A New Stall-Onset Criterion for Low Speed Dynamic-Stall
A New Stall-Onset Criterion for Low Speed Dynamic-Stall
复制标题
低速动态失速的新失速开始准则
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
F. Coton
中科院分区：
文献类型：
--
作者：
W. Sheng;R. Galbraith;F. Coton
Beddoes/Leishman动态失速模型已成为提供嵌入在更大代码中的非定常翼型数据的最流行的模型之一。潜在的建模哲学是，它应该基于对相关物理现象的最佳理解或描述。尽管该模型以流动物理为指导，但它需要以测量系数和常数的形式提供重要的经验输入。Beddoes提供了这些马赫数范围为0.3-0.8。本文考虑了马赫数为0.12时的一个这样的输入，其中，从格拉斯哥数据可以看出，当前的失速开始准则和随后的调整产生了有问题的结果。在该模型的最佳传统基础上，提出并发展了一种新的失速判据。它被证明是非常有能力重建格拉斯哥失速开始的数据，斜坡和振荡测试。
The Beddoes/Leishman dynamic-stall model has become one of the most popular for the provision of unsteady aerofoil data embedded in much larger codes. The underlying modeling philosophy was that it should be based on the best understanding, or description, of the associated physical phenomena. Even though the model was guided by the flow physics, it requires significant empirical inputs in the form of measured coefficients and constants. Beddoes provided these for a Mach number range of 0.3–0.8. This paper considers one such input for a Mach number of 0.12, where, from the Glasgow data, it is shown that the current stall-onset criterion, and subsequent adjustments, yield problematic results. A new stall criterion is proposed and developed in the best traditions of the model. It is shown to be very capable of reconstructing the Glasgow’s data for stall onset both the ramp-up and oscillatory tests.