Hydrodynamic Design of Pump Diffuser Using Inverse Design Method and CFD  

Oleh:

Zangeneh, Mehrdad ; Goto, Akira

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 124 no. 2 (2002), page 319-328.
Topik: design methods; hydrodynamic design; pump diffuser; design method; CFD

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

A new approach to optimizing a pump diffuser is presented, based on a three - dimensional inverse design method and a Computational Fluid Dynamics (CFD) technique. The blade shape of the diffuser was designed for a specified distribution of circulation and a given meridional geometry at a low specific speed of 0.109 (non - dimensional) or 280 (m(3)/min, m, rpm). To optimize the three - dimensional pressure fields and the secondary flow behavior inside the flow passage, the diffuser blade was more fore - loaded at the hub side as compared with the casing side. Numerical calculations, using a stage version of Dawes three - dimensional Navier - Stokes code, showed that such a loading distribution can suppress flow separation at the corner region between the hub and the blade suction surface, which was commonly observed with conventional designs having a compact bowl size (small outer diameter). The improvements in stage efficiency were confirmed experimentally over the corresponding conventional pump stage. The application of multi - color oil - film flow visualization confirmed that the large area of the corner separation was completely eliminated in the inverse design diffuser.

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