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首页> 外文期刊>AIAA Journal >Flat-Plate Drag Reduction with Streamwise Noncontinuous Microblowing
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Flat-Plate Drag Reduction with Streamwise Noncontinuous Microblowing

机译：沿流不连续微吹的平板减阻

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摘要

The efficiency of air microblowing through a wall consisting of alternating permeable and impermeable sections to reduce the turbulent skin-friction drag of a fiat plate in a nominally gradientless incompressible flow was studied experimentally. The mass flow rate of the air per unit area was varied in the range from 0 to 0.0709 kg/s/m~2, which corresponds to the maximum blowing coefficient equal to 0.00287. In the previous study of the authors (Kornilov, V. I., and Boiko, A. V., "Efficiency of Air Microblowing Through Microperforated Wall for Flat Plate Drag Reduction," AIAA Journal, Vol. 50, No. 3,2012, pp. 724-732.), it was found in particular that there exists a wide flow region of reduced skin friction downstream from the microperforated insert Therefore, the main attention in the present study is paid to distributed boundary-layer characteristics and efficiency of the given control technique supplemented with forced impermeable surface sections to reduce energy cost Excluding the impermeable sections, a consistent reduction of the skin-friction coefficient along the chord of the perforated insert was found, the reduction achieving 71% at maximum value of the blowing coefficient It is also shown that the microblowing with the same airflow rate as at completely permeable surface is able to provide the flat-plate total drag reduction of about 15-25%.
机译：实验研究了通过壁的微吹风效率，该壁由交替的可渗透部分和不可渗透部分组成，以减少名义上无梯度的不可压缩流动中的平整板的湍动皮肤摩擦阻力。每单位面积的空气质量流量在0到0.0709 kg / s / m〜2的范围内变化，对应于最大吹气系数等于0.00287。在作者的先前研究中（Kornilov，VI和Boiko，AV，“通过微孔壁进行空气微吹以减少平板阻力的效率”，AIAA杂志，第50卷，第3期，2012年，第724-732页） ），特别是在微孔插入物的下游发现了一个减小皮肤摩擦的较宽的流动区域，因此，本研究的主要关注点是分布式边界层特性和给定控制技术的有效补充。强制不透水表面部分以降低能源成本除不透水部分外，沿着穿孔刀片的弦线，皮肤摩擦系数一直降低，在吹塑系数的最大值处降低了71％。与完全可渗透表面具有相同气流速率的微吹能够使平板的总风阻降低约15-25％。

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  • 来源
    《AIAA Journal》 |2014年第1期|93-103|共11页
  • 作者

    Vladimir I. Komilov; Andrey V. Boiko;

  • 作者单位

    Russian Academy of Sciences, 630090 Novosibirsk, Russia,Department of Experimental Aerogasdynamics, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch;

    Russian Academy of Sciences, 630090 Novosibirsk, Russia,Department of Experimental Aerophysical Studies of Subsonic Flows, Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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