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| Study on the Wind Tunnel Testing of Air Cushion Effect of High-Speed and Long-Runout Landslide |
| XING Ai-Guo-1, YIN Yue-Ping-2, QI Chao-1, ZHANG Ming-3, HUANG Han-Jie-4, HAN Jin-Liang-3 |
| (1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. China Geological Survey, Beijing 100011, China; 3. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China; 4. China Aerodynamics Research & Development Center，Mianyang 621000， Sichuan, China) |
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Abstract Many high-speed and long-runout landslides could fly in the air at the start-range stage, which has a significant effect of aero-dynamics. A wing model which is similar to sliding mass and a wing tunnel testing are made to determine the influence of aerodynamic effect and aerodynamic parameters. In the testing, valley terrain with different slopes and cross-sections can be made of wooden material. The results of wind tunnel testing show that aerodynamic properties of high-speed landslide are significant by the air cushion effect. Because of the different valley terrain, lift coefficient will dramatically increase when the around mountains get to closer. Therefore, vertical lift of high-speed sliding mass is increased, but it’s not obvious in flat terrain. The variations of lift-drag ratio in different valley terrains are basically the same, and the maximum values happen when angles of attack equal to 8°.
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Received: 12 October 2011
Published: 30 October 2012
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