| 阵列射流冲击冷却换热特性的数值研究 |
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| 引用本文： | 韩宇萌,王新军,仇璐珂,俞茂铮,赵世全,贾文,艾松.阵列射流冲击冷却换热特性的数值研究[J].汽轮机技术,2010,52(3). |
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| 作者姓名： | 韩宇萌 王新军 仇璐珂 俞茂铮 赵世全 贾文 艾松 |
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| 作者单位： | 1. 西安交通大学能源与动力工程学院,西安,710049
2. 东方汽轮机有限公司,德阳,618000 |
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| 基金项目： | 国家重点基础研究发展计划(973)资助项目 |
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| 摘 要： | 运用数值计算的方法对不同流动取向的多排孔冲击射流冷却特性进行了三维模拟,并对有初始横向流的多排孔冲击射流冷却特性进行了数值研究,揭示出射流雷诺数、流动方向、初始横向流对冲击冷却传热特性的影响规律。结果表明:研究范围内,射流雷诺数越大,冲击靶面换热效果越好;冲击腔室两端都设为出口时努赛尔数峰值所对应的射流驻点区向下游偏移最小且换热效果最好;当横流雷诺数与射流雷诺数之比大于0.5之后,有横流时的冲击射流冷却局部努赛尔数比无横流时有较为显著下降。
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| 关 键 词： | 冲击冷却 流动方向 初始横向流 换热特性 数值计算 |
Numerical Study on Heat Transfer Characteristics of Jet Array Impingement |
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| HAN Yu-meng,WANG Xin-jun,QIU Lu-ke,YU Mao-zheng,ZHAO Shi-quan,JIA Wen,AI Song.Numerical Study on Heat Transfer Characteristics of Jet Array Impingement[J].Turbine Technology,2010,52(3). |
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| Authors: | HAN Yu-meng WANG Xin-jun QIU Lu-ke YU Mao-zheng ZHAO Shi-quan JIA Wen AI Song |
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| Affiliation: | HAN Yu-meng1,WANG Xin-jun1,QIU Lu-ke1,YU Mao-zheng1,ZHAO Shi-quan2,JIA Wen2,AI Song2(1 School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China,2 Dongfang Steam Turbine Limited Company,Deyang 618000,China) |
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| Abstract: | Three-dimensional numerical study is conducted to investigate the heat transfer characteristics for the effect of cross-flow direction and initial cross-flow on impingement cooling.The effects of the jet Reynolds number,flow direction and initial cross-flow on heat transfer characteristic are investigated.Results show that local heat transfer coefficient increases with an increase jet Reynolds number.Highest heat transfer coefficients are obtained for a cross-flow orientation where flow exits in both direct... |
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| Keywords: | jet impingement flow direction initial cross-flow heat transfer numerical calculation |
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