污垢沉积影响叶片表面换热的研究

石慧; 李亮; 丰镇平

doi:10.13224/j.cnki.jasp.2015.11.008

污垢沉积影响叶片表面换热的研究

doi: 10.13224/j.cnki.jasp.2015.11.008

石慧^1,2,
李亮¹,
丰镇平¹

1. 西安交通大学能源与动力工程学院叶轮机械研究所, 西安 710049;
2. 西安热工研究院有限公司节能减排技术中心, 西安 710032

基金项目:

国家重点基础研究发展计划(2007CB210107)

详细信息

作者简介:
石慧(1991-),女,山东菏泽人,硕士生,主要从事燃气轮机换热问题研究.

中图分类号: V231;TK472
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- 文章访问数: 869
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- 被引次数: 0
出版历程
- 收稿日期: 2014-04-10
- 刊出日期: 2015-11-28

Research of fouling deposition influence on heat transfer of blade surface

1. Institute of Turbomachinery, School of Energy and Power Engeering, Xi'an Jiaotong University, Xi'an 710049, China;
2. Energy Saving Center, Xi'an Thermal Power Research Institute Company Limited, Xi'an 710032, China

摘要

摘要: 选用了两个实际透平叶片MARKⅡ静叶和某高压透平静叶,前者为光滑叶片,后者为表面覆盖有圆台的粗糙表面叶片.利用CFD数值模拟技术对叶栅流道特性和叶片表面换热分布进行数值模拟计算,数值计算结果与实验结果对比验证了数值方法的可靠性.研究表明,准确预测转捩位置和选取合适的y⁺值是计算叶片表面换热特性的关键,剪切应力输运(SST)转捩模型预测的结果最令人满意.在粗糙叶片表面数值计算中,对表面粗糙度模型进行验证,然后详细分析了污垢沉积对叶片表面换热的影响.结果表明:随着叶片表面粗糙度的增大,叶片近壁面湍流增强,叶片的表面传热系数增大.
- 叶片 /
- 光滑表面 /
- 粗糙表面 /
- 换热特性 /
- 污垢沉积
Abstract: Two turbine blades, the MARKⅡ vane and a high pressure turbine vane, were chosen in the study. The former blade surface was smooth and the latter was rough, covered with evenly spaced truncated cones. The CFD numerical simulation technique was used to calculate the cascade characteristics and blade surface heat transfer distribution. The reliability of the computational method was validated by comparing the calculated results with the experimental data. The results show that accurate prediction of the transition location and appropriate y⁺ value are key to calculate the heat transfer characteristics of the blade surfaces. The predicted results by using the shear stress transport(SST)transition model are most satisfactory. In the calculation of rough blade, the roughness model was verified and then fouling deposition effects on heat transfer characteristics were analyzed in detail. It is shown that the heat transfer coefficient on the rough blade surface is enlarged with the increase of surface roughness, due to the enhancement of near-wall turbulence.
- blade /
- smooth surface /
- rough surface /
- heat transfer characteristics /
- fouling deposition

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参考文献(18)

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