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首页> 外文期刊>Energy Conversion & Management >Computational and experimental investigation of the aerodynamics and aeroacoustics of a small wind turbine with quasi-3D optimization
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Computational and experimental investigation of the aerodynamics and aeroacoustics of a small wind turbine with quasi-3D optimization

机译：具有准3D优化的小型风力涡轮机的空气动力学和空气声学计算和实验研究

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摘要

Aerodynamics and aeroacoustics of a small horizontal axis wind turbine are investigated experimentally and computationally. The purpose has been to develop a procedure to predict and optimize the aerodynamic and aeroacoustic performance of such turbines. Aeroacoustic measurements are performed by an acoustic camera, while monitoring the plant's power output. In the computational analysis, an unsteady, 3D analysis is applied, modelling the turbulence by the Improved Delayed Detached Eddy Simulation (IDDES), and the aeroacoustics by the Ffowcs Williams and Hawkings (FW-H) approach. In the first part of the study, the original turbine blade is analyzed. A satisfactory agreement between the predictions and measurements is observed for the power conversion efficiency and the emitted sound. In the second part, the aerodynamics of the blade is optimized computationally, in the sense of a Quasi-3D approach, by a previously developed automated procedure. In this part, where a large number of 2D blade profiles are analyzed and optimized, a Reynolds Averaged Numerical Simulation approach is adopted for turbulence. In the third part, it is computationally verified (IDDES, FW-H) that the 3D blade, re-constructed based on the Quasi-3D optimization, exhibits a higher efficiency and lower sound emission. It is shown that the latter holds not only for the overall sound pressure, but also for the criteria pertaining to human perception of sound. Application of high-resolution methods with verification by on-site measurements, demonstration of the proposed Quasi-3D optimization procedure to lead to improved aerodynamic and aeroacoustic performance are innovative aspects of the present investigation. The presented, validated procedure can be applied to predict and improve the aerodynamic and aeroacoustic performance of small horizontal axis wind turbines.
机译：通过实验和计算研究了小型水平轴风力发电机的空气动力学和空气声学特性。目的是开发一种程序来预测和优化这种涡轮机的空气动力学和空气声学性能。航空声学测量由声学摄像机执行，同时监视工厂的功率输出。在计算分析中，应用了不稳定的3D分析，通过改进的延迟分离涡流模拟（IDDES）对湍流建模，并通过Ffowcs Williams和Hawkings（FW-H）方法对空气声学进行建模。在研究的第一部分中，对原始涡轮叶片进行了分析。对于功率转换效率和发出的声音，可以观察到预测和测量之间令人满意的一致性。在第二部分中，按照准3D方法，通过先前开发的自动化程序在计算上优化了叶片的空气动力学性能。在这一部分中，在分析和优化大量2D叶片轮廓的过程中，采用了雷诺平均数值模拟方法来进行湍流。在第三部分中，通过计算验证（IDDES，FW-H），基于准3D优化重建的3D叶片具有更高的效率和更低的声音发射。结果表明，后者不仅适用于总体声压，而且适用于与人类对声音的感知有关的标准。高分辨率方法的应用与现场测量的验证，拟议的Quasi-3D优化程序的论证以导致改进的空气动力学和空气声学性能是本研究的创新内容。提出的，经过验证的程序可用于预测和改善小型水平轴风力涡轮机的空气动力学和空气声学性能。

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