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INNOVATIVE APPROACHES TO PROPELLERS OFF-DESIGN PERFORMANCE MODELING

机译:推进器创新设计超越性能模型

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This article provides an overview on the challenges related to the prediction of propellers performance at preliminary design stage, ranging from numerical stability to simplicity required for being integrated into engine cycle models. After a description of the usual approach to propeller performance based on maps, and a discussion on its limitations, innovative methods are proposed, lying on the identification of losses trends combined with the use of propeller characteristic operating points over the whole usable area. These innovative approaches significantly reduce the number of required simulations or test cell points to be able to describe the full propeller range of operation, adding physics to the mathematical approach usually considered for turbomachinery component maps elaboration. Accuracy and stability of the considered approaches are discussed, along with an assessment of the required effort to set them up.
机译:本文概述了在初步设计阶段与螺旋桨性能预测相关的挑战,范围从数值稳定性到集成到发动机循环模型所需的简单性。在描述了基于地图的螺旋桨性能的常规方法并讨论了其局限性之后,提出了创新的方法,该方法基于对损失趋势的识别以及在整个可用区域内使用螺旋桨特征工作点的结合。这些创新方法大大减少了能够描述整个螺旋桨操作范围所需的仿真或测试单元点的数量,从而为通常用于涡轮机械零件图制作的数学方法增加了物理原理。讨论了所考虑方法的准确性和稳定性,并评估了建立这些方法所需的努力。

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