风沙流/沙尘暴与高雷诺数壁湍流野外观测

Field observations on wind-blown sand/dust storm and high Reynolds wall turbulence

风沙流与沙尘暴是发生在高雷诺数大气边界层中的气固两相流,对风沙流与沙尘暴的深入认识、准确预报和科学防治都要基于对风沙运动规律的认知和把握,因而需要借鉴高雷诺数湍流的研究成果。本文综述了高雷诺数壁湍流和风沙流/沙尘暴研究的现状,着重介绍了在中国民勤地区建立的沙尘暴与高雷诺数壁湍流野外观测站,以及基于观测站的观测列阵所获得的初步成果,展望了进一步的发展方向。

Wind-blown sand and dust storm are typical gas-solid two phase flow occur in high Reynolds atmospheric boundary layer turbulence. Better understanding, accurate prediction and effective controlling of wind-blown sand and dust storm all rely on knowledges of sand/dust particle movement, and therefore on the research results on high Reynolds wall turbulence： The driving force of particle movement. After a briefly review on high Reynolds wall turbulence and sand/dust storm researches, the Qingtu Lake Observation Array （QLOA） established in Minqin county was introduced in detail. Preliminary results achieved in the light of observed data and outlook were described.