The Influence of Roughness on a High-Pressure Steam Turbine Stage: An Experimental and Numerical Study
The Influence of Roughness on a High-Pressure Steam Turbine Stage: An Experimental and Numerical Study
复制标题
DOI：
10.1115/1.4028205
复制
发表时间：
2014-06
影响因子：
1.5
通讯作者：
J. Bellucci;F. Rubechini;M. Marconcini;A. Arnone;Lorenzo Arcangeli;N. Maceli;V. Dossena
中科院分区：
文献类型：
--
作者：
J. Bellucci;F. Rubechini;M. Marconcini;A. Arnone;Lorenzo Arcangeli;N. Maceli;V. Dossena
本文研究粗糙度对高压涡轮机级的影响。本报告分为三个部分。在第一个，一个实验活动的线性叶栅，其中叶片损失测量不同值的表面粗糙度和实际感兴趣的雷诺数的范围内。第二部分是专门的数值方法的基本方面，包括用于计算的粗糙度模型的详细讨论。然后，根据测量结果对这些模型的保真度进行测试，从而允许对其进行微调并证明其可靠性。最后，进行了全面的计算流体动力学（CFD）分析的高压级，以调查粗糙度的损失在整个阶段的操作包线的影响。考虑了可能影响粗糙度影响的非定常效应，如即将出现的转子叶片尾迹，并讨论了过渡相关方面对损失的影响。
This work deals with the influence of roughness on high-pressure steam turbine stages. It is divided in three parts. In the first one, an experimental campaign on a linear cascade is described, in which blade losses are measured for different values of surface roughness and in a range of Reynolds numbers of practical interest. The second part is devoted to the basic aspects of the numerical approach and consists of a detailed discussion of the roughness models used for computations. The fidelity of such models is then tested against measurements, thus allowing their fine-tuning and proving their reliability. Finally, comprehensive computational fluid dynamics (CFD) analysis is carried out on a high-pressure stage, in order to investigate the influence of roughness on the losses over the entire stage operating envelope. Unsteady effects that may affect the influence of the roughness, such as the upcoming wakes on the rotor blade, are taken into account, and the impact of transition-related aspects on the losses is discussed.