Test Facility and the Available Inlet Flow Condition to Transonic Radial Diffusers

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  • 遷音速遠心ディフューザ試験装置とディフューザへの流入状態
  • センオンソク エンシン ディフューザ シケン ソウチ ト ディフューザ エ ノ

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Abstract

In order to supply the flow field to transonic radial diffusers, a transonic centrifugal impeller with backward blade angle of 40 deg was designed and produced on the basis of the data base accumulated through the authors' experimental study on a radial impeller. In the present paper, the impeller was tested without a diffuser, the flow conditions at the exit of the impeller were evaluated from the test data for impeller characteristics, and the basic data for designing test diffusers are presented. It is concluded that it is possible to pursue the experimental work on diffusers in the range of 21 deg to 11.6 deg in flow angle and up to 1.31 in Mach number using the present test facility.

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