可引导自然风对流的不对称型地下通道
- 来源：新浪科技 时间：2008-05-05 22:01:08
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学科：工程学
作者姓名：方兴
年级：高一
学校：厦门双十中学
设计目的：利用自然风对流，驱除地下人行通道中湿气和异味，使通行舒畅，设备不易锈蚀，通道寿命延长。
研究的步骤：
1、通道设计(略)
分析：现有地下人行通道两边引道中气流速度一样，横道两侧压强相等，横道中气流不贯通。
设计一原理：右边引道中气流受到弯道阻碍，被引导向左流，形成单向贯通气流。
设计二原理：右边引道中因通风面积减小，气流加快，压强减小，而左边气流因直行受阻转向右流，形成合力，加快气流向右流动。
2、气流显示与风标改进(略)
3、实验数据(略)
结论：不对称型结构通道能引导自然风对流；
不耗电，环保节能；
工程可行性高。
Name of Programme: Asymmetric underpass which leads convection current
Subject: Engineering
Designed by: Fang Xing
Grade: Senior One
School: Xiamen Shuangshi High School
Aim: To remove the wet gas and unpleasant taste of the underpass using convection current. Thus it’ll make people feel more comfortable and protect the facility from erosion and extend the time of usage.
Step of Study:
Analysis: The current speed and the two sides’ pressure are both the same, along with the stillness of the air in the underpass.
Theory of Design One: The air from the right approach is hindered and thus altered to the left, forming one-way current through.
Theory of Design Two: The curtailment of space in the right approach makes the current speed faster and the air pressure smaller, while the left current is altered to the right because of the straight hindrance, thus forming the join force which promotes the current to flow right.
Conclusion: Such design makes use of asymmetric structure which leads the convection current in the aim of environmental protection and energy-saving along with easy operation.
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