A minimum-domain impulse theory for unsteady aerodynamic force with discrete wake

Theoretical and Applied Mechanics Letters

Luoqin Liu¹  Weidong Su²  Jiezhi Wu²  Linlin Kang² 

[1] Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China;State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China;

关键词: Minimum-domain;    Impulse theory;    Discrete wake;    Lamb vector;   

DOI  :  10.1016/j.taml.2017.11.003

来源: DOAJ

【 摘 要 】

We extend the impulse theory for unsteady aerodynamics, from its classic global form to finite-domain formulation, then to a minimum-domain version for discrete wake. Each extension has been confirmed numerically. The minimum-domain theory indicates that the numerical finding of Li and Lu (2012) is of general significance: The entire force is completely determined by only the time rate of impulse of those vortical structures still connecting to the body, along with the Lamb-vector integral thereof that captures the contribution of all the rest disconnected vortical structures.

【 授权许可】

Unknown