気化器ダブルベンチュリ内の流れに関する研究 : 第4報,小ベンチュリ内の空気流の解析

概要

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The flow in small venturi of a double venturi system in a carburetor with a main nozzle protruded at the throat is calculated in two dimensions by the finite element method. The governing equations are based on the stream function and the vorticity. Analysis is performed for seven kinds of main nozzle protrusion lengths in three types of diffuser angles. The separation region behind the main nozzle extends with an increase of the nozzle length. The results are evaluated in terms of the effective flow area at the exit of the venturi. The area change with protrusion length shows three stages, which is similar to the change of the air flow ratio for the small venturi observed in the former experiment using a three-dimensional model. The effective flow area is concluded to be responsible for the air flow ratio.
一般社団法人日本機械学会の論文
1988-06-25