Detailed stress tensor measurements in a centrifugal compressor vaneless diffuser
- Univ. of Liverpool (United Kingdom). Dept. of Mechanical Engineering
Detailed flow measurements have been made in the vaneless diffuser of a large low-speed centrifugal compressor using hot-wire anemometry. The three time mean velocity components and full stress tensor distributions have been determined on eight measurement plans within the diffuser. High levels of Reynolds stress result in the rapid mixing out of the blade wake. Although high levels of turbulent kinetic energy are found in the passage wake, they are not associated with strong Reynolds stresses and hence the passage wake mixes out only slowly. Low-frequency meandering of the wake position is therefore likely to be responsible for the high kinetic energy levels. The anisotropic nature of the turbulence suggests that Reynolds stress turbulence models are required for CFD modeling of diffuser flows.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 250826
- Report Number(s):
- CONF-940626-; ISSN 0889-504X; TRN: IM9629%%139
- Journal Information:
- Journal of Turbomachinery, Vol. 118, Issue 2; Conference: 39. international gas turbine and aeroengine congress and exposition, The Hague (Netherlands), 13-16 Jun 1994; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Off-design flow measurements in a centrifugal compressor vaneless diffuser
Aerodynamically induced radial forces in a centrifugal gas compressor: Part 2 -- Computational investigation