Effects of approaching flow types on the performances of straight conical diffusers

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概要

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• This paper describes the effects of types of an approaching flow on the performances of straight conical diffusers. Also, the relationships among inlet boundary layer thickness, inlet swirling components and diffuser performances are investigated. Tests are carried out on straight conical diffusers with total divergence angles ranging from 6° to 18° and with diffuser area ratios ranging from 2.1 to 15.9. According to the result, good performances are obtained if the approaching flow has a symmetrical axial velocity profile with one directional swirling component or a distorted axial velocity profile with double spiral swirling components, and the performances are not so good if it has a simple distorted axial velocity profile without swirling components or with one directional swirling component.

• 一般社団法人日本機械学会の論文

著者

• Kuzuhara Sadao

  Department Of Mechanical Engineering Mie University

• Shimizu Yukimaru

  Department Of Mechanical Engineering Mie University

• NAGAFUSA Makoto

  Tokyo Shibaura Electric co.

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• Effects of approaching flow types on the performances of straight conical diffusers

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