CFD Prediciton of Maximum Lift Effects on Realistic High-Lift-Commercial-Aircraft-Configurations within the European project EUROLIFT II

TLDR

The study aims to evaluate CFD’s ability to predict high‑lift performance dependence on Reynolds number and to deepen understanding of vortex phenomena, particularly nacelle strake effects, by presenting key results from Subtask 2.1.3 and comparing predictions with wind‑tunnel data. The computations were carried out collaboratively by five European institutions as part of Subtask 2.1.3 of EUROLIFT II. Extensive numerical polar computations were performed for three progressively complex stages of the KH3Y aircraft configuration within EUROLIFT II.

Abstract

Within the framework of the European project EUROLIFT II extensive numerical polar computations for three different stages of gradually increased geometrical complexity of the KH3Y aircraft configuration have been conducted. These challenging computations were performed through the complementary work of five different European institutions. The main objectives of these activities are the assessment of the capabilities of CFD to predict the dependence of the high-lift performance on the Reynolds number and to further improve the understanding of the high-lift associated vortex phenomena, especially the nacelle strake mechanism. The paper will present the key results and the main achievements, as obtained through the challenging research work assigned to Subtask 2.1.3 of the EUROLIFT II project. The focus will be put on the discussion on the aerodynamic phenomena underlined by the comparison of prediction and wind tunnel measurements.