摘要
本工作以适应用于微型压缩空气储能(micro-CAES)系统的涡旋膨胀机为研究对象,采用计算流体力学(CFD)的方法对涡旋膨胀机工作过程进行非定常数值模拟,得到膨胀机内部温度场、压力场和速度场的分布,研究了吸气温度对涡旋膨胀机性能的影响规律及工作腔流场分布特点,结果显示:膨胀机吸气温度的升高,能够增加单位质量流量的输出功;随着吸气温度的下降,动涡旋盘所受轴向气体力增大,径、切向气体力减小;膨胀机工作过程中工作腔内的温度分布并不是沿涡旋盘半径方向逐渐下降,两侧背压腔存在较大的机械能损耗,背压腔温度会高于上游排气腔。该研究结果为涡旋膨胀机排气结构的设计提供了理论依据。
T This study aims to provide a theoretical basis for the design of a scroll expander for a micro-compressed air energy storage (micro-CAES) system, by using computational fluid dynamics (CFD) to obtain temperature, pressure and velocity fields in the working chambers. The effects of inlet temperatures on the performance of the scroll expander and the flow fields of the working chambers were investigated. The results showed that the output power per unit mass flow increased with increasing inlet temperature. The axial force acting on the orbiting scroll increased with decreasing inlet temperature, and the tangential and radial forces decreased with decreasing inlet temperature. The temperature distributions of the working chambers were not always increasing along the radial direction of the scroll plate. There existed energy losses in the backpressure chambers, and the temperature of the backpressure chambers can be higher than that of the exhaust chambers.
作者
刘祯
吴华伟
张琎
邝勇
LIU Zhen;WU Huawei;ZHANG Jin;KUANG Yong(Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle,Hubei University of Arits and Science,Xiangyang 441053,Hubei,China;School of Automotive and Traffic Engineering,Hubei University of Arts and Science,Xiangyang 441053,Hubei,China;DONGFENG XIANGYANGTOURING CAR Co.,Ltd.,Xiangyang 441053,Hubei,China)
出处
《储能科学与技术》
CAS
CSCD
2019年第2期357-364,共8页
Energy Storage Science and Technology
基金
湖北省技术创新专项重大项目(2017AAA133)
"机电汽车"湖北省优势特色学科群开放基金(XKQ2018002)
