سال انتشار: ۱۳۸۶

محل انتشار: اولین کنفرانس بین المللی بازرسی فنی و آزمون غیرمخرب

تعداد صفحات: ۷

نویسنده(ها):

Morteza H. Sadeghi – Laboratory of Vibrations and Modal analysis, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
Mohammad .T Shervani Tabar – Dean of Mechanical Faculty, Tabriz University, Tabriz, Iran
Hadi Arjmandi Tash – Laboratory of Vibrations and Modal analysis, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran
M. Mohammad Ettefagh – Laboratory of Vibrations and Modal analysis, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

چکیده:

One of the sources of instability in a centrifugal pump is cavitation phenomenon. Cavitation within a centrifugal pump can cause more undesirable effects, such as deterioration of the hydraulic performance (drop in headcapacity and efficiency curves), damage of the pump by pitting and erosion and structure vibration and resulting noise. Cavitation can appear within the entire range of operating conditions; therefore cavitation occurrence inside a pump and its intensity must, by all means, be identified. An average energy method for quantifying cavitation intensity has been developed. This is called the Logarithmic Cavitation Intensity (LCI). To establish the pump cavitation conditions, a statistical analysis has been undertaken in a real-time and a 1000-cycle LCI mean has been recommended as a proper criterion for defining the cavitation intensity. The results also show this method is capable of detecting cavitation by simple hardware with low sampling frequency resulting in reducing the computational time as well as hardware complexity and cost.