| 驻点热流测量试验技术研究 |
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| 引用本文： | 秦峰,何川,曾磊,孔荣宗,刘济春.驻点热流测量试验技术研究[J].西南交通大学学报,2013,26(6):1072-1077. |
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| 作者姓名： | 秦峰 何川 曾磊 孔荣宗 刘济春 |
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| 摘 要： | 为了提高超声速脉冲风洞中球头驻点热流测量精度，对1 mm小型化同轴热电偶研制及薄膜热流传感器的耐冲刷性能进行研究.应用热传导反问题的计算分析方法，建立了分别针对薄膜热流传感器和同轴热电偶的数据处理方法.在2 m激波风洞上利用研制的5种不同类型及尺寸的传感器进行了球头驻点热流测量试验，将试验结果与F-R公式计算结果进行比较，并分析了传感器外形尺寸、热壁、传感器敏感元件、同轴热电偶膜厚等对试验结果的影响.结果表明:研制的小型化同轴热电偶响应时间满足测试要求；薄铂膜热流传感器重复性误差在8%以内.
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| 关 键 词： | 驻点 热流 同轴热电偶 导热反问题 |
| 收稿时间： | 2012-04-05 |
Experimental Research of Heat-Transfer Measurements on Stagnation Points |
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| QIN Feng,HE Chuan,ZENG Lei,KONG Rongzong,LIU Jichun.Experimental Research of Heat-Transfer Measurements on Stagnation Points[J].Journal of Southwest Jiaotong University,2013,26(6):1072-1077. |
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| Authors: | QIN Feng HE Chuan ZENG Lei KONG Rongzong LIU Jichun |
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| Abstract: | In order to improve the measurement precision of stagnation point heat transfer in shock tunnel tests, a research on developing a coaxial thermal-couple of 1 mm diameter and improving the endurance of thin-film heat-transfer sensors was carried out. Data processing methods of the two sensors were established based on the theoretical model for the inverse problem of heat conduction. Five heat transfer sensors of different types and dimensions were tested in a shock tunnel of 2 m diameter. The test results were compared to those calculated by F-R formula, and the influences of factors such as sensor shape, hot wall, sensing elements, and film thickness on the test results were analyzed. The results show that the response time of the coaxial thermal couple satisfies the test requirement, and the repeatability error of the thin film heat transfer sensor was is less than 8%. |
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