论文标题
基本出血的唤醒中的再循环区域
Recirculation regions in wakes with base bleed
论文作者
论文摘要
带有基础出血的唤醒中分离的再循环区域的出现决定了许多天然生物和技术应用的空气动力学特性。在这项工作中，我们介绍了一个分析模型，该模型在无限纵横比的多孔板中捕获了再循环区域的某些关键维度，以及孔隙率范围\ ks {在其上存在}时，它存在于其时，当时不存在或被抑制。该模型用于解释为什么再循环区域（i）出现，（ii）随着碱基出血的增加，（iii）在临界出血时消失了，（iii）在临界出血时消失，并且（iv）对雷诺数数量的变化不敏感。该模型预测与实验室实验和数值模拟的数据相当一致。存在。该预测与实验室实验和数值模拟的数据相当一致。
The appearance of detached recirculation regions in wakes with base bleed determines the aerodynamic properties of many natural organisms and technological applications. In this work we introduce an analytical model which captures certain key dimensions of the recirculation region in the wake of porous plates of infinite aspect ratio, along with the porosity range \ks{over which} it exists, when vortex shedding is absent or suppressed. The model is used to interpret why the recirculation region (i) emerges, (ii) migrates away from the body with increasing base bleed, (iii) disappears at a critical bleed and (iv) is partially insensitive to variations in the Reynolds number. The model predictions show considerable agreement with data from laboratory experiments and numerical simulations. exists. The predictions show considerable agreement with data from laboratory experiments and numerical simulations.
