摘要
为了实现可控偏角垂直水轮机叶片按照给定运动规律运动,采用伺服电机和无线通讯技术控制叶片运动。对叶片数、叶片弦长及偏心率等不同组合的一系列水轮机进行试验,研究来流速度、偏心率、叶片数和叶片弦长对水轮机性能的影响。试验结果表明:增大来流速度可在整个速比范围内提高水轮机的能量利用率;增大偏心率、增加叶片数和增大叶片弦长均会使水轮机能量利用率在较低速比范围内有所提高,但同时会使CP-λ曲线越过峰值点后下降速度更快。
To control blades of vertical axis controlled variable pitch turbine moving by given law, servo motor and wireless communication technology were adopted. Model experiments of a series of turbines, which were different in blade number, blade chord and eccentricity, were carried out to investigate the influence of flow velocity, eccen- tricity, blade number and blade chord on the performance of turbine. The test results indicated that increasing flow velocity can improve the power coefficient of turbine in all tip speed ratio ; increasing eccentricity, blade number or blade chord can improve the power coefficient of turbine in lower tip speed ratio, and make the power coefficient of turbine drop faster after peak value.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2012年第7期1142-1148,共7页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50706008
50979020)
国家科技支撑计划(2008BAA15B04)
国家高技术研究发展(863)计划(2007AA05Z450)
关键词
潮流能
可控偏角水轮机
伺服电机
能量利用率
tidal energy
controlled variable pitch turbine
servo motor
power coefficient
