کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6760005 511697 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical investigation on cavitation within letdown orifice of PWR nuclear power plant
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Numerical investigation on cavitation within letdown orifice of PWR nuclear power plant
چکیده انگلیسی
The present study numerically investigates the influence of three parameters (including outlet pressure, the circular bead of orifice inlet and the shape change of orifice outlet induced by cavitation erosion) on the cavitation characteristics within letdown orifice of pressurized water reactor (PWR) nuclear power plant. In order to understand the determinants of cavitation within letdown orifice, the influences of the mentioned parameters on cavitation characteristics are revealed. Correspondingly, the formation and variation of low pressure zones are analysed. Meanwhile, areas with high risk of cavitation erosion are displayed and confirmed through the examination in nuclear power plant. From the above, it can be concluded: Cavitation would not occur within letdown orifice unless the outlet pressure decreases to a certain value when inlet pressure remains unchanged; once cavitation has been formed within letdown orifice, the degree of cavitation would increase with the decrease of outlet pressure. The variation of circular bead could change both the location and the degree of cavitation. The shape change of orifice outlet induced by cavitation erosion would enhance the degree of subsequent cavitation around the discharge end of letdown orifice; in addition, this effect would be strengthened with the increase of shape change.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Design - Volume 305, 15 August 2016, Pages 230-245
نویسندگان
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