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Visualization of transient three-dimensional flow field with rotating stall in a diagonal flow fan

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Abstract

An Unsteady flow field with rotating stall cells in a high specific-speed diagonal flow fan has been investigated experimentally. Although a general feature of stall cells has already indicated, i.e., the number of stall cells is one and its propagating speed is approximately 80 percent of rotor speed, little has been known about the flow field when a rotating stall occurs because of its unsteadiness. In order to capture the behavior of the rotating stall cell, measurements of the flow field at the rotor inlet were carried out with a single slant hot-wire. Those data were processed by a so-called “double phase-locked averaging” (DPLA) technique, which enabled to capture the flow field of the cell in the reference co-ordinate system fixed to the rotor. As a result, time-dependent ensemble averages of the three-dimensional velocity components at the rotor inlet have been obtained and the behavior of the rotating stall cell has been illustrated with each velocity component.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Saga University, 1 Honjo-machi, 840-8502, Saga, Japan

    Shiomi N., Cai W. X., Kaneko K. & Setoguchi T.

Authors
  1. Shiomi N.
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  2. Cai W. X.
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  3. Kaneko K.
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  4. Setoguchi T.
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Additional information

Norimasa Shiomi: He received his master degree in Mechanical Engineering from Saga University in 1996. After that he has been working in Mechanical Engineering Depertment, Saga University as assistant. His research interest is turbomachinery, especially diagonal flow fan.

Wen Xin Cai: He received his BS (Eng) degree in Fluid Engineering from Department of Power Engineering, Huazhong University of Science and Technology (HUST, China) in 1990 and his master degree in Fluid Enineering from Xi’an Jiaotong University (China) in 1993. He received Ph.D (Eng) from Department of Mechanical Engineering, Saga University (Japan) in 2001. Now he is interested in the research on flow in fan.

Kenji Kaneko: He received Ph.D in Mechanical Engineering from Kyushu University in 1969. After completion of his Ph.D he has been a faculty member of Mechanical Engineering Department, Saga University, and currently is a professor. His research fields are fluid engineering and turbomachinery, especially internal flow of turbomachinery.

Toshiaki Setoguchi: He received Ph.D in Mechanical Engineering from Kyushu University in 1981. After completion of his Ph.D program, he has been a faculty member of Mechanical Engineering Depertment, Saga University, and currently is a professor. His research interests include compressible flows and turbomachinery, especially turbines for wave energy conversion.

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Shiomi, N., Cai, W.X., Kaneko, K. et al. Visualization of transient three-dimensional flow field with rotating stall in a diagonal flow fan. J Vis 5, 137–144 (2002). https://doi.org/10.1007/BF03182422

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  • DOI: https://doi.org/10.1007/BF03182422

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