THERMAL SCIENCE

International Scientific Journal

Yanjun Xiao

,

Jing Gao

,

Jiamin Ren

,

Wei Zhou

,

Feng Wan

,

Weiling Liu

,

Yunfeng Jiang

AN OPTIMIZED ROOTS POWER MACHINE BASED ON NEGATIVE DISPLACEMENT THEORY

ABSTRACT
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.
KEYWORDS
Roots power machine, turbulence model, negative displacement involute rotor, flow field disturbance
PAPER SUBMITTED: 2020-05-25
PAPER REVISED: 2020-07-06
PAPER ACCEPTED: 2020-07-13
PUBLISHED ONLINE: 2020-09-12
DOI REFERENCE: https://doi.org/10.2298/TSCI200525256X
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [955 - 965]
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An optimized roots power machine based on negative displacement theory

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