円すいディフューザの一様流入時における性能線図と最適形状 : 自由流出の場合

概要

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To obtain the best performance and optimum geometries for a wide range of diffuser geometries, experiments have been performed on many conical diffusers having a uniform inlet flow outside the thin inlet boundary layer and free discharge using air flow. Performance data for diffusers are presented comprehensively in a pressure pecovery and effectiveness chart including optimum geometry lines. A comparison of present results with those in references related to the problems shows that the contours of the performance chart and optimum geometry lines do not conform among respective investigations under similar inlet and outlet conditions. The present performance chart and optimum lines approximately give average values of the results obtained by other investigators. For geometries of cone angle 2α between 6.8° and 30° the effectiveness may be expressed with a fair degree of accuracy by the relationship, η_p=1-0.0415α, when the area ratio is larger than 3.
一般社団法人日本機械学会の論文
1988-08-25