| 受限射流流场热量传递特性的实验研究 |
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| 引用本文： | 陈维汉,谭清香,唐全,何立同.受限射流流场热量传递特性的实验研究[J].华中科技大学学报(自然科学版),1991(2). |
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| 作者姓名： | 陈维汉 谭清香 唐全 何立同 |
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| 作者单位： | 华中理工大学动力工程系
(陈维汉，谭清香，唐全)，华中理工大学动力工程系(何立同) |
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| 摘 要： | 锅炉煤粉燃烧往往是通过煤粉与空气混合后喷射进入炉内卷吸高温烟气而预热、着火的,其着火过程的早晚与射流和烟气间的热量交换情况关系极大.而这种交换实质上就是射流流股与被卷吸的气流之间的质量、动量和热量传递的结果,在湍流情况下这三者之间是相互影响的.尽管对湍流射流的研究比较成熟,有大量的文献资料可以查阅,然而由于射流流场的复杂性,大多数结果很难直接应用于具体的实际情况.如上所述,要计算射流与卷吸气流间的热通量就是一件较困难的工作.有鉴于此,本文对受限平面射流流场进行了实验测定,以模拟炉内冷态流动情况,而重点放在射流流股与外卷吸气流间的热量传递过程的测量与计算.实验的具体做法是用热线风速仪和热电偶测定流场的速度、脉动速度、温度及温度梯度,并结合湍流单方程模型计算出射流流场的热流分布,尤其是扩散热流的分布.
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An Experimental Investigation on Heat Transfer of a Planar Finite Jet |
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| Chen Weihan Tan Qingxiang Tang Quan He Litong.An Experimental Investigation on Heat Transfer of a Planar Finite Jet[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1991(2). |
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| Authors: | Chen Weihan Tan Qingxiang Tang Quan He Litong |
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| Institution: | Chen Weihan Tan Qingxiang Tang Quan He Litong |
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| Abstract: | In order to study the preheating and igniting processes of pulverized coal-air flow in a boiler, the heat transfer and flow of a planar finite jet have been investigated. The distributions of the velocity, the fluctuating velocity and temperature have been measured with a hot-wire meter and fine double thermocouples. The heat flux field has been calculated on the basis of the experimental results and the one-equation turbulence model. |
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| Keywords: | Finite jet Heat flux distribution Flow field measurement |
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