流体机械

2005, (07) 30-32+51

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用量纲方法分析旋流场中的应力
Investigation of Stress in a Hydrocyclone Field with Dimension

曹仲文,袁惠新
CAO Zhong-wen,YUAN Hui-xin (Southern Yangtze University, Wuxi 214063,China)

摘要(Abstract):

在全面阐述旋流场应力的基础上,运用量纲分析比较的思想对旋流场中的应力作了分析比较。由分析可知在粘性应力中,切向和径向剪切应力占主导地位;而在湍流条件下,雷诺应力是粘性应力的若干倍数,此倍数在量级上即为雷诺数。由于各应力值的不同,故各应力在旋流场中的作用也各不相同。
The stress in a hydrocyclone field are expounded and are analyzed with dimension. The conclusion is that sheering and radial stress are dominant in viscosity shearing force, and that Reynolds stress is larger than viscosity stress in turbulent flow, and the multiple is the Reynolds number. As the dimension of kinds of stress are different ,the function of kinds of stress are different.

关键词(KeyWords): 粘性应力;雷诺应力;量纲比较
viscosity stress;Reynolds stress;analysis with dimension

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作者(Author): 曹仲文,袁惠新
CAO Zhong-wen,YUAN Hui-xin (Southern Yangtze University, Wuxi 214063,China)

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