Numerical Investigation of Swirling Flow in Annular Diffusers With A Rotating Hub Installed at The Exit of Hydraulic Machines  

Oleh:

Kochevsky, A. N.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 123 no. 3 (2001), page 484-489.
Topik: HYDRAULICS; numerical investigation; swirling flow; annular diffusers; rotating hub; hydraulic machines

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

A single sweep method for the solution of Navier - Stokes equations is used for numeric al investigation of flow in annular diffusers formed by a cylindrical casing and a converging conical hub, with the presence of inlet swirl and / or hub rotation. It is shown that counter - swirlwise hub rotation prevents reverse flow from appearing. The paper discusses the efficiency characteristics of diffusers installed at the exit of hydraulic machines. It is shown that the energy losses in a diffuser and in a channel behind the diffuser become minimal in the presence of small inlet swirl in the opposite direction to hub rotation.

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