论文标题
轴对称湍流射流的相似性缩放
Similarity scaling of the axisymmetric turbulent jet
论文作者
论文摘要
在当前的工作中，我们发现空气中的自由轴对称喷气机在射流的完全开发的部分中显示自相似性。我们报告了使用激光多普勒速度测量器执行的轴向速度分量的第一，第二和三阶的准确测量，包括在射流的外部（高强度）区域。将测量值与从单独出版物中描述的简单喷气模型得出的预测进行了比较，我们讨论了对自由喷气机中对自相似性的进一步研究的影响。看来，本研究中包含的所有统计功能都可以用单个几何缩放因子（与常见虚拟起源的下游距离）进行缩放。
In the current work, we find that a free axisymmetric jet in air displays self-similarity in the fully developed part of the jet. We report accurate measurements of first, second and third order, spatially averaged statistical functions of the axial velocity component performed with a laser Doppler anemometer, including in the outer (high intensity) regions of the jet. The measurements are compared to predictions derived from a simple jet model, described in a separate publication, and we discuss the implications for the further study of self-similarity in a free jet. It appears that all statistical functions included in this study can be scaled with a single geometrical scaling factor -- the downstream distance from a common virtual origin.
