| 10 | Results and Analysis of a L2F Flow Field Investigation within a High-Speed High-Pressure Centrifugal Compressor显示文摘The paper describes experimental results obtained using a laser two-focus anemometry technique in a high-speed, high-pressure ratio unshrouded centrifugal compressor. Measurements in such a small impeller are extremely difficult as the flow is restricted to narrow passages and as the temperature rise is very high. Even if the working principle of laser anemometry is well documented in literature, some specialities of our LA system are discussed.A description and an analysis of the inlet now field, based on integral methods, are proposed. Some passage velocity contours are presented. Whereas a potential flow structure exists up to the high meridional curvature region, the throughfiow pattern is largely distorted in the radial part of the impeller.Noticeable differences in ftow pattern between both channels are found, particularly through the low momentum fluid zone. A qualitative study of the vortical mechanisms ascribes them to the tip clearance effects. | I.Thebinjac I.Claudin (Laboratoire de Mecanique des Fluides et d’Acoustique UMR CNRS 5509 / ECL / UCB Lyon I Ecole Celltrale de Lyon, BP 163, 69131 Ecully Cedex, France) | 1997 | Journal of Thermal Science1997，6，3： | 0 |
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