كاربرد روش مشخصه در تحليل پديده ضربه قوچ ايستگاه پمپاژ سو نهند تبريز

Waterhammer Analysis Using the Method of Characteristics on Nahand-Tabriz Pumping Station

Waterhammer phenomenon caused by pump failure and the sudden change of discharge and consequently the flow velocity, creates the sudden variation of pressure and initiates the upsurges and downsurges along the pipeline. If this abnormal pressure change does not control and adjust with an appropriate equipment, it may occur the destructive problems along the unprotected system. In this paper, by developing a computer program and using the method of characteristics, the governing equations of waterhammer phenomenon, on Nahand - Tabriz pumping station, as a case study, have been analyzed and the appropriate dimension of air chamber to control the surges has been calculated. It is shown that without using this control device, due to path convexity of discharge pipeline, the cavitation phenomenon may occur intensively along the pipeline.