谱和小波分析在尾迹与轮尼皮瓣翼型

IF 0.3 4区 工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria Pub Date : 2023-01-01 DOI:10.23967/j.rimni.2023.03.001
P. Giacopinelli, A. Scarabino, F. Bacchi, J. Delnero
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引用次数: 0

摘要

在这项工作中,我们确定在一个HQ 17翼型的下风尾迹连贯的涡流与轮格尼皮瓣。这种高升力装置由一个小板垂直于翼型,在或接近后缘,与从1%到4%的和弦的顺序的高度。整体效果是产生一个显着增加升力,与相对较小的增加翼型阻力在一起。它的几何形状产生空间尺度H的涡脱落,从而调节尾迹,从而影响流动的整体构型。利用商业软件ANSYS Fluent进行了数值研究。同时,在拉普拉塔国立大学工程学院航空系区风洞进行了实验。利用Dantec流线热线风速计,获得了翼型尾迹中瞬时水平和垂直速度分量的记录。利用连续小波变换技术对实验数据和数值模拟数据进行分析,以识别和表征尾迹中的相干涡。结果显示了周期性脱落的脱落涡结构和组织程度。
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Spectral and wavelet analysis in the wake of an airfoil with Gurney flap
In this work we identify the coherent vortices in the leeward wake of an HQ 17 airfoil with a Gurney flap. This high-lift device consists of a small plate perpendicular to the airfoil, at or near the trailing edge, with a height � of the order from 1% to 4% of the chord. The overall effect is to produce a significant increase in lift, together with a relatively minor increase in airfoil drag. Its geometry generates vortex shedding of spatial scale H, which modulates the wake and thus influence the global configuration of the flow. A numerical study was performed with the commercial software ANSYS Fluent. Simultaneously, experiments were carried out in the wind tunnel of the Aeronautical Departmental Area from the Engineering School of the National University of La Plata. With a Dantec StreamLine hot-wire anemometer, records of the instantaneous horizontal and vertical velocity components in the airfoil wake were obtained. Both the experimental data and those obtained by numerical simulation were analyzed with the continuous wavelet transform technique, in order to identify and characterize the coherent vortices in the wake. Results show the shed vortices structure and the organization degree of this periodic shedding.
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来源期刊
CiteScore
0.70
自引率
0.00%
发文量
26
审稿时长
6 months
期刊介绍: International Journal of Numerical Methods for Calculation and Design in Engineering (RIMNI) contributes to the spread of theoretical advances and practical applications of numerical methods in engineering and other applied sciences. RIMNI publishes articles written in Spanish, Portuguese and English. The scope of the journal includes mathematical and numerical models of engineering problems, development and application of numerical methods, advances in software, computer design innovations, educational aspects of numerical methods, etc. RIMNI is an essential source of information for scientifics and engineers in numerical methods theory and applications. RIMNI contributes to the interdisciplinar exchange and thus shortens the distance between theoretical developments and practical applications.
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