DETAILED FLOW MEASUREMENTS IN A CENTRIFUGAL-COMPRESSOR VANELESS DIFFUSER


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Pinarbaşi A. , Johnson M.

JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, cilt.116, ss.453-461, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 116
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1115/1.2929432
  • Dergi Adı: JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME
  • Sayfa Sayıları: ss.453-461

Özet

Hot-wire anemometer measurements have been made in the vaneless diffuser of a 1-m-dia low-speed backswept centrifugal compressor using a phase lock loop technique. Radial tangential, and axial velocity measurements have been made on eight measurement planes through the diffuser. The flow field at the diffuser entry clearly shows the impeller jet-wake flow pattern and the blade wakes. The passage wake is located on the shroud side of the diffuser and mixes out slowly as the flow moves through the diffuser. The blade wakes, on the other hand, distort and mix out rapidly in the diffuser. Contours of turbulent kinetic energy are also presented on each of the measurement stations, from which the regions of turbulent mixing can be deduced.