摘要
采用空化模型、Mixture多相流模型及SST k-ε模型,在攻角为8°的NACA-0016型三维翼形上增加翼形表面粗糙度及增加微孔的基础上进行了数值模拟分析。根据空泡份额的分布、升力系数、阻力系数和升阻比系数等变化因素判断了微孔及翼形表面粗糙度对翼形空化性能及水力性能的影响。研究结果表明:多相流及空化模型能很好地模拟三维翼形的空化情况,同时模拟结果增加翼形表面粗糙度及增加微孔对翼形的空化有一定的改善作用。但是增加翼形表面粗糙度会对翼形的受力特性有一定的削弱影响。仅仅是在翼形上面作研究,实际工程中可以运用到水轮机叶片的空化模拟中,但需要作进一步研究。
Based on the cavitation model,the Mixture multiphase flow model and model of SST k-ε,at the angle of attack of the committee of 8 ° in NACA- 0016 type on the three-dimensional airfoil increasing airfoil surface roughness and micro holes are simulated on the basis of the analysis. The influence of the surface roughness of micropore and airfoil on the cavitation performance and hydraulic performance of airfoil are determined according to the variation factors of air bubble share distribution,lift coefficient,drag coefficient and lift-drag ratio coefficient. The research results show that the multiphase flow and the cavitation model can well simulate the three dimensional airfoil cavitation conditions,and the simulation results increasing airfoil surface roughness and micro hole of the airfoil cavitation has certain effect,but that will increase the airfoil surface roughness of the airfoil hydraulic characteristics have a certain impact. This paper only studies the airfoil profile,and it can be used to further study the cavitation simulation of turbine blade in practical engineering.
作者
肖鑫明
桂林
XIAO Xin-ming;GUI Lin(College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China)
出处
《中国农村水利水电》
北大核心
2019年第2期182-186,共5页
China Rural Water and Hydropower
