| 不同攻角时等高型陷落腔流激振荡特性研究 |
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| 引用本文： | 戴绍仕,姚熊亮.不同攻角时等高型陷落腔流激振荡特性研究[J].中国造船,2011,52(1). |
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| 作者姓名： | 戴绍仕 姚熊亮 |
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| 作者单位： | 哈尔滨工程大学,船舶工程学院,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金(11002038) |
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| 摘 要： | 针对均匀流场中三维等高型陷落腔因分离流而产生的流激振荡问题开展了系列的实验研究。实验过程中分别考虑了来流攻角为0°和15°时、雷诺数变化范围(Re=2.06.105～1.16.106)时三维等高型陷落腔的流激振荡特性。实验中分别测量了三维腔体侧壁周向及垂向流体压力,在分析腔体内稳态压力和脉动压力的周向、垂向分布规律及腔口剪切层自持振荡特性的基础上,研究了攻角对流体压力分布和剪切层振荡频率特性的影响。实验结果表明:均匀流场中三维陷落腔内部压力分布复杂且当雷诺数大于某值时腔体内稳态压力全都呈现出负压,同时来流攻角的增加使腔口导边、随边和腔体内稳态压力明显地减小,顶流点处的稳态压力随相对高度增加先减小后增大。攻角的增加使剪切层振荡频率减小,但并未影响剪切层振频无量纲St数随流速的变化规律。
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| 关 键 词： | 船舶、舰船工程 等高型陷落腔 不同来流攻角 流激振荡 实验研究 |
Research on the Chrematistics of Fluid induced Oscillation of 3D Square Cave-in Cavity at Different Attack Angle |
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| Dai Shaoshi,Yao Xiongliang.Research on the Chrematistics of Fluid induced Oscillation of 3D Square Cave-in Cavity at Different Attack Angle[J].Shipbuilding of China,2011,52(1). |
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| Authors: | Dai Shaoshi Yao Xiongliang |
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| Institution: | Dai Shaoshi,Yao Xiongliang (College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | Aiming at fluid induced oscillation problem of 3D square cave-in cavity induced by separation flow in uniform,a series of physical experiments are carried out.The experiment discusses the characteristics of flow induced oscillation of three-dimensional cave-in cavity considering different flow attack angle and incoming velocity(Reynolds number range is from 2.06E5 to 1.16E6).In the experiment circumferential and vertical fluid pressure along the open cavity are measured,meanwhile,based on the study of stead... |
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| Keywords: | ship engineering square cave-in cavity incoming flow of different attack angle fluid induced oscillation |
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