Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport
文献类型：期刊论文
| 作者 | Kang LQ; Guo LJ; Gu ZM; Liu DY(刘大有)
|
| 刊名 | Geomorphology
 |
| 出版日期 | 2008 |
| 页码 | 438-450 |
| 通讯作者邮箱 | klq@sohu.com |
| 关键词 | Pdpa Aeolian Sand Transport Sand Velocity Probability Distribution Wind Tunnel Saltating Grains Blown Sand Surface Collisions Particles Cloud Flux Bed Entrainment Simulation |
| ISSN号 | 0169-555X |
| 通讯作者 | Kang, LQ (reprint author), Chinese Acad Sci, Inst Mech, Div Engn Sci, Beijing 100080, Peoples R China. |
| 中文摘要 | Sand velocity in aeolian sand transport was measured using the laser Doppler technique of PDPA (Phase Doppler Particle Analyzer) in a wind tunnel. The sand velocity profile, probability distribution of particle velocity, particle velocity fluctuation and particle turbulence were analyzed in detail. The experimental results verified that the sand horizontal velocity profile can be expressed by a logarithmic function above 0.01 in, while a deviation occurs below 0.01 m. The mean vertical velocity of grains generally ranges from -0.2 m/s to 0.2 m/s, and is downward at the lower height, upward at the higher height. The probability distributions of the horizontal velocity of ascending and descending particles have a typical peak and are right-skewed at a height of 4 turn in the lower part of saltation layer. The vertical profile of the horizontal RMS velocity fluctuation of particles shows a single peak. The horizontal RMS velocity fluctuation of sand particles is generally larger than the vertical RMS velocity fluctuation. The RMS velocity fluctuations of grains in both horizontal and vertical directions increase with wind velocity. The particle turbulence intensity decreases with height. The present investigation is helpful in understanding the sand movement mechanism in windblown sand transport and also provides a reference for the study of blowing sand velocity. (C) 2007 Elsevier B.V All rights reserved. |
| 类目[WOS] | Geography, Physical ; Geosciences, Multidisciplinary |
| 研究领域[WOS] | Physical Geography ; Geology |
| 关键词[WOS] | SALTATING GRAINS ; BLOWN SAND ; SURFACE ; COLLISIONS ; PARTICLES ; CLOUD ; FLUX ; BED ; ENTRAINMENT ; SIMULATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000256719500013 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26006]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Kang LQ,Guo LJ,Gu ZM,et al. Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport[J]. Geomorphology,2008:438-450. |
| APA | Kang LQ,Guo LJ,Gu ZM,&刘大有.(2008).Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport.Geomorphology,438-450. |
| MLA | Kang LQ,et al."Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport".Geomorphology (2008):438-450. |
入库方式： OAI收割
来源：力学研究所
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