摘要
以压缩空气储能(CAES)系统中膨胀机末级叶片为研究对象,针对末级叶片的离心力工况,提出了一种高效的等效叶冠约束模型,并对比了循环对称约束模型和多叶片模型的仿真结果。同时,还开发了一种能够模拟弹塑性和失效行为的本构程序。结果表明:与其他模型相比,等效叶冠约束模型的仿真结果与全尺寸模型结果最接近,兼具精度和效率优势;所编写的本构子程序可有效模拟17-4ph钢的应力-应变响应曲线;针对所研究的叶片构型,当失效发生在叶片径向约1/4位置处时,失效区域快速扩大。
Taking the last-stage blades in the expander of compressed air energy storage(CAES)system as research object,based on centrifugal force conditions,an efficient equivalent crown constraint model was proposed and the simulation results of the cyclic symmetry constraint model and the multi-blade model were compared.Simultaneously,a constitutive program capable of simulating elastoplasticity and failure behavior was developed.Results show that compared with other models,the simulation results of the equivalent crown constraint model are close to the full-size model results,showing both precision and efficiency advantages.The written constitutive subroutine can effectively simulate the deformation-load response curve of 17-4ph steel.Specifically,when failure begins to occur at about 1/4 of the radial position of the blade,the failure area grows rapidly.
作者
刘畅
朱阳历
张华良
陶海亮
李俊
左志涛
陈海生
LIU Chang;ZHU Yangli;ZHANG Hualiang;TAO Hailiang;LI Jun;ZUO Zhitao;CHEN Haisheng(Nanjing Institute of Future Energy System,Nanjing 211135,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2024年第3期355-360,共6页
Journal of Chinese Society of Power Engineering
关键词
末级叶片
离心力工况
失效行为
last-stage blade
centrifugal force condition
failure behavior