ディフューザベーンを有する遠心インペラの通路内流れ計測システム

概要

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In order to improve the overall performance for a centrifugal turbomachinery with the vaned diffuser, it is important to well understand the aerodynamic characteristics of the impeller-diffuser interaction. In general, the reliable data with respect to such characteristics are obtained from the flow measurement inside the impeller passage. Therefore, we construct the measurement system by which the passage flow with the impeller-diffuser interaction is accurately measurable. The system is composed of a hot-wire anemometer and a phase lock circuit which is designed to digitize the hot-wire output for 25 positions exactly divided between neighboring two vanes of the diffuser. In this paper, such the system is described, and then a measurement example of the passage flow with the impeller-diffuser interaction is shown at the design operation. Even in this operation, the influence of the interaction on the passage flow appears obviously at impeller outlet.
八代工業高等専門学校の論文
2004-03-01