Numerical investigation on flow behavior and heat transfer feature of flexible wings located at the bottom of a two-dimensional channel. (April 2022)

• Record Type: Journal Article
• Authors: Jiansheng, Wang; Xin, Wang; Xueling, Liu
• Is Part Of: Applied thermal engineering. Volume 206(2022)
• Publication Date: 2022-04
• Subjects: Flexible wing -- Motion mode -- Transition -- Over performance coefficient; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2022.118112
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Three motion modes of the flexible wings are found. There is a remarkable interaction of front and rear flexible wings. Performance coefficient reaches peak as motion mode of rear flexible wings varies. Performance coefficient has a peak under specific condition. Abstract: The flow behavior and heat transfer feature in a two-dimensional channel with flexible wings are numerically investigated in present work. Furthermore, the influences of Young's modulus of wings and Reynolds number on the fluid flow behavior and heat transfer performance are probed. In addition, the dynamic behavior of flexible wings is explored as well. The results indicate that three motion modes of flexible wings occur, which are deflection mode, vibration mode and flapping mode. The numerical results indicate that the larger the Young's modulus, the larger Reynolds number is required for the emergence of the motion mode transition. The overall performance coefficient (PEC) is used to measure the comprehensive performance of flexible wings. It is found that PEC peaks occur near the rear flexible wing when the motion mode transition appears. In specific case, PEC increases by up to 1.145 under the combination effects of front flexible wing blocking and rear flexible wing flapping.