风沙流

本论文发挥交叉学科的优势，采用气固两相流体力学理论和PTV测量技术研究这一现象，从新的角度认识沙粒起动和风沙流结构，为风沙流动的研究打开了新的思路。

Our research depends on the advantage of cross-knowledge and makes a research on this subject by Gas-Solid Hydromechanics theory and PTV measure technology . Our research tries to understand sand incipience and wind-sand flow structure , find a new way to research the wind-blown-sand flow .

风沙流在植株前后发生沉积，而在植株两侧发生轻微风蚀。

Wind-sand flow is deposited both in front and back of the plant , and it erode slightly in both sides of plant .

本论文采用DEM和软球模型相结合的方法对风沙流中三维粒-床碰撞过程开展研究。

Combined with DEM and soft-model approach , this thesis focuses on the significant three dimensional grain / bed collision process in the wind-blown sand .

通过对已建立的两条灌木林带防护效应的观测分析，结果表明：灌木林带使其周围的气流场重新分布，改变了近地表风沙流结构，0.5、2m高处的风速梯度发生显著变化。

Observational results show that the airflow field nearby shrub shelter belt is redistributed , and the near-surface sand stream is dramatically changed .

Magnus力对风沙流结构与能量的影响和以公切角表征的非均匀沙起动风速

The Effects of Magnus Force on Sand Flux and Energy and Threshold Wind Velocity to Non-uniform Sand by the Common Tangential Angle

在20～100cm高度内以幂函数规律递减，反映的是悬移质为主的风沙流结构。

And from 20 to 100 cm , the concentration decreases in power function law , which describes the sand flow structure predominated by suspension .

实验测得0～20cm高度范围内风沙流输沙量较流沙地减少了80.2%，小气候及土壤等生态条件明显改善；

According to experiment , within the height of 0-20 cm , sand transport is reduced by 75.8 % , and environment , soil and other ecological conditions are obviously improved .

因此本文借助Fluent软件，对影响风沙流运动的诸多参数进行探讨，并基于这些参数来讨论影响风沙流垂直分布特征的因素。首先，介绍双流体模型中的基本控制方程。

So this paper investigate the parameters in windblown sand movement with the help of Fluent . And then discuss the factor effected on the distribution of mass flux in height based on these parameters . Firstly , introduce the basic control equations in two-phase model .

戈壁风沙流若干特征研究

A study on some characteristics of drifting sand flux over Gobi

塔克拉玛干沙漠风沙流定量研究

Quantitative study on sand flow by wind in Takla Makan desert

风沙流结构研究的敏感领域

The sensitive domain of research of wind - sand flow structure

砾漠大风地区风沙流研究

Study on sand Drift in Strong Wind Region in Gravel Desert

风沙流是一种典型的气固两相流。

The wind-blown sand movement is a typical gas-solid two-phase flow .

风沙流是危害乌吉铁路的主要形式；

Wind sand flow is the main calamity to the railway .

风沙流中颗粒跃移研究的某些进展与问题

Advances and Problems of Study on Saltation Particles in Wind Sand Current

当大量沙粒的运动便形成了风沙流。

The wind-sand flow develops when the number of moving particles becomes large .

风沙流中风速脉动对输沙量的影响

Effect of Wind Speed Fluctuation on Sand Transport Rate

风沙流对植物生长影响的研究

Research on the effects of wind - sand current on the plant growth

风沙流结构的研究

Study on Structure of wind - Sand Flow

风沙流结构的风洞实验研究风洞侧壁效应的油流观察研究

EXPERIMENTAL STUDY ON WIND SAND FLOW IN WINDTUNNEL Sidewall Effect for Transonic Airfoil Testing

褐黄色风成沙层类似我国内陆沙漠沙，该地沙漠风沙流的产物；

The brown-yellow wind generated sand layer was similar to our inland desert sands .

风沙流的实验研究和蠕移动的非线性动力分析

Experimental Research on Wind Sand Flow and Nonlinear Dynamical Characteristics of Bed Load Motion

热扩散和电场对风沙流发展过程的影响

Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow

在近百年内，沙丘不会埋没洞窟，但风沙流的危害仍十分严重。

But , the damages of wind-blown sand current will still be very serious .

风沙流中颗粒运动参数的分布特征

Stochastic Feature of Parameters of Particle Saltation Statistics of Particle Saltation Process in Air Flows

风-沙-电多场耦合模型及其对风沙流结构的影响

The coupled model of wind velocity-sand movement-electric field and its effects on the windblown sand cloud

植被沙障对近地表风沙流特征影响的风洞实验

Wind Tunnel Test about the Effect of Vegetation Sand-barrier on Wind-blown Sand Flow near Ground Surface

不同孔隙度尼龙网对风沙流减弱作用的风洞模拟

Simulation on Abated Effect of Nylon Net with Different Porosities on Wind-Blown Sand in Wind Tunnel

保护性耕作农田风沙流空间分布规律研究

Testing and research on space distribution rule of drifting sand flux on farmland with conservative tillage

兰新线玉门段戈壁风沙流地区铁路沙害的治理

Sand Hazard Control Aling Yumen Section of Lanzhou Xinjiang Railway in Gobi Wind & sand Stream Region