Measurements of the internal flow velocity distributions in a cross-flow fan were made by particle-tracking velocimetry (PTV). The flow paths (pathlines) were photographed using a digital camera and analyzed using a computer program developed by Tsurusaki and Urata (1989) in order to obtain the velocity distributions. From the velocity distributions, the vorticity distributions were calculated and the vorticity supply and diffusion in the eccentric vortex region was discussed based on an axisymmetric vortex model. A numerical simulation was carried out using a random walk model. The work done by the impeller was also discussed based on the measured velocity distributions.
Issue Section:Research Papers
Numerical Study of Slightly Viscous Flow,”
J. Fluid Mech., Vol.
Spanwise Mixing in Multistage Axial Flow Compressors: Part 1—Experimental Investigation,”
ASME Journal of Turbomachinery, Vol.
A Study of Cross Flow Fan,”
Osaka University Technology Reports, Vol.
Flow Theory and Performance of Tangential Fans,”
Proc. Instn. Mech. Engrs., Vol.
180, Part 1, No.
Kitagawa, K., et. al., 1992, “A Numerical Simulation of Cross Flow Fan,” Boundary Elements in Fluid Dynamics, Computational Mechanics Publications, pp. 3–20.
Lajos, T., 1975, “Investigation of the Flow Characteristics in the Impeller of the Tangential Fan,” Proc. 5th Conf. on Fluid Machinery, pp. 567–577.
Mazur, J., and Singh, T., 1987, “Momentum Exchanges and Energy Transfers in Cross Flow Fans,” ASME Paper No. 87-GT-32.
A Study on Cross-Flow Fans,”
Trans. JSME, Vol.
2075, ibid., pp. 2076–2089 (in Japanese).
Nakamura, K., 1985, “A Study of High-Performance Cross-Flow Fan based on Internal Flow Analysis,” Doctoral thesis, Osaka University (in Japanese).
Okamoto, Y. et al., 1991, “Discrete Vortex Method Analysis of Cross Flow Fan,” Prepr. JSME, No. 914-4, pp. 170–172 (in Japanese).
A Study of the Cross Flow Fan,”
Journal Mechanical Engineering Science, Vol.
Numerical Analysis of Cross-Flow Fan by a Clouds-in-Cells Method Combined with the Finite-Element Method,”
Trans. JSME, Vol.
545, B, pp.
Tsurusaki, H., and Urata, T., 1989, “A Measuring Method for Three-Dimensional Steady Flow by Digital Image Processing of Pathline Pictures,” Proc. ASME, Flow Visualization, FED-Vol. 85, pp. 95–100.
Studies on the Flow of Cross-Flow Impellers,”
Bulletin of the JSME, Vol.
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