Detail Passive Control of Rotating Stall in A Parallel-Wall Vaned Diffuser by J-Grooves   Oleh:  Saha, Sankar L. ; Kurokawa, Junichi ; Matsui, Jun ; Immamura, Hiroshi Jenis: Article from Bulletin/Magazine Dalam koleksi: Journal of Fluids Engineering vol. 123 no. 3 (2001), page 507-515. Topik: diffuser; passive control; rotating stall; diffuser Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel In order to control and suppress instabilities caused by swirl flow, the authors have proposed a very simple passive method utilizing shallow grooves mounted on a casing wall or diffuser wall(s) parallel to the pressure gradient. The groove is termed a "J - groove." The method is theoretically analyzed and experimentally proved capable of suppressing rotating stall in a vaneless diffuser. The performance curve instability is characterized by the positive slope of the head - capacity curve of a mixed flow pump for the entire flow range. In continuation, this work is aimed at realizing experimentally the effect of J - grooves on suppressing rotating stall in the vaned diffuser of a centrifugal turbomachine. Thirteen double curvature vanes with various radial positions, various setting angles, and J - grooves of different dimensions are tested in a parallel wall vaned diffuser with a semi - open radial impeller with and without J - grooves. The results show that J - grooves can also suppress rotating stall in the vaned diffuser for the entire flow range. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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