Application of the Streamline Curvature Method to a Solution of the Direct Problem of an Open Propeller

摘要

A method is presented of analyzing the flow field and predicting the performance characteristics of an open propeller. The flow field is calculated using the streamline curvature method, an iterative procedure which simultaneously satisfies the principles of conservation of total energy, momentum and continuity. The direct problem solution requires the calculation of the outlet flow angles for the propeller blade sections. These flow angles are a combination of the measured blade outlet angles and the deviation angles due to real fluid effects. The method of calculating these deviation angles is described in detail. Once the flow field has been established, the propeller performance parameters can then be calculated using simple momentum and energy considerations. Good correlation between predicted data and experimental measurements has been obtained using this direct analysis method. (Author)