%A CHEN Song-shan, , YAN Deng-feng, LU Wei-gang, GE Qiang %T Analysis on the Hump Air-pressure in the Low-headSiphon Pumping Setting during Starting Transient Period %0 Journal Article %D 2003 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2003.04.004 %P 10-12 %V 21 %N 4 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_1004.shtml} %8 2003-07-25 %X Based on theoretical analysis of aerodynamic characteristics on the discharge pipeline, dynamiccharacteristics of pump setting and combined with rotating speed law through actual measure, the mathematicalcalculation model of transient hump air-pressure during starting period is put forward considering unsteadyflow, pump performance curve and similitude laws in low-head siphon pumping installation. The variation lawsabout dynamic parameters can be obtained through Newton-Raphson method by the way of Composingmathematical model finite difference and nonlinear equation. The integrated model can predict the hump air-pressure in the low-head siphon pumping setting during starting transient period.