摘要
为研究不同密实度双机组垂直轴潮流能水轮机在不同初始相位角下的水动力性能,采用CFD数值模拟方法得到各个水轮机组的效率曲线变化规律,并通过分析不同密实度水轮机在不同初始相位角下的压力云图和涡量图,解释变化机理.研究结果表明:相位角对不同密实度双机组水轮机的效率影响规律相似,随着相位角的增大,1号机组中高速比效率逐渐减小,而2号机组效率随着相位角增加而增大;当不同密实度水轮机处于中间相位角时,两个机组的效率基本一致,有利于电能输送,且此时机组受到的压力最小.所以不同密实度潮流能双机组水轮机应选取中间相位角为最优相位角.
In order to examine the impaction of different initial phase angles on the hydrodynamic performance of vertical axis tidal twin-turbine with different densities, this paper used CFD numerical simulation method to obtain the variation law of efficiency curves, and then explained the change mechanism through the detail analysis of the pressure diagram and vorticity graph of different density vertical axis tidal turbine with different phase angles. The results show that the influences of the phase angle on different density twin-turbine are similar. With the increase of phase angle, the efficiency of unit 1 with middle and high ratios is reduced gradually, unit 2 is the exact opposite of unit 1; When different density tidal turbine works at the respective middle phase angle, the efficiency of unit 1 and unit 2 of almost the same, which benefits the power delivery. Moreover, middle phase angles minimize the pressure of units. So the respective middle phase angle should be chosen as the optimal phase angle for different density tidal twin-turbines.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2016年第8期179-184,共6页
Journal of Harbin Institute of Technology
基金
国家自然科学基金(51209060
11572094)
高等学校博士学科点专项科研基金(20122304120035)
黑龙江省自然科学基金(E2016021)
哈尔滨市科技创新人才研究专项资金(2015RQQXJ014)
