TY - JOUR
TI - An optimized roots power machine based on negative displacement theory
AU - Xiao Yanjun
AU - Gao Jing
AU - Ren Jiamin
AU - Zhou Wei
AU - Wan Feng
AU - Liu Weiling
AU - Jiang Yunfeng
JN - Thermal Science
PY - 2021
VL - 25
IS - 2
SP - 955
EP - 965
PT - Article
AB - Roots power machine has obvious advantages in low and medium temperature waste heat recovery. The existing roots power machine has the problem of internal flow field disturbance, which seriously affects the power generation efficiency of the power machine. In order to solve the problem of disturbance of the internal flow field of roots power machine, the traditional involute rotor roots power machine is improved, and the roots power machine based on negative displacement involute rotor is proposed. The structure model and turbulence model of roots power machine are constructed, and the internal flow field simulation of roots power machine is realized by CFD. The pressure contour and torque change of roots power machine before and after improvement are compared, and the experimental research on the improved structure is carried out. The results show that the intensity of flow field disturbance in the modified involute rotor roots power machine decreases, and the working performance of the roots power machine improves,which provides a reference for the structural improvement and performance optimization of roots power machine.