدار پمپ های خنک کننده راکتور با جریان غیر یکنواخت
کلمات کلیدی
پمپ های خنک کننده راکتور ضربان قلب، جریان غیر یکنواخت، پیش بینی عددی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
The pumps are generally designed and are selected based on performance under uniform inflow with the straight pipe, but actually non-uniform suction flow occurs at the inlet of the reactor coolant pump due to the complex geometry in the channel head. It is sorely necessary to research the unsteady characteristics of the pumps with uniform and non-uniform inflow. In this paper, CFD approach is employed to analyse the inlet and outlet pressure pulsation characteristics of reactor coolant pumps with different inflows. The channel head induces non-uniform flow in the pump inlet, while straight pipe is with the uniform inlet flow. Meanwhile, the pressure pulsations at positions of the inlet and outlet with different inflows are investigated. And pressure pulsation signals are analysed using FFT, RMS and Peak-to-Peak Value methods. The differences of the pressure pulsation and its characteristic between the channel head and straight pipe at the inlet and outlet are obvious due to the different inflows of channel head and straight pipe. The pressure amplitudes of fR, fRPF, 2fRPF, 3fRPF, 4fRPF, 2fSPF are analysed, and the predominant components of the inlet and outlet in pressure spectra locate at 2fRPF. Further, the non-uniform inflow leads to the offset of the X radial force and the Y radial force, which leads to the increasing of the asymmetric degrees of radial force. The non-uniform inflow increases the radial force at low frequency. In a word, it is expected that the present work provides a different view of designing pumps with the consideration of non-uniform inflow. It is very important to accurately evaluate the hydrodynamic characteristics with non-uniform inflow because of the safety of the nuclear reactor. In further study, experimental investigation on the pressure pulsations of the reactor coolant pump with channel head and straight pipe will be conducted and flow field of the inlet will be measured by PIV as well.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 320, 15 August 2017, Pages 65-76
نویسندگان
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