摘要
分析了混流可逆式水轮机转轮轴向水推力的构成,给出了相关的数学计算模型.结合某抽水蓄能电站实际工程,分别利用解析计算和数值计算两种方法进行了水轮机转轮轴向水推力的比较计算,指出转轮轴向水推力的计算精度主要取决于高压腔内转轮表面所受轴向水推力F11,F21的计算精度,而影响F11,F21值大小的主要因素是止漏环漏水量和高压腔内水流的旋转角速度;当上、下止漏环外径差值较小并假定上、下止漏环漏水量相等的情况下,解析计算方法求出的转轮轴向水推力结果误差不大.
The composition of axial thrusts was analyzed, and a corresponding numerical model was given. In combination with a practical project of a pumped-storage hydropower plant, the calculated results of the axial thrust by the methods of analytical calculation and numerical calculation were compared. It was pointed out that the precision of calculation of the axial thrust on turning wheels was mainly determined by that of the axial thrusts F_(11) and F_(12) acting on the surface of the turning wheels in high-pressure cavities, and that the leakage from sealing rings and angular velocity of water flow in high-pressure cavities were the main factors affecting the values of F_(11) and F_(12). It was also indicated that, with the equal leakage from the upper and lower sealing rings, the error of the calculated result of the axial thrust by the analytical method was small if the difference between the outside diameters of the upper and lower sealing rings was small.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第5期557-561,共5页
Journal of Hohai University(Natural Sciences)
基金
水利部创新项目(SCX2001 13)
国电华东公司科学技术项目(T0305)
关键词
混流可逆式水轮机
轴向水推力
解析计算
数值计算
压力分布
flow-mixing reversible hydraulic turbine
axial thrust
analytical calculation
numerical calculation
pressure distribution
