کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8948755 1645682 2018 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of cavity length pulsation characteristics of jet pumps during limited operation stage
ترجمه فارسی عنوان
بررسی تجربی خصوصیات پالس های طول حفره ای پمپ های جت در مرحله عملیاتی محدود
کلمات کلیدی
پمپ جت، طول حفره، ویژگی های جریان، کاویتاسیون، شدت ضربان قلب،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Experiments were conducted to investigate the cavity length pulsation characteristics in jet pumps with different area ratios during limited operation stage. Images of various cavitating flows were captured and analyzed to study the cavity length pulsation characteristics by high speed camera technology. It was found that the development tendency of time-averaged cavity length can be divided into two sections with different pulsation intensity by throat length. Further analysis indicated that the time-averaged cavity length is a function of area ratio and outlet pressure ratio independent of the inlet pressure. And the time-averaged cavity length decreases slowly and then faster with the increase of comprehensive parameters. Meanwhile, the cavity length pulsation can be decomposed into low frequency component and high frequency component. The pulsation intensity of low frequency component is relatively high during unstable limited operation stage, while it is at a low level during stable limited operation stage. Besides, smaller area ratio and inlet pressure result in larger pulsation intensity of low frequency component during unstable limited operation stage. The experimental points of high frequency component pulsation intensity collapsed around a V-shaped curve and it reached the minimum value when time-averaged cavity length is approximate to the throat length.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 163, 15 November 2018, Pages 61-73
نویسندگان
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