Browsing by Author "Da Ronch, Andrea"

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    Implicit and conventional large eddy simulation of flow around a circular cylinder at Reynolds number of 3900
    (AIAA, 2024-01-04) Li, Zhuoneng; Da Ronch, Andrea; Rana, Zeeshan A.; Jenkins, Karl W.
    The implicit Large Eddy Simulation (iLES) incorporating an unstructured 3rd-order Weighted Essential Non-Oscillatory (WENO) reconstruction method and the conventional Large Eddy Simulation with Wall Adapting Local Eddy-Viscosity (WALE) are investigated on the flow around a circular cylinder at a Reynolds number of 3900. Simulations are carried out in the framework of open-source package OpenFOAM with a 2nd-order Euler implicit time integration and Pressure-Implicit Splitting-Operator (PISO) algorithm is used for the pressure-velocity coupling. The results are compared to the high fidelity experiment and DNS data, and demonstrated a favourable performance for iLES with a 3rd-order WENO scheme on the instantaneous flow structure. The conventional LES on the prediction of mean surface pressure coefficient and velocity profiles on the wake can be beneficial by reducing the effect of Rhie-Chow interpolation. The spectral analysis reveals that the current simulations are also capturing Von Karman shedding frequencies and shear layer frequencies. Finally, distinct features of iLES and LES are discussed.
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    A review of modelling and analysis of morphing wings
    (Elsevier, 2018-06-20) Li, Daochun; Zhao, Shiwei; Da Ronch, Andrea; Xiang, Jinwu; Drofelnik, Jernej; Li, Yongchao; Zhang, Lu; Wu, Yining; Kintscher, Markus; Monner, Hans Peter; Rudenko, Anton; Guo, Shijun; Yin, Weilong; Kirn, Johannes; Storm, Stefan; De Breuker, Roeland
    Morphing wings have a large potential to improve the overall aircraft performances, in a way like natural flyers do. By adapting or optimising dynamically the shape to various flight conditions, there are yet many unexplored opportunities beyond current proof-of-concept demonstrations. This review discusses the most prominent examples of morphing concepts with applications to two and three-dimensional wing models. Methods and tools commonly deployed for the design and analysis of these concepts are discussed, ranging from structural to aerodynamic analyses, and from control to optimisation aspects. Throughout the review process, it became apparent that the adoption of morphing concepts for routine use on aerial vehicles is still scarce, and some reasons holding back their integration for industrial use are given. Finally, promising concepts for future use are identified.