| 折流燃烧室外环前端发散孔综合冷却效率模型实验 |
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| 引用本文： | 任孝文,张靖周,谭晓茗,王倚阳,宋双文.折流燃烧室外环前端发散孔综合冷却效率模型实验[J].航空动力学报,2017,32(6):1321-1327. |
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| 作者姓名： | 任孝文 张靖周 谭晓茗 王倚阳 宋双文 |
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| 作者单位： | 1.南京航空航天大学 能源与动力学院 江苏省航空动力系统重点实验室，南京 210016 |
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| 摘 要： | 针对某型折流燃烧室外环壳体前端典型区域，设计了模拟主流局部流场的发散冷却模型.通过红外热像仪测量发散孔板表面的温度场，分析比较了吹风比、发散孔阵列方式、孔径及开孔率对综合冷却效率的影响.发散孔阵列方式有正菱形、长菱形和超长菱形3种，孔径变化范围为0.6~1.0mm，开孔率范围为3%~6%，吹风比变化范围为1~6.结果表明:由于壳体前端回流区的影响，发散孔板综合冷却效率沿主流方向整体呈现先升高后降低的趋势.吹风比为2时的综合冷却效率最高，发散孔阵列呈长菱形排布较优.在相同的开孔率下，孔径的减小有利于改善综合冷却效率.发散孔板开孔率从3%增加到4.8%可以显著提高综合冷却效率.
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| 关 键 词： | 折流燃烧室 发散冷却 综合冷却效率 模型实验 局部回流区 |
| 收稿时间： | 2015/6/14 0:00:00 |
Modeled experiment on overall cooling effectiveness of effusion holes in front of outer liner of annular slinger combustor |
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| REN Xiaowen,ZHANG Jingzhou,TAN Xiaoming,WANG Yiyang,SONG Shuangwen.Modeled experiment on overall cooling effectiveness of effusion holes in front of outer liner of annular slinger combustor[J].Journal of Aerospace Power,2017,32(6):1321-1327. |
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| Authors: | REN Xiaowen ZHANG Jingzhou TAN Xiaoming WANG Yiyang SONG Shuangwen |
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| Abstract: | An experimental model for simulating the local primary flow field near the front of outer liner of annular slinger combustor was designed to study the effusion cooling performance. The surface temperature distribution on the perforated plate was measured by the infrared camera, and the effects of blowing ratio, effusion holes-array arrangement, hole diameter and perforated percentage on the overall cooling effectiveness were then compared. Three effusion holes-array arrangements including square-diamond mode, long-diamond mode and super-long-diamond mode were adopted. The hole diameter varied from 0.6mm to 1.0mm, the perforated percentage varied from 3% to 6% and the blowing ratio varied from 1 to 6. The results show that the overall cooling effectiveness increases firstly along the streamwise direction and then decreases downstream due to the existence of recirculation zone in the front of outer liner. The blowing ratio of 2 results in the highest overall cooling effectiveness and the long-diamond holes-array arrangement seems to be advantageous. The decrease of hole diameter is helpful for improving the overall cooling effectiveness under the same perforated percentage. When the perforated percentage increases from 3% to 4.8%, the overall cooling effectiveness is significantly enhanced. |
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| Keywords: | annular slinger combustor effusion cooling overall cooling effectiveness modeled experiment local recirculation zone |
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