Numerical study of the influence of high-transonic outlet blade angle of the Wedge diffuser with airfoil characteristics on the performance centrifugal compressor. (November 2020)

• Record Type: Journal Article
• Authors: Bai, Huan; Li, Qingkuo; Wang, Yi
• Is Part Of: Journal of physics. Volume 1676(2020)
• Publication Date: 2020-11
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1676/1/012140
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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%.