Numerical investigation of geometrical corrugation influence to vortex flowfields at low Reynolds number

IF 0.7 Q4 MECHANICS

Journal of Fluid Science and Technology Pub Date : 2019-01-01 DOI:10.1299/jfst.2019jfst0018

Y. Yamaguchi, D. Sasaki, M. Okamoto, K. Shimoyama, S. Obayashi

引用次数: 1

Abstract

Micro Air Vehicle (MAV) are often utilized for the disaster spot, ecosystem observation and topography investigation these days. Because the full length of the body is centimeter scale, the Reynolds number of MAV becomes low (10-10). A laminar separation bubble is formed in low Reynolds number unlike a high Reynolds number domain because the viscous term becomes dominant. Numerical and experimental analysis of high performance airfoils in low Reynolds number flow is proposed (M. Anyoji et al., 2014). In low Reynolds number flows, flat plate or thin wings have better aerodynamic performance compared to thick streamlined airfoils. However, there are still many problems with related to the aerodynamic performance. For example, batteries tend to be heavy and the thrust is not sufficient in low Reynolds number. These results would be useful in designing low Reynolds number aircraft such as micro-air vehicles. For example, an insect-sized MAV was proposed by (Wood et al., 2012) and (Kroo and Kunz., 2001).

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几何波纹对低雷诺数涡旋流场影响的数值研究

微型飞行器(MAV)在灾害现场观测、生态系统观测和地形调查等领域得到广泛应用。由于机体全长为厘米尺度，MAV的雷诺数较低(10-10)。由于粘滞项占主导地位，在低雷诺数域中形成层流分离泡，而在高雷诺数域中形成层流分离泡。提出了低雷诺数下高性能翼型的数值和实验分析(M. Anyoji et al.， 2014)。在低雷诺数流动中，平板或薄翼比厚流线型翼型具有更好的气动性能。然而，在气动性能方面仍存在许多问题。例如，在低雷诺数下，电池往往很重，推力不足。这些结果对低雷诺数飞行器如微型飞行器的设计有一定的参考价值。例如，(Wood et al.， 2012)和(Kroo and Kunz)提出了昆虫大小的MAV。, 2001)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Fluid Science and Technology MECHANICS-

CiteScore

1.00

自引率

12.50%

发文量

期刊介绍： Journal of Fluid Science and Technology (JFST) is an international journal published by the Fluids Engineering Division in the Japan Society of Mechanical Engineers (JSME). JSME had been publishing Bulletin of the JSME (1958-1986) and JSME International Journal (1987-2006) by the continuous volume numbers. Considering the recent circumstances of the academic journals in the field of mechanical engineering, JSME reorganized the journal editorial system. Namely, JSME discontinued former International Journals and projected new publications from the divisions belonging to JSME. The Fluids Engineering Division acted quickly among all divisions and launched the premiere issue of JFST in January 2006. JFST aims at contributing to the development of fluid engineering by publishing superior papers of the scientific and technological studies in this field. The editorial committee will make all efforts for promoting strictly fair and speedy review for submitted articles. All JFST papers will be available for free at the website of J-STAGE (http://www.i-product.biz/jsme/eng/), which is hosted by Japan Science and Technology Agency (JST). Thus papers can be accessed worldwide by lead scientists and engineers. In addition, authors can express their results variedly by high-quality color drawings and pictures. JFST invites the submission of original papers on wide variety of fields related to fluid mechanics and fluid engineering. The topics to be treated should be corresponding to the following keywords of the Fluids Engineering Division of the JSME. Basic keywords include: turbulent flow; multiphase flow; non-Newtonian fluids; functional fluids; quantum and molecular dynamics; wave; acoustics; vibration; free surface flows; cavitation; fluid machinery; computational fluid dynamics (CFD); experimental fluid dynamics (EFD); Bio-fluid.