摘要
进一步完善了非定常雷诺平均N-S方程求解程序,借助快速网格生成方法,对周期性俯仰运动下NA-CA0012叶栅的非失速绕流问题进行了数值模拟研究,并分析了振荡叶栅的迟滞效应以及俯仰运动各个参数对迟滞效应的影响。数值模拟结果与实验结果对比表明,本文发展的数值模拟方法是可靠的;结果还表明,随着振幅,折合频率的增加迟滞效应增强,平均攻角对迟滞效应无影响;保持无量纲参数——振幅和折合频率的乘积——恒定时,迟滞效应相同。
Numerical simulation of 2-D unsteady viscous flow around oscillating NACA0012 airfoil is carried out with dual-time stepping method and mixing length turbulence model and the numerical results are in good agreement with the published data of AGARD. Then the effect of oscillating amplitude, mean incidence and reduced frequency on the hysteresis loop. However a non-dimensional analysis reveals that the hysteresis effect would be the same just provided the same multiplying numerical value of reduced frequency and amplitude.
出处
《空气动力学学报》
CSCD
北大核心
2009年第2期255-259,共5页
Acta Aerodynamica Sinica
基金
国家自然科学基金资助项目(50776003)
高等学校学科创新引智计划项目
关键词
非失速
振荡叶栅
迟滞效应
unstalled
oscillating cascade
hysteresis effect
