| 摘要: |
| 针对6种高致密多孔层板结构，利用CFD软件进行流动与换热的数值模拟，分析了冲击孔、扰流柱以及气膜孔的排列方式对层板流动特性和冷却效率的影响。计算结果表明:6种不同的排列方式，总压力损失均为4.5%左右，其中气流流经冲击壁与气膜壁的压力损失为2.2%左右；不同结构的双层板当量流量系数在0.86左右；层板的排列方式对综合冷却效果影响较大，在其他结构参数不变的情况下，不同的排列方式之间的综合冷却效率最大差值达到10％，在流体流动方向上，各排列的气膜壁面的温度梯度由最初的21K/mm减小到15K/mm；综合考虑各项因素的影响，气膜孔呈梭形排布最优的排列方式，其综合冷却效率最好。 |
| 关键词: 层板结构 压力损失 流量系数 冷却效率 数值模拟 |
| DOI： |
| 分类号:V233.1 |
| 基金项目: |
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| Research on Structures of High-Density Laminate Porous Plates |
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ZHAO Nai-fen1,TAN Xiao-ming1,LI Ye-fang1,FANG Ren-lin2,XU Hua-sheng2
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(1.Jiangsu Province Key Laboratory of Aerospace Power Systems，College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China;2. China Gas Turbine Establishment，Chengdu 610500，China)
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| Abstract: |
| Numerical simulation is carried out by CFD software to study six kinds of high-density porous lamilloy configurations. Arrays of impinging holes，pin-fins and film holes were studied to obtain cooling coefficient，lamilloy flow characteristic and pressure loss coefficient. The results show that the total pressure loss is about 4.5% for different arrangements with a 2.2% pressure-loss through impinging and film wall. Lamilloy equivalent flow coefficients of different configurations are always about 0.86. Maximum difference of cooling efficiency of lamilloy different configurations is up to 10%. Along flow direction，the film wall temperature rate decreases from 21K/mm to 15K/mm. By comprehensive comparision，‘shuttle’ shape is better than others with the highest cooling efficiency. |
| Key words: Lamilloy configurations Pressure loss Flow coefficient Cooling efficiency Numerical simulation |
