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Blown-sand transport rate

机译:吹砂速度

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摘要

Several sand transport rate data sets and eight representative transport rate formulae are transformed using the dimensionless parameters φ = gQ/U_*~3 and r = U_(*t)/U_* and the results compared on the (φ, r) plane. The formulae generate three different geometric patterns-constant, monotonic decreasing and concave downward-and the corresponding data displayed one more pattern, a monotonic increasing one. Stimulated by this discrepancy, a new general formula for the sand transport rate with φ and r as its basis is introduced; each of the representative formulae is either a particular case of it or an approximation to it. The four parameters in the new formula are determined for description of the four possible patterns exhibited by the data; their variation is established and their physical interpretation is discussed in relation to measured data of the characteristic parameters of wind flow and sand.
机译:使用无量纲参数φ= gQ / U_ *〜3和r = U _(* t)/ U_ *转换几个砂子传输速率数据集和八个代表性的传输速率公式,并在(φ,r)平面上比较结果。这些公式生成三种不同的几何图案-恒定,单调递减和向下凹入-相应的数据又显示一种模式,单调递增。在这种差异的刺激下,引入了以φ和r为基础的输沙速率的新通用公式。每个代表性公式要么是其特定情况,要么是其近似值。确定新公式中的四个参数以描述数据显示的四个可能模式;建立了它们的变化,并根据风沙特征参数的实测数据讨论了它们的物理解释。

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