Assessing Characteristics of the Rosemount Icing Detector Under Natural Icing Conditions
Assessing Characteristics of the Rosemount Icing Detector Under Natural Icing Conditions
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评估自然结冰条件下罗斯蒙特结冰探测器的特性
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
G. Isaac
中科院分区：
文献类型：
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作者：
S. Cober;A. Korolev;G. Isaac
罗斯蒙特结冰探测器（RID）的性能特点是使用在冬季风暴的微物理条件的现场测量。RID安装在国家研究理事会（NRC）Convair-580飞机上，在第一次和第三次加拿大冷冻细雨实验（CFDE I和EQ分别）飞行期间收集数据。飞机遇到的结冰环境包括液相、混合相（液体和冰水凝物）、冻雨和冻雨环境。对于在97 ± 10 m s-1的空气速度下操作的RID，液态水含量（LWC）检测阈值估计为0.007 ± 0.010 g m-1。这一数值与Mazin等人（2000年）的预测一致，后者估计轻载水含量阈值为0.002至0.006 g/m。没有显着的RID响应被发现在冰川云，这意味着所观察到的条件下，该仪器可用于分离冰川和混合相云。液相和混合相条件之间的RID响应没有显着变化，这表明冰晶既没有侵蚀冰堆积，也没有附着在RID表面。在持续结冰的遭遇，RID信号和LWC之间的线性关系后，RID信号超过400 mV以上的晴空信号水平观察。发现从RID得到的LWC与LWC测量值在± 50%范围内一致，有83%的数据。当水滴中值体积直径（MVD）> 100 μ m时，RID信号与LWC之间的关系不变。的RID的特点，突出的数据分析，将进行讨论。
The performance of a Rosemount Icing Detector (RID) has been characterized using in-situ measurements of microphysical conditions in winter storms. The RID was mounted on the National Research Council (NRC) Convair-580 aircraft, with the data collected during flights from the First and Third Canadian Freezing Drizzle Experiments (CFDE I and EQ respectively). Aircraft icing environments encountered included liquid phase, mixed phase (liquid and ice hydrometeors), freezing rain and freezing drizzle environments. The liquid water content (LWC) detection threshold was estimated to be 0.007 ± 0.010 g m" for the RID operated at air speeds of 97 ± 10 m s". This value agrees with the predictions of Mazin et al. (2000) who estimated a LWC threshold of 0.002 to 0.006 g m. No significant RID response was found in glaciated clouds, implying that for the conditions observed, the instrument can be used to segregate glaciated and mixed phase clouds. There was no significant change in the RID response between liquid and mixed phase conditions, suggesting that ice crystals neither eroded ice accumulation nor accreted to the RID surface. During sustained icing encounters, a linear relationship between the RID signal and LWC was observed after the RID signal exceeded 400 mV above the clear air signal level. The LWC derived from the RID was found to agree with LWC measurements within ± 50% for 83% of the data. The relationship between the RID signal and LWC was unchanged for freezing precipitation environments with drop median volume diameters (MVD) > 100 jurn. Characteristics of the RID, highlighted by the analysis of the data, will be discussed.