Open AccessNumerical study of the influence of high-transonic outlet blade angle of the Wedge diffuser with airfoil characteristics on the performance centrifugal compressor
Author(s) -
Huan Bai,
Qingkuo Li,
Yi Wang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1676/1/012140
Subject(s) - airfoil , transonic , gas compressor , centrifugal compressor , diffuser (optics) , wedge (geometry) , mechanics , leading edge , materials science , overall pressure ratio , structural engineering , mechanical engineering , engineering , aerodynamics , physics , geometry , mathematics , optics , light source
In this paper, a transonic centrifugal compressor is investigated, and a design method of a wedge diffuser with airfoil characteristics is proposed. The effect of different outlet blade angles of the wedge diffuser with airfoil characteristics on the performance of the compressor was studied using a validated numerical calculation method. The results show that the use of a wedge diffuser with airfoil characteristics can more suitable for the transonic flow, which greatly reduces the flow loss of the diffuser pressure surface due to the inconsistent incidence. In addition, without changing the shape of the prototype compressor, the compressor performance is best when the outlet blade angle is 20 ~ 22 °. Compared with the prototype compressor, its peak efficiency increased by 0.93%, the pressure ratio increased by 0.517%, and the stable working margin increased by 4.2%.