摘要
考虑涡轮流道径向不同圆柱层液体至轴线距离对液体质点的运动速度以及与叶片间相互作用的影响,建立了一种简化的涡轮液流模型,并对涡轮轴流系数和环流系数进行了适当修正,设计了一种扭曲叶片涡轮。采用数值模拟的方法,对比分析了扭曲叶片涡轮和直叶片涡轮的水力性能,验证了该设计方法的可行性。结果表明:扭曲叶片涡轮较直叶片涡轮,在压降减小39.6%时,转化扭矩降低19.4%,效率提高10.5%,并且其综合水力性能得到了提升。相关研究为扭曲叶片涡轮的设计提供了理论依据,对实际工程具有一定的参考价值。
Considering the influence of the distance between the liquid along radial different cylindrical layers in turbine channel and axis on the velocity of liquid particles and interaction force between blades and them,a simplified turbine fluid model is established.The axial flow coefficient and circulating coefficient of turbine were duly corrected,and turbine with twisted blades was designed.Additionally,the hydraulic performance of turbine with twisted blades and straight blades was analyzed comparatively by numerical simulation analysis,which verified the feasibility of the design method.The results show that the torque of turbine with twisted blades decrease 19.4%,and its hydraulic efficiency increase 10.5%while its pressure drop decrease 39.6%,comparing to turbine with straight blades.What s more,its comprehensive hydraulic performance is improved.The research provides a theoretical basis for the design of turbine with twisted blades and is of certain guiding significance for the actual engineering.
作者
龚盼
王鹏
张晨
冯定
涂忆柳
GONG Pan;WANG Peng;ZHANG Chen;FENG Ding;TU Yiliu(College of Mechanical Engineering, Yangtze University, Jingzhou Hubei 434023, China;Hubei Engineering Research Center for Oil & Gas Drilling and Completion Tools, Jingzhou Hubei 434023,China;Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Wuhan Hubei 430100, China)
出处
《机床与液压》
北大核心
2019年第19期153-158,共6页
Machine Tool & Hydraulics
关键词
涡轮钻具
扭曲叶片
数值模拟
水力性能
Turbodrill
Twisted blade
Numerical simulation
Hydraulic performance
