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Turbulent Flowfield Analysis in a Bluff-Body Burner Using PIV

机译:基于PIV的钝体燃烧器湍流流场分析

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The structure of inert turbulent flows, stabilized in a Bluff-Body burner, is studied considering different volumetric flows for Nitrogen jet and annular air in coflow configuration. Flowfield analysis on Bluff-Body burner is essential to improve the knowledge about this burner, which plays an important role in industrial applications. Thus, vector velocity field is performed, employing Particle Image Velocimetry technique. Also, an uncertainty analysis is performed considering parameters involved in this technique yielding 6% to velocity measurements. The acquired information produces the results based in flowfield structure, which are presented in terms of statistical momentum and Reynolds stress, in which Boussinesq Hypothesis is considered to incompressible flows. However, this hypothesis fails in certain conditions. In this way, is possible to comprehend and provide experimental data from the turbulent effects on the flowfield and also contribute to predict the combustion flows, in order to enable the validation and develop numerical models.
机译:研究了在布拉夫-鲍迪燃烧器中稳定的惰性湍流的结构,考虑了氮气流和环形气流在同流状态下的不同体积流量。 Bluff-Body燃烧器的流场分析对于提高对该燃烧器的了解至关重要,这在工业应用中起着重要作用。因此,利用粒子图像测速技术来执行矢量速度场。同样,进行不确定性分析时要考虑该技术中涉及的参数,从而使速度测量值占6%。所获得的信息产生基于流场结构的结果,这些结果以统计动量和雷诺应力表示,其中Boussinesq假说被认为是不可压缩的流。但是,该假设在某些情况下会失败。这样,就有可能从流场上的湍流效应中理解并提供实验数据,并且有助于预测燃烧流量,从而能够进行验证并建立数值模型。

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