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A Compact Icing Research Tunnel for Ice Adhesion Characterization
Journal of Thermophysics and Heat Transfer ( IF 1.1 ) Pub Date : 2021-04-23 , DOI: 10.2514/1.t6096
Edem Tetteh , Eric Loth , Jim Loebig , Jessica Cummings , John Harvell

A compact icing facility is developed to allow the measurement of ice adhesion tensile stress and fracture energy of aerospace impact ice, in coordination with thermal measurements, to ensure a well-characterized thermal environment. The facility was 1.5 m wide, 1.5 m long, and 2.1 m tall, and the tunnel is equipped with a single MOD-1 spray nozzle to produce a cloud of supercooled droplets at the targeted mean volumetric diameter for a liquid water content range from 2 to 4g/m3. The compact icing research tunnel (CIRT) was used to generate ice accretion on an aluminum test specimen, which was then measured to determine the ice tensile adhesion strength for two conditions: impact ice and static ice. The static ice was made by freezing motionless deionized water on the aluminum test specimen, whereas impact ice was obtained as a result of water droplets freezing after impacting the specimen at the velocity of about 40m/s, with air and surface temperature both at 20°C. It was found that the substrate temperature increased significantly through the accretion process, to about 5°C for static ice and 7°C for impact ice (where the latter includes a significant increase in humidity).



中文翻译:

紧凑型结冰研究隧道,用于冰粘附特性的表征

开发了一种紧凑型的结冰设施,可以与热测量值一起测量航天冲击冰的冰粘附张应力和断裂能,以确保良好表征的热环境。该设施的宽度为1.5 m,长度为1.5 m,高度为2.1 m,该隧道配有单个MOD-1喷嘴,可在目标平均体积直径范围内产生液态水含量范围为2的过冷液滴云。至4G/3。紧凑的结冰研究隧道(CIRT)用于在铝试样上产生积冰,然后对其进行测量以确定在两种条件下冰的拉伸粘合强度:冲击冰和静态冰。静态冰是通过将静止的去离子水冷冻在铝制试样上制成的,而撞击冰是由于水滴以大约10毫米的速度撞击试样后冻结而产生的。40/s,空气和表面温度都在 -20°C。已经发现,通过吸积过程,基板温度显着升高,对于静态冰,冲击冰达到约5°C,对于冲击冰,冲击冰达到7°C(后者的湿度显着增加)。

更新日期:2021-04-23
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