The partial admission technique is widely used to control the output power of turbines. In some cases, it has more merits than full admission. However, additional losses, such as expansion, mixing, or pumping, are generated in partial admission as compared with full admission. Thus, an experiment was conducted in a linear cascade apparatus having a partial admission region in order to investigate the effect of partial admission on a blade row. The admission region was formed by a spouting nozzle installed at the inlet of the linear cascade apparatus. Its cross section was rectangular and its size is . The tested blade was axial-type and its chord was 200 mm. Nineteen identical blades were applied to the linear cascade for the partial admission experiment. The blades moved along the rotational direction in front of the admission region, and then operating forces and surface pressures on the blades were measured at the steady state. The experiment was conducted at a Reynolds number of based on the chord. The nozzle flow angle was set to 65 deg with a solidity of 1.38 for performance test at the design point. In addition, another two different solidities of 1.25 and 1.67 were applied. From the experimental results, when the solidity was decreased, the maximum rotational force increased but the maximum axial force decreased.
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e-mail: sycho@gnu.kr
e-mail: kyahn@kimm.re.kr
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December 2010
Research Papers
Forces and Surface Pressure on a Blade Moving in Front of the Admission Region
Soo-Yong Cho,
Soo-Yong Cho
Professor
Department of Mechanical and Aerospace Engineering (ReCAPT),
e-mail: sycho@gnu.kr
Gyeongsang National University
, 900 Gajwadong, Jinju, Gyeongnam 660-701, Republic of Korea
Search for other works by this author on:
Chong-Hyun Cho,
Chong-Hyun Cho
Professor
Department of Mechanical and Aerospace Engineering (ReCAPT),
Gyeongsang National University
, 900 Gajwadong, Jinju, Gyeongnam 660-701, Republic of Korea
Search for other works by this author on:
Kook-Young Ahn,
Kook-Young Ahn
Principal Researcher
Department of Eco-Machinery,
e-mail: kyahn@kimm.re.kr
Korea Institute of Machinery and Materials
, Daejeon 305-343, Republic of Korea
Search for other works by this author on:
Young-Cheol Kim
Young-Cheol Kim
Principal Researcher
Department of Eco-Machinery,
Korea Institute of Machinery and Materials
, Daejeon 305-343, Republic of Korea
Search for other works by this author on:
Soo-Yong Cho
Professor
Department of Mechanical and Aerospace Engineering (ReCAPT),
Gyeongsang National University
, 900 Gajwadong, Jinju, Gyeongnam 660-701, Republic of Koreae-mail: sycho@gnu.kr
Chong-Hyun Cho
Professor
Department of Mechanical and Aerospace Engineering (ReCAPT),
Gyeongsang National University
, 900 Gajwadong, Jinju, Gyeongnam 660-701, Republic of Korea
Kook-Young Ahn
Principal Researcher
Department of Eco-Machinery,
Korea Institute of Machinery and Materials
, Daejeon 305-343, Republic of Koreae-mail: kyahn@kimm.re.kr
Young-Cheol Kim
Principal Researcher
Department of Eco-Machinery,
Korea Institute of Machinery and Materials
, Daejeon 305-343, Republic of KoreaJ. Fluids Eng. Dec 2010, 132(12): 121101 (8 pages)
Published Online: December 3, 2010
Article history
Received:
April 9, 2010
Revised:
August 16, 2010
Online:
December 3, 2010
Published:
December 3, 2010
Citation
Cho, S., Cho, C., Ahn, K., and Kim, Y. (December 3, 2010). "Forces and Surface Pressure on a Blade Moving in Front of the Admission Region." ASME. J. Fluids Eng. December 2010; 132(12): 121101. https://doi.org/10.1115/1.4002468
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