| 一种高超声速稀薄流激波干扰气动热测量技术 |
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| 引用本文： | 王宏宇,王辉,石义雷,龙正义,毛春满,李杰. 一种高超声速稀薄流激波干扰气动热测量技术[J]. 宇航学报, 2020, 41(12): 1525-1532. DOI: 10.3873/j.issn.1000-1328.2020.12.006 |
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| 作者姓名： | 王宏宇 王辉 石义雷 龙正义 毛春满 李杰 |
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| 作者单位： | 中国空气动力研究与发展中心超高速空气动力研究所，绵阳 621000 |
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| 基金项目： | 国家自然科学基金（11872068） |
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| 摘 要： | 针对高超声速稀薄来流条件下的激波干扰气动热测量问题，设计了一种适用长时间、中低热流量值(5~500 kW/m2)的带封装结构的量热计，采用空气隔热设计方式降低其侧向传热，实现了有效一维传热，延长了测试时间；并通过热流传感器标定试验，实现了热流高精度测量。为验证量热计的测量性能，开展了地面标定实验和基于双锥模型的高超声速低密度风洞激波/边界层干扰实验(M10和M12)，量热计与同轴热电偶的测量结果进行对比分析。研究结果表明，本文所设计的量热计适用于稀薄来流条件下激波干扰引起的复杂气动热问题的热流测量。相比于同轴热电偶，量热计响应时间较慢，但对于较大热流，由于极大减轻了侧向传热的影响，测量精度较高。同轴热电偶对低量值热流(5~20 kW/m2)的测量性能较好，信噪比(SNR)较高。研究成果为开展高超声速低密度风洞稀薄流激波干扰气动热试验研究提供支撑。
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| 关 键 词： | font-size:10.5pt '>气动热 量热计 激波/边界层干扰 高超声速流动 |
| 收稿时间： | 2020-01-17 |
An Aerothermodynamics Measuring Technique for Shock Interactionsin Hypersonic Low Density Flow |
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| WANG Hong yu,WANG Hui,SHI Yi lei,LONG Zheng yi,MAO Chun man,LI Jie. An Aerothermodynamics Measuring Technique for Shock Interactionsin Hypersonic Low Density Flow[J]. Journal of Astronautics, 2020, 41(12): 1525-1532. DOI: 10.3873/j.issn.1000-1328.2020.12.006 |
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| Authors: | WANG Hong yu WANG Hui SHI Yi lei LONG Zheng yi MAO Chun man LI Jie |
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| Affiliation: | Hypersonic Aerodynamic Institute of China AerodynamicsResearch and Development Center, Mianyang 621000, China |
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| Abstract: | A novel calorimeter suitable for long timeand medium/low heat flux (5~500 kW/m2) measurement isproposed in this paper to investigate the aerothermodynamic problems induced byshock interactions in hypersonic low density flow. Thecalorimeter is designed by a way of air gap insulation to alleviate the lateralheat transfer, which approximates the one dimensionalheat conduction and consequently extends its effective measuring time. Then,the fabricated calorimeters are calibrated to improve the accuracy ofmeasurement. In order to validate the performance of the calorimeter, thecalibration experiment and hypersonic low density windtunnel experiment with a double cone model are carried out. The heat fluxmeasured by the calorimeter is compared with the coaxial thermocouple results.The results show that the response time of the calorimeter is longer than thatof the coaxial thermocouple; but for a larger heat flux, the measurementaccuracy of the calorimeter is higher because the lateral heat transfer is greatlyalleviated. The coaxial thermocouple has better performance in low heat flux(5~20 kW/m2) measurement with a larger signal to noise ratio (SNR). The research providesa measurement technique for the investigation on shock wave/boundary layerinteractions in hypersonic low density wind tunnel. |
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