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Evaluation of CFD methods for transport aircraft high lift systems

机译：评估运输机高升力系统的CFD方法

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摘要

Major results and findings of the numerical work package of the European high lift programme EUROLIFT are outlined. The main objective of these studies is to validate and test numerical methods for the prediction of high lift flows for transport aircraft configurations. The activities comprise the assessment of current CFD methods for 3D flows, evaluation of means for code improvement, and transition prediction. All aspects are especially devoted to high lift flow problems. A general capability to predict maximum lift on a simplified wing/fuselage high lift configuration is demonstrated by a variety of different numerical approaches. In general, major shortcomings are the reliability and the accurate simulation of large separation areas and the turn-around time to compute 3D lift polars. Advanced turbulence modelling and numerical solver features, such as the preconditioning technique, show a potential to overcome these deficiencies. Promising results with respect to transition prediction were obtained on a swept high lift wing using a database method. The results obtained in the numerical activities represent major ingredients on the way to a consistent numerical approach for the simulation of transport aircraft high lift configurations including all maximum lift determining effects.
机译：概述了欧洲高升程计划EUROLIFT的数值工作包的主要结果和发现。这些研究的主要目的是验证和测试用于预测运输机配置的高升流的数值方法。这些活动包括评估当前用于3D流程的CFD方法，评估代码改进手段以及过渡预测。所有方面都专门针对高扬程流量问题。通过各种不同的数值方法，可以证明在简化的机翼/机身高升力配置下预测最大升力的一般能力。通常，主要缺点是大分隔区域的可靠性和精确仿真以及计算3D提升极的周转时间。先进的湍流建模和数值求解器功能（例如预处理技术）显示了克服这些缺陷的潜力。关于过渡预测的有希望的结果是使用数据库方法在后掠高升机翼上获得的。在数值活动中获得的结果代表了通向用于仿真运输机高升力配置（包括所有最大升力确定效果）的一致数值方法的主要成分。

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