摘要
基于欧拉 -拉格朗日解基本思想 ,在模拟计算了双级跨音速燃气透平三元粘性湍流场基础上 ,采用颗粒随机轨道模型和PSIC[1] 法求解了低颗粒浓度气固双向耦合后两种不同密度的分布直径颗粒的运动轨迹 ,并据此计算了叶片的冲蚀率 ,其分布规律与实物叶片的冲蚀情况比较接近。然后利用所建立的叶片冲蚀率与叶片振频的相互关系 ,预估了叶片振频因冲蚀而随时间发生的变化 。
The movement loci of two different density distribution-diameter particles after a gas-solid dual-direction coupling of low particle concentration were solved based on Euler-Lagrange solution basic idea and the simulation calculation of the three-dimensional viscid turbulent flow field of a dual-stage transonic gas turbine. This has been accomplished through the use of a particle random trajectory model and PSIC method. On this basis the erosion rate of the blades was calculated: Its distribution law relatively approximates to the erosion condition of full-scale blades. Then, by utilizing the interrelationship of the established blade erosion rate and vibration frequency the time-dependent variation of blade vibration frequency with erosion was forecast. As a result, a fruitful attempt has been made to identify the influence of blade erosion on blade vibration frequency.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2002年第4期379-382,共4页
Journal of Engineering for Thermal Energy and Power
基金
上海市教委自然科学基金资助项目 ( 2 0 0 0E12 )
