Large-scale measurements and numerical simulations of in-cloud icing around a mountain ridge

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• 作者：Magne A. Drage^a ; ^md@emgs.no ; Thomas K. Thiis^b ; ^{thomas.thiis@umb.no}
• 关键词：Atmospheric icing ; Measurements ; Numerical simulations
• 刊名：Journal of Wind Engineering and Industrial Aerodynamics
• 出版年：2012
• 期刊代码：55_01676105
• 类别：ms
• 出版时间：May-July, 2012
• 卷：104-106
• 期：Complete
• 页码：523-531
• 文件大小：2263 K

摘要

Atmospheric icing by in-cloud icing has been measured around the ridge of Mt. Gaustatoppen (59掳51', 08掳N39'E) in Norway, during a period of 5 days. Sixteen sticks of 2 m height and 32 mm diameter were placed around the edge of the mountain ridge. The icing on the sticks was measured as well as the meteorological conditions. A finite volume CFD solver was used to simulate the wind flow and the rate of icing around the top 270 m of the mountain.

Measurements and simulations show that even small variations in the location of the sticks around the ridge of a mountain peak, can cause large variations in accreted ice on the sticks. A basic understanding of the air flow around isolated mountain peaks is vital to understand how complex topography and altering wind direction strongly influence icing intensity. In this case use of a micro-scale numerical model to describe the wind field around the mountain peak, or measurements at the location for a short period of time, proves to give valuable information.