仿鲨鱼鳃部射流减阻特性的仿真研究

doi:10.3969/j.issn.1000-1093.2012.10.012

兵工学报 ›› 2012, Vol. 33 ›› Issue (10): 1230-1236.doi: 10.3969/j.issn.1000-1093.2012.10.012

仿鲨鱼鳃部射流减阻特性的仿真研究

谷云庆¹，赵刚¹，赵华琳¹，郑金兴¹，王飞¹，肖磊²，刘文博¹

(1.哈尔滨工程大学机电工程学院, 黑龙江哈尔滨 150001；2.大庆油田责任有限公司矿区服务事业部黑龙江大庆 163000)

收稿日期:2009-12-23 修回日期:2009-12-23 上线日期:2014-03-04
作者简介:谷云庆(1982—)，男，博士研究生
基金资助:
国家自然科学基金项目（51275102）；中央高校基本科研业务费专项资金项目（HEUCF110702）；哈尔滨市科技创新人才研究专项（159070220011）

Simulation Study on Drag Reduction Characteristics of Bionic Jet Flow Based on Shark Gill

GU Yun-qing¹, ZHAO Gang¹, ZHAO Hua-lin¹, ZHENG Jin-xing¹, WANG Fei¹, XIAO Lei², LIU Wen-bo¹

(1.College of Mechanical and Electrical Engineering，Harbin Engineering University, Harbin 150001, Heilongjiang, China;2.Mining Area Service Enterprise Department, Daqing Oil Field Company Ltd, Daqing 163000, Heilongjiang, China)

Received:2009-12-23 Revised:2009-12-23 Online:2014-03-04

摘要/Abstract

摘要： 针对鲨鱼鳃部射流表面流场特性针对鲨鱼鳃部射流表面流场特性建立了基于鲨鱼鳃部特征的仿生射流模型，采用数值模拟方法，在主流场入口速度为3 m/s、射流速度为0.02~1 m/s条件下，研究仿鲨鱼鳃部射流的减阻特性、分析其减阻机理。研究结果表明：当射流速度u＞0.1 m/s时，仿鲨鱼鳃部射流具有减阻效果，且减阻率随射流速度增大而增大。仿鲨鱼鳃部射流通过影响摩擦阻力和压差阻力改变减阻特性。仿鲨鱼鳃部射流对摩擦阻力的影响机理为：射流出口下游流场黏性底层增厚、速度梯度降低；同时形成反向旋涡，使流场存在稳定的大涡结构，降低了湍流脉动对壁面的作用。对压差阻力的影响机理为：射流速度作为一种附加动力，对压差阻力产生抑制效应，导致了模型压差阻力的下降。

关键词: 工程仿生学, 射流, 减阻, 减阻机理, 数值模拟

Abstract: A bionic jet model based on the feature of shark gill was established for the characteristics of flow field on the bionic jet surface. The drag reduction characteristics and drag reduction mechanisms of bionic jet flow based on shark gill were studied using numerical simulation method at the main flow field velocity of 3 m/s and the jet velocity of 0.02~1 m/s. The results show that: the bionic jet flow based on shark gill has a drag reduction effect when the jet velocity u is more than 0.1 m/s, and the drag reduction rate increases with jet velocity. The bionic jet flow based on shark gill affects the drag reduction characteristics of model by changing the frictional resistance and pressure drag. The mechanism of bionic jet flow influencing on frictional resistance is that the thickness of viscous sublayer at the downstream of jet outlet increases and the velocity gradient reduces. And a reverse eddy forms, which makes the flow field have a stable large vortex structure and reduce the influence of turbulent fluctuation on the wall. The mechanism of bionic jet flow influencing on pressure drag is that the jet velocity, as an additional power, inhibits the differential pressure resistance, resulting in its decline.

Key words: engineering bionics, jet flow, drag reduction, drag reduction mechanism, numerical simulation

中图分类号:

TB17

谷云庆，赵刚，赵华琳，郑金兴，王飞，肖磊，刘文博. 仿鲨鱼鳃部射流减阻特性的仿真研究[J]. 兵工学报, 2012, 33(10): 1230-1236.

GU Yun-qing, ZHAO Gang, ZHAO Hua-lin, ZHENG Jin-xing, WANG Fei, XIAO Lei, LIU Wen-bo. Simulation Study on Drag Reduction Characteristics of Bionic Jet Flow Based on Shark Gill[J]. Acta Armamentarii, 2012, 33(10): 1230-1236.

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仿鲨鱼鳃部射流减阻特性的仿真研究

Simulation Study on Drag Reduction Characteristics of Bionic Jet Flow Based on Shark Gill

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