internal flow of a high specific-speed diagonal-flow fan (rotor outlet flow fields with rotating stall)
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ID: 214917
2003
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Abstract
We carried out investigations for the purpose of clarifying the rotor outlet flow fields with rotating stall cell in a diagonal-flow fan. The test fan was a high–specific-speed (ns=1620) type of diagonal-flow fan that had 6 rotor blades and 11 stator blades. It has been shown that the number of the stall cell is 1, and its propagating speed is approximately 80% of its rotor speed, although little has been known about the behavior of the stall cell because a flow field with a rotating stall cell is essentially unsteady. In order to capture the behavior of the stall cell at the rotor outlet flow fields, hot-wire surveys were performed using a single-slant hotwire probe. The data obtained by these surveys were processed by means of a double phase-locked averaging technique, which enabled us to capture the flow field with the rotating stall cell in the reference coordinate system fixed to the rotor. As a result, time-dependent ensemble averages of the three-dimensional velocity components at the rotor outlet flow fields were obtained. The behavior of the stall cell was shown for each velocity component, and the flow patterns on the meridional planes were illustrated.
| Reference Key |
shiomi2003internationalinternal
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| Authors | ;Norimasa Shiomi;Wen-Xin Cai;Akio Muraoka;Kenji Kaneko;Toshiaki Setoguchi |
| Journal | ACS omega |
| Year | 2003 |
| DOI |
10.1155/S1023621X03000319
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