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Measurements of Minute Unsteady Pressure on Three-Dimensional Fan with Arbitrary Axis Direction

Hirata, Katsuya    (Department of Mechanical Engineering, Doshisha University   ); Fuchi, Takuya    (Department of Mechanical Engineering, Doshisha University   ); Onishi, Yusuke    (Department of Mechanical Engineering, Doshisha University   ); Takushima, Akira    (Samsung Yokohama Research Institute   ); Sato, Seiji    (Samsung Yokohama Research Institute   ); Funaki, Jiro    (Department of Mechanical Engineering, Doshisha University  );
  • 초록

    The present study is a fundamental approach to develop the measuring technology for minute fluctuating pressures on the three-dimensional blade surfaces of the fan which rotates with an arbitrary rotation-axis direction. In this situation, we are required to correct the centrifugal-force effect, the gravitational-force effect and the other leading-error effects for accurate measurements of the minute pressures. The working fluid is air. A pressure transducer rotating with an arbitrary attitude is closely sealed by a twofold shroud system. The rotational motion with an arbitrary attitude is produced by fixing the pressure transducer to the cantilever which is connected to a motor-driven disc of 500mm in diameter and 5mm in thickness. As a result, we have quantitatively determined main governing effects upon the non-effective component of the pressure-transducer signal.


  • 주제어

    Fluctuating pressure .   Pressure measurement .   Unsteady pressure .   Fan .   Low speed.  

  • 참고문헌 (9)

    1. Nishi, M., “Surging Characteristics of Conical and Elbow Type Draft Tubes,” Proceeding of the 12th IAHR Symposium on Hydraulic Machinery and System, Stirling, 1984, pp. 272-283. 
    2. Nishi, M., Matsunaga, S., Kubota, T., Senoo, Y., “Flow Regimes in an Elbow-Type Draft Tube”. Proceeding of the 11th IAHR Symposium on Hydraulic Machinery and System, Amsterdam, 1982, pp. 1-13, paper 38. 
    3. Nishi, M., Wang, X., Okamoto, M., Matsunaga, S., “Further Investigation on the Pressure Fluctuations Caused by Cavitated Vortex Rope in an Elbow Draft Tube,” In Cavitation and Gas Fluid Flow Machinery and Devices (1994), ASME, pp. 63-70. 
    4. Prenat, J-E., Jacob, T., “Investigating the Behavior at High Load of a Francis Turbine Model,” 13th IAHR Symposium, Montreal, 1986. 
    5. Arzola, F., Azuaje, C., Zambrano, P., Gulbrandsen, G., “Undesired Power Oscillations at High Load in Large Francis Turbines. Experimental Study and Solution,” 23rd IAHR Symposium, Yokohama, 2006. 
    6. Koutnik, J., Pulpitel, L., “Modeling of the Francis Turbine Full-Load Surge,” Modeling, Testing and Monitoring for Hydro Power Plants, Lausanne, 1996. 
    7. Koutnik, J., Nicolet, C., A.Schoul, G., Avellen, F., “Overload Surge Event in a Pumped- Storage Power Plant,” 23rd IAHR Symposium, Yokohama, 2006. 
    8. Chen, C., Nicolet, C., Yonezawa, K., Farhat, M., Avellen, F., Tsujimoto, Y., “One-Dimensional Analysis of Full Load Draft Tube Surge,” ASME Journal of Fluids Engineering, vol.130, Issue 4, 041106. 
    9. Sabersky, R., 1999, “Fluid Flow: A First Course in Fluid Mechanics, 4th ed.,” Prentice-Hall, New Jersey. 

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