Thermo-mechanical-dynamic coupling analysis on cold compressor rotor

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Wei, C.B.^1^2 ; Dong, X.B.^1^2 ; Yang, S.Q.^1 ; Jia, Q.M.^1^2 ; Zhang, S.Y.^1^2 ; Lv, C.^1 ; Wu, J.H.^1

State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Cold compressors;    Contact effect;    Finite element software;    Low temperatures;    Static structural analysis;    Stress and deformation;    Temperature differences;    Thermo-mechanical dynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012048/pdf
DOI  :  10.1088/1757-899X/502/1/012048

来源: IOP

【 摘 要 】

Cold compressor rotor works in complex thermal filed, which endures huge temperature differences from room temperature to low-Temperature. To study the effect of thermal field on deformation and dynamics of cold compressor rotor, a thermo-mechanical-dynamic coupling analysis is carried out by finite element software ANSYS. Firstly, a thermal analysis on the entire compressor is carried out by CFX and the temperature distribution is obtained. Secondly, a static structural analysis considering thermal loads and contact effect is performed. The thermal stress and deformation are obtained. Finally, a pre-stress modal analysis in working thermal field is carried out. The results show that: The axial distance between blade tip and thrust disc reduces by 117.41 μm. The first two natural frequencies of the cold compressor rotor have a slight improvement by less than 2.16% and higher order natural frequency is more sensitive to thermal effect.