Analysis of an Oscillating Airfoil in a Power-Extraction Regime Based on the Compressible Navier-Stokes Equations With Low-Speed Preconditioning
Analysis of an Oscillating Airfoil in a Power-Extraction Regime Based on the Compressible Navier-Stokes Equations With Low-Speed Preconditioning
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DOI：
10.1115/gt2012-68265
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
M. Campobasso;J. Drofelnik
中科院分区：
文献类型：
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作者：
M. Campobasso;J. Drofelnik
同时起伏和俯仰的机翼可以从迎面而来的气流中提取能量。空气动力学和该装置的理论性能之间的关系在这里研究通过与时间相关的层流模拟与研究可压缩Navier-Stokes方程求解器进行。所提出的分析证实了其他研究的结果，即该装置的功率提取效率可以达到34%，这是由于强动态失速的有利影响。考虑到航空声学应用，所开发的流场求解器使用可压缩Navier-Stokes方程，并经过仔细优化的低速预处理。为了证明这种方法的建模能力和高计算性能，能量提取装置的非定常空气动力学通过使用具有计算挑战性的自由飞行马赫数0.001来模拟。这项研究新奇一个基本要素是对所提出的方法进行全面评估，部分基于与振荡翼装置相关的挑战性和现实问题。
A wing that is simultaneously heaving and pitching may extract energy from an oncoming air flow. The relationship between the aerodynamics and the theoretical performance of this device is here investigated by means of time-dependent laminar flow simulations performed with a research compressible Navier-Stokes solver. The presented analyses confirm the findings of other studies that the efficiency of the power extraction of this device can reach 34%, due to the favourable effects of a strong dynamic stall. In view of aeroacoustic applications, the developed flow solver uses the compressible Navier-Stokes equations with carefully optimized low-speed preconditioning. To demonstrate the modeling capabilities and the high computational performance of this approach, the unsteady aerodynamics of the energy-extracting device is simulated by using a computationally challenging freestream Mach number of 0.001. A fundamental element of novelty of this study is a thorough assessment of the proposed approach partly based on the challenging and realistic problem associated with the oscillating wing device.Copyright © 2012 by ASME