| 李润东，李明春，郭曾嘉，贺业光，杨天华.穹顶形扰流柱冲击冷却系统综合换热效率数值模拟[J].航空发动机,2020,46(6):16-21 |
| 穹顶形扰流柱冲击冷却系统综合换热效率数值模拟 |
| Numerical Simulation on Gross Cooling Effectiveness of Impingement Cooling System withDome-like Pin-fins |
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| DOI： |
| 中文关键词: 冲击冷却 扰流柱 换热特性 流动特性 综合换热效率 燃气轮机 |
| 英文关键词:impingement cooling pin-fins heat transfer characteristic flow characteristic gross cooling effectiveness gas turbine |
| 基金项目:国家“万人计划”科技创新领军人才（组厅字〔2016〕37 号-286）项目、辽宁省攀登学者奖励计划资助 |
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| 中文摘要: |
| 为了分析扰流柱对冲击冷却效率的影响，采用数值模拟方法对穹顶形扰流柱冲击冷却系统进行研究，获得其换热与流
动特性，并与平板靶板冲击冷却系统和圆形扰流柱冲击冷却系统进行对比分析。结果表明：穹顶形扰流柱冲击冷却系统可以同时获
得良好的换热效果与较小的流动阻力系数。与圆形扰流柱靶板相比，穹顶形扰流柱靶板的Nu 增大了13.8%，而流动阻力却减小了
5.3%；其综合换热效率提高了17.9%。从综合换热效率的角度看，穹顶形扰流柱冲击冷却系统优于平板靶板冲击冷却系统和圆形扰
流柱冲击冷却系统。 |
| 英文摘要: |
| In order to analyze the effect of the pin-fins on impingement cooling efficiency，the impingement cooling system with domelike
pin-fins was studied by numerical simulation method，and its heat transfer characteristics and flow characteristics were obtained. The
impingement cooling system with target plate pin-fins and circular pin fins were compared and analyzed with the impingement cooling
system with dome-like pin-fins. The results show that the impingement cooling system with dome-like pin-fins can obtain good heat
transfer and small flow resistance coefficient simultaneously. Compared with the target plate in circular pin-fins system ，the Nu of target
plate in dome-like pin-fins system increased by 13.8%，while the flow resistance decreased by 5.3%，and the gross cooling effectiveness
increased by 17.9%. From the point of gross cooling effectiveness，the impingement cooling system with dome-like pin-fins is superior to
that of target plate and circular. |
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