Correlation-Based Riblet Model for Turbomachinery Applications
Correlation-Based Riblet Model for Turbomachinery Applications
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DOI：
10.1115/1.4035605
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发表时间：
2016-06
影响因子：
1.7
通讯作者：
Viktor Koepplin;Florian Herbst;J. Seume
中科院分区：
文献类型：
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作者：
Viktor Koepplin;Florian Herbst;J. Seume
本文提出了一种适用于制造V形和梯形肋的经验肋模型。实施的riblet效应采用了基于相关性的校正的阻尼的特定耗散率ω在附近的墙壁，这是以前提出的其他研究人员。在目前的文件中的相关性扩展到阻力增加的制度，并扩展到占肋相对于流量的不对准的影响和不利的压力梯度的影响。为了解释后者在现代，大规模并行CFD代码，一个本地Clauser参数已新派生。该模型在三维气动设计程序TRACE中实现，并通过平板测量数据和NACA 6510压气机叶栅进行了验证。实验值的预测值与实验数据非常吻合，表明该模型能够用于设计肋片结构的涡轮叶片。Copyright © 2016 by ASME
An empirical riblet model for manufactured V-shaped and trapezoidal riblets which is suitable for turbomachinery application is presented. The implementation of the riblet effect employs a correlation-based correction for the damping of the specific dissipation rate omega in the vicinity of the wall which has been previously presented by other researchers. In the current paper the correlations are extended into the drag-increasing regime and are extended to account for the effect of misalignment of the riblets relative to the flow and for the effect of adverse pressure gradients. In order to account for the latter in modern, massive parallel CFD-codes, a local Clauser-Parameter has been newly derived. The model is implemented in the 3D turbomachinery design code TRACE and validated with flat plate measurement data and a NACA6510 compressor cascade. The predictions of the experimental values are in very good agreement with the experimental data, showing the capability of the model for designing riblet structured turbomachinery blading.Copyright © 2016 by ASME