LAPSE

LAPSE:2019.1218
Published Article
LAPSE:2019.1218
Effects of Single-arc Blade Profile Length on the Performance of a Forward Multiblade Fan
Yikun Wei, Cunlie Ying, Jun Xu, Wenbin Cao, Zhengdao Wang, Zuchao Zhu
November 24, 2019
The effects of single-arc blade profile length on the performance of a forward multiblade fan are investigated in this paper by computational fluid dynamics and experimental measurement. The present work emphasizes that the use of a properly reduced blade inlet angle (β1A) and properly improved blade outlet angle (β2A) is to increase the length blade profile, which suggests a good physical understanding of internal complex flow characteristics and the aerodynamic performance of the fan. Numerical results indicate that the gradient of the absolute velocity among the blades in model-L (reducing the blade inlet angle and improving blade outlet angle) is clearly lower than that of the baseline model and model-S (improving the blade inlet angle and reducing blade outlet angle), where a number of secondary flows arise on the exit surface of baseline model and model-S. However, no secondary flow occurs in model-L, and the flow loss at the exit surface of the volute (scroll-shaped flow patterns) for model-L is obviously lower than that of the baseline model at the design point. The comparison of the test results further shows that to improve the blade profile length is to increase the static pressure and the efficiency of the static pressure, since the improved static pressure of the model-L rises as much as 22.5 Pa and 26.2%, and the improved static pressure efficiency of the model-L rises as much as 5 % at the design flow rates. It is further indicated that increasing the blade working area provides significant physical insight into increasing the static pressure, total pressure, the efficiency of the static pressure and the total pressure efficiency.
Keywords
blade profile length, experimental test, forward multiblade fan, numerical simulation, performance
Suggested Citation
Wei Y, Ying C, Xu J, Cao W, Wang Z, Zhu Z. Effects of Single-arc Blade Profile Length on the Performance of a Forward Multiblade Fan. (2019). LAPSE:2019.1218
Author Affiliations
Wei Y: National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
Ying C: Zhejiang Yilida Ventilator Co., Ltd., Taizhou 318056, China
Xu J: Zhejiang Yilida Ventilator Co., Ltd., Taizhou 318056, China
Cao W: Zhejiang Yilida Ventilator Co., Ltd., Taizhou 318056, China
Wang Z: National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
Zhu Z: National-Provincial Joint Engineering Laboratory for Fluid Transmission System Technology, Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China
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Journal Name
Processes
Volume
7
Issue
9
Article Number
E629
Year
2019
Publication Date
2019-09-17
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7090629, Publication Type: Journal Article
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LAPSE:2019.1218
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doi:10.3390/pr7090629
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Nov 24, 2019
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Nov 24, 2019
 
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Original Submitter
Calvin Tsay
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