| 射流角度和壁面曲率对撞壁液膜的影响 |
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| 引用本文： | 林庆国,杨成虎,刘 犇. 射流角度和壁面曲率对撞壁液膜的影响[J]. 国防科技大学学报, 2013, 35(2): 17-21 |
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| 作者姓名： | 林庆国 杨成虎 刘 犇 |
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| 作者单位： | 1.国防科技大学 航天科学与工程学院，湖南 长沙 410073；2.上海空间推进研究所，上海 200233;2.上海空间推进研究所，上海 200233;2.上海空间推进研究所，上海 200233 |
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| 摘 要： | 射流角度和壁面曲率是空间液体火箭发动机液膜冷却设计的重要参数,通过实验研究了入射角和壁面曲率半径对射流撞壁液膜形态和液膜厚度的影响;实验中液膜厚度的测量采用探针法法测量。对射流撞壁的溅射现象进行的分析表明,射流由壁面附着状态转变为液滴飞溅状态的临界We数为214.1,射流撞壁后由附壁状态转变为溅射状态的临界入射角度为23.1°,根据液体火箭发动机冷却的需要可以选择合适的射流角度。
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| 关 键 词： | 液体火箭发动机 液膜冷却 入射角 实验研究 |
| 收稿时间： | 2012-09-12 |
| 修稿时间： | 2013-03-07 |
Effect of impingement angle and wall curvature on liquid film |
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| LIN Qingguo,YANG Chenghu and LIU Ben. Effect of impingement angle and wall curvature on liquid film[J]. Journal of National University of Defense Technology, 2013, 35(2): 17-21 |
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| Authors: | LIN Qingguo YANG Chenghu LIU Ben |
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| Affiliation: | Ben2(1.College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China; 2.Shanghai Institute of Space Propulsion,Shanghai 201112,China) |
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| Abstract: | Impingement angle and wall curvature are important for liquid film cooling design of liquid rocket engine. The effect of impingement angle and wall curvature on film form and thickness was studied experimentally. The film thickness was calculated by contact needle method. Splash occurred with high Webber number during impingement. The critical Webber number for transformation from adherent to splash is 214.1, and the critical impingement angle is 23.1°, which means the impingement angle can be optimized for different liquid rocket engines. |
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| Keywords: | liquid rocket engine liquid film cooling impingement angle experimental study |
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