Numerical investigation of blade tip with different groove effect and its dynamic analysis of axial flow fan

This paper deals with an experimental investigation into the influence of a vaned recess casing treatment on the performance of an industrial-type axial-flow fan with a hub-tip ratio of 0.4. The treatment has been tested in a variety of configurations relative to the fan, with an emphasis on the amount of fan blade tip exposure to the treatment. Two sets of blading, one of which is of the fully reversible type, have been investigated. Detailed flow measurements have been carried out with a slanted hot wire probe to provide an insight into the operation of the device and into the nature of the rotating stall in the solid casing configuration. Strain gauges have been employed to enable blade stresses to be recorded and an in-duct microphone to enable comparative tests on fan noise has also been used.

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Numerical investigation of differential speed operation of two impellers of contra-rotating axial-flow fan

Advances in Mechanical Engineering ◽

10.1177/1687814017720083 ◽

2017 ◽

Vol 9 (10) ◽

pp. 168781401772008 ◽

Cited By ~ 4

Author(s):

Xiaobo Sun ◽

Dawei Meng ◽

Baowen Liu ◽

Qian Wang

Keyword(s):

Numerical Investigation ◽

Axial Flow ◽

Axial Flow Fan ◽

Differential Speed

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Numerical Investigation of Blade Trimming Effect on Performance of Axial Flow Fan

Journal of Mechanical Engineering ◽

10.3901/jme.2014.10.183 ◽

2014 ◽

Vol 50 (10) ◽

pp. 183

Author(s):

Chunxi LI

Keyword(s):

Numerical Investigation ◽

Axial Flow ◽

Axial Flow Fan

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Improvement of Unstable Characteristics of an Axial Flow Fan by Air-Separator Equipment

Journal of Fluids Engineering ◽

10.1115/1.3242611 ◽

1987 ◽

Vol 109 (1) ◽

pp. 36-40 ◽

Cited By ~ 10

Author(s):

Y. Miyake ◽

T. Inaba ◽

T. Kato

Keyword(s):

Pressure Distribution ◽

Axial Flow ◽

Rotating Stall ◽

Axial Flow Fan ◽

Blade Passage ◽

Geometric Conditions ◽

Different Types ◽

Blade Tip ◽

Discharge Distribution ◽

Air Separator

The authors’ previous papers demonstrated that an air-separator is the most effective equipment among various different types for the improvement of unstable characteristics of an axial-flow rotor. Further experiments revealed that this equipment could eliminate the unstable characteristics thoroughly even for a build which originally accompanied a heavy rotating stall. This paper describes the geometric conditions to realize this and discusses its performance mechanism on the basis of the experiments showing the discharge distribution of the bleeding flow from the blade tip to separator passage as well as the pressure distribution in a blade passage at the tip section of the rotor. It is suggested that the equipment is equally useful at any stage of a multistage rotor.

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