| 加热对圆柱绕流影响的热线测量 |
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| 引用本文： | 蒋小勤,董宇飞,魏中磊,郑学龄,杜先之. 加热对圆柱绕流影响的热线测量[J]. 海军工程大学学报, 1997, 0(2) |
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| 作者姓名： | 蒋小勤 董宇飞 魏中磊 郑学龄 杜先之 |
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| 作者单位： | 海军工程学院基础部(蒋小勤，郑学龄)，北京大学(董宇飞，魏中磊)，海军工程学院基础部(杜先之) |
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| 基金项目： | 国家自然科学基金重点项目资助 |
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| 摘 要： | 首次给出了风洞中加热圆柱涡脱落受加热功率控制的热线测量结果。实验表明:当Re>Re_c时,加热使涡脱落频率f下降,甚至完全抑制涡脱落;加热使涡脱落处于临界状态时,其涡脱落频率f_c与来流风速U成正比;加热可影响圆柱绕流的涡脱落模式,使热线功率谱的单峰变为双峰。
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| 关 键 词： | 圆柱绕流 旋涡脱落 尾流控制 加热 |
Effects of Heat Transfer on the Wake of a Circular Cylinder |
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| Jiang Xiaoqin Dong Yufei Wei Zhonglei Zheng Zueling Du Xianzhi. Effects of Heat Transfer on the Wake of a Circular Cylinder[J]. Journal of Naval University of Engineering, 1997, 0(2) |
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| Authors: | Jiang Xiaoqin Dong Yufei Wei Zhonglei Zheng Zueling Du Xianzhi |
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| Affiliation: | Jiang Xiaoqin Dong Yufei Wei Zhonglei Zheng Zueling Du Xianzhi |
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| Abstract: | The experiments were carried out in the low speed, low turbulence wind tunnel. Some experiments of heating control over vortex shedding behind electrically heated circular cylinder are reported. Experimental results suggest that the frequency of the vortex shedding decreased as the circular cylinder is heated, and depending on the Reynolds number value, complete suppression of the vortex shedding phenomenon can be achieved with the increase of heat input. The mode of the votex shedding can be transited from parallel mode to oblique mode when the heating power is great enough. As a result, the single peak of the velocity spectra is splited into two. |
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| Keywords: | Bluff body wakes Vortex shedding Wake control Heating |
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