The effects of blade deformation under running conditions on the performance of a highly loaded transonic mixed flow impeller were investigated. Two impellers were manufactured, one using the “running” blade profiles as designed and one using the converted “unrunning” or “cold” geometry. Both impellers were tested experimentally and investigated numerically. The test data taken with smooth casing showed that at maximum speed, the isentropic efficiency and pressure ratio of the running geometry was higher than the unrunning geometry by about 0.4% and 1.4%, respectively. However, the difference in performance diminished in the presence of recirculating casing treatment. Numerical calculations suggested that the differences at high speeds were mainly due to the variation in the impeller tip clearance. The calculations using deformed blade profiles under centrifugal load only, predicted performance differences which were about twice as high as the measured values. However, closer predictions were obtained when the effects of pressure loads on blade deformation were included using closely coupled fluid-structural analyses.
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December 2015
Research-Article
Effects of Blade Deformation on the Performance of a High Flow Coefficient Mixed Flow Impeller
Hamid Hazby,
Hamid Hazby
PCA Engineers Ltd.,
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: h.hazby@pcaeng.co.uk
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: h.hazby@pcaeng.co.uk
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Ian Woods,
Ian Woods
PCA Engineers Ltd.,
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: ian.woods@pcaeng.co.uk
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: ian.woods@pcaeng.co.uk
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Ryusuke Numakura,
Ryusuke Numakura
Turbo Machinery and Engine
Technology Department,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: ryuusuke_numakura@ihi.co.jp
Technology Department,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: ryuusuke_numakura@ihi.co.jp
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Hideaki Tamaki
Hideaki Tamaki
Corporate Research and Development,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: hideaki_tamaki@ihi.co.jp
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: hideaki_tamaki@ihi.co.jp
Search for other works by this author on:
Hamid Hazby
PCA Engineers Ltd.,
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: h.hazby@pcaeng.co.uk
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: h.hazby@pcaeng.co.uk
Ian Woods
PCA Engineers Ltd.,
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: ian.woods@pcaeng.co.uk
Studio 2,
Deepdale Enterprise Park, Nettleham,
Lincoln LN2 2LL, UK
e-mail: ian.woods@pcaeng.co.uk
Michael Casey
Ryusuke Numakura
Turbo Machinery and Engine
Technology Department,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: ryuusuke_numakura@ihi.co.jp
Technology Department,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: ryuusuke_numakura@ihi.co.jp
Hideaki Tamaki
Corporate Research and Development,
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: hideaki_tamaki@ihi.co.jp
IHI Corporation,
1, Shin-Nakahara-cho, Isogo-ku,
Yokohama-shi, Kanagawa 235-8501, Japan
e-mail: hideaki_tamaki@ihi.co.jp
Manuscript received July 16, 2015; final manuscript received July 30, 2015; published online September 23, 2015. Editor: Kenneth C. Hall.
J. Turbomach. Dec 2015, 137(12): 121005 (9 pages)
Published Online: September 23, 2015
Article history
Received:
July 16, 2015
Revised:
July 30, 2015
Citation
Hazby, H., Woods, I., Casey, M., Numakura, R., and Tamaki, H. (September 23, 2015). "Effects of Blade Deformation on the Performance of a High Flow Coefficient Mixed Flow Impeller." ASME. J. Turbomach. December 2015; 137(12): 121005. https://doi.org/10.1115/1.4031356
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