Research progress of test technologies for 3 m×2 m icing wind tunnel
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摘要: 3 m×2 m结冰风洞于2013年建成,近年来该风洞的试验技术研究取得了一系列的进展。首先对风洞概况和相关试验技术进行了介绍,包括总体情况、性能指标、试验能力等,重点阐述了该结冰风洞已形成的云雾场参数校测、冰形特征捕获、热气防冰和电热除冰等试验技术。其次,对发动机、直升机结冰与防除冰、过冷大水滴和冰晶雨雾模拟等结冰风洞试验技术新的发展方向进行了分析和探讨,提出了发展思路。可为结冰风洞建设与试验技术的研究提供参考。Abstract: The 3 m×2 m icing wind tunnel was built in 2013. A lot of progresses have been made in the research of the wind tunnel test technologies in recent years. This paper presents the basic situations and test technologies of the 3 m×2 m icing wind tunnel, including overall situation, technical indexes and test capabilities. The status of the conventional icing and anti-icing test technologies in the 3 m×2 m icing wind tunnel, such as the calibration of cloud parameters, the capture of ice characteristics, the anti-icing technology using hot air and the de-icing technology using electrics are described in detail. From the view of engineering application and basic research, the research trend of test technologies in the fields of aircraft engines, helicopters, supercooled large droplets (SLD), and ice crystals are highlighted and analyzed. The development ideas and methods are put forward from the perspective of independent innovation. This paper provides a reference for the research on the construction and test technology development for the icing wind tunnel.
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Key words:
- aircraft icing /
- icing wind tunnel /
- test technology /
- research progress
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主试验段 次试验段 高速试验段 长×宽×高/(m×m×m) 3.0×2.0×6.5 4.8×3.2×9.0 2.0×1.5×4.5 风速/(m·s-1) 21 ~210 8~78 26~256 温度 范围:常温~-40 ℃速率:从20 ℃降到-20 ℃时, 时间不超过40 min不均匀性:≤1 ℃控制精度:±0.5 ℃ 湿度 范围:70%~100%(-15~-20 ℃); 100%(-20~-40 ℃)精度:±5% 高度 结冰试验:0~7000 m高空低雷诺数试验:0~20 000 m 云雾参数 液态水含量(LWC):0.2~3 g/m3平均水滴直径(MVD):10~300 μm雾化均匀区:60%试验段截面积 表 2 冰晶模拟技术指标
Table 2. Crystal-icing simulation technical indexes
参数 最小值 最大值 高度/km 1.2 15.0 进气总温 -60 ℉(-51 ℃) 50 ℉(10 ℃) 马赫数 0.15 0.80 进气流量/(kg·s-1) 4.5 150.0 LWC/(g·m-3) 0.5 8.0 MVD/μm 15 >100(非全冻结) 结冰时间/min 45(连续) -
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