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中国沙漠 ›› 1996, Vol. 16 ›› Issue (4): 360-363.

• 研究论文 • 上一篇    下一篇

纵向沙丘和横向沙丘模拟流场的实验研究

李志忠1,2, 关有志3   

  1. 1. 南京大学大地海洋科学系, 南京 210093;
    2. 新疆师范大学地理系, 乌鲁木齐 830053;
    3. 中国科学院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1995-11-13 修回日期:1996-03-18 出版日期:1996-12-20 发布日期:1996-12-20
  • 作者简介:李志忠男,1962年生,副教授,理学博士。主要从事干旱区地貌与第四纪地质研究。
  • 基金资助:
    国家科技攻关项目(85-101-07-07)资助

EXPERIMENTAL STUDY ON IMITATIVE FLOW PATTERN OF LONGITUDINAL DUNES AND TRANSVERSE DUNES

Li Zhizhong1,2, Guan Youzhi3   

  1. 1. Department of Geo & Ocean Sciences, Nanjing University, Nanjing 210093;
    2. Department of Geography, Xingjiang Normal University, Urumqi 830053;
    3. Institute of Desert Research, Academia Sinica, Lanzhou 730000
  • Received:1995-11-13 Revised:1996-03-18 Online:1996-12-20 Published:1996-12-20

摘要: 实验选用半圆柱体沙丘模型脊线与风洞实验段风向构成6组不同大小的交角, 通过对其纯气流绕流流场、表面压力分布以及风沙堆积形态的观测和分析, 查明了纵向沙丘和横向沙丘模拟流场的结构特征。模拟结果可与野外观测资料对比

关键词: 纵向沙丘, 横向沙丘, 风洞实验, 模拟流场

Abstract: During the experiment in the wind-tunnel, 6 angles between the trend of the model and the wind orientation were constituted. Through observing and analysing the pure flow pattern, pressure distribution and aeolian depositional form around the dune model under these six circumstances, the characteristics of flow pattern on the surface of longitudinal dunes and transverse dunes have been provided. On the whole, the differences between these 2 flow patterns are that the intensive sideward flow and returning eddy exist on the lee side of longitudinal dunes.

Key words: Longitudinal dunes, Transverse dunes, Wind-tunnel experiment, Imitative flow pattern