Equivalent pipe algorithm for metal spiral casing and its application in hydraulic transient computation based on equiangular spiral model  

作　　者：彭小东 杨朝晖 刘善均 鞠小明 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University [2]Department of Water Resources of Guizhou Province

出　　处：《Journal of Hydrodynamics》2014年第1期137-143,共7页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.51179114)

摘　　要：For the metal spiral casing of water turbines, a new equivalent pipe algorithm is developed based on the idea of equiangu-lar spiral. Prototype tests and computations are carried out to investigate the hydraulic transient characteristics. The computation re-sults by using the new model are in a good agreement with the prototype test data with respect to the maximum speed of the tur-bine-generator unit, the maximum water hammer pressure in the spiral casing and the maximum vacuum in the draft tube. The propo-sed method is a significant improvement over the conventional algorithm with the accuracy increased and the error reduced by about 3%.For the metal spiral casing of water turbines, a new equivalent pipe algorithm is developed based on the idea of equiangu-lar spiral. Prototype tests and computations are carried out to investigate the hydraulic transient characteristics. The computation re-sults by using the new model are in a good agreement with the prototype test data with respect to the maximum speed of the tur-bine-generator unit, the maximum water hammer pressure in the spiral casing and the maximum vacuum in the draft tube. The propo-sed method is a significant improvement over the conventional algorithm with the accuracy increased and the error reduced by about 3%.

关 键 词：equiangular spiral metal spiral casing equivalent pipe hydraulic transient 

分 类 号：TK730.1[交通运输工程—轮机工程]