Development of Snow Fence based on Aerodynamic Characteristics of Cross-sectional Shape of Road to Prevent from Snowstorm

基于道路断面形状气动特性的防雪栅栏开发

• 批准号: 05558041
• 负责人: HANIU Hiroyuki
• 金额: $ 3.26万
• 依托单位: Kitami Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05558041/
• 关键词: Blow off type snow fence; Ground Blizzard; Visibilty Blockage; Traffic Blockage; Highly piled up Road; Image Processing; Perfolated Plate; Control of Separated Shear Layr; 吹き払い防雪柵

The purpose of the present study was to develop the snow fance (blow off type) with an optimum configuration for preventation of the snowdrifts and inprovement of visibility on roadways. The design was made in accordance with fluid dynamic principles, and its performance was evaluated by the blowing-snow simulation in a wind tunnel wich uses real snow particles and by towing tank for flow visualization. In order to conduct the experiments, image processing techniques were also developed.The snowdrifts and visibility blockage behind the snow fance were found to be caused by the rolling-up of the gap flow passing through the bottom part of the fence. It was found that the rolling-up of the bottom gap flow could be prevented by controlling a shear layr separated from the top part. In accordance with this finding, several types of snow fences were designed with the objective of the controlling their shear layr. As a result, it was found that a perfolated plate replaced the plate located very top part of the fence can yields considerable improve in visibilty.In the present study, another type of fences were developped and tested. This type is designed to use momentum of on comming wind movement instead of blocking flow motion as many old types of fence behave. In order to use wind momentum, cambered wing shaped plaptes with large angle of attack were emploied. As a results, it was found that the wing shaped plates elminate stagnant region of flow behind the fance, and weaken the roll up of shear laryer, and then increases blow off effect on the roadway. Hence, with this type of snow fence, furthe improvement of visibility in snowstorm is obtained.

本研究的目的是开发具有最佳结构的防雪栅（吹离型），以防止雪堆和改善道路上的能见度。根据流体动力学原理进行了设计，并通过在风洞中使用真实的雪颗粒进行吹雪模拟和通过拖曳水池进行流动显示来评估其性能。为了进行实验，还开发了图像处理技术，发现雪栅栏后面的雪堆和能见度障碍是由通过栅栏底部的差距流卷起引起的。研究发现，通过控制与顶部分离的剪切层，可以防止底部间隙流的卷起。根据这一发现，设计了几种类型的防雪栅栏，目的是控制它们的剪切层。结果表明，用穿孔板代替栅栏顶部的穿孔板可以显著提高栅栏的性能。这种类型的设计是利用对来风运动的动量，而不是阻止流动运动，因为许多旧类型的栅栏的行为。为了充分利用风的动量，采用了大攻角的弧形翼片。结果表明，翼形板消除了翼后的滞流区，减弱了剪切层的卷起，从而增加了对巷道的吹离作用。因此，这种类型的防雪栅栏，进一步改善能见度在暴风雪中获得。

项目成果

羽二生博之、板本弘志、他: "部分有孔板を用いた吹き払い防雪柵による視程障害の軽減" 第7回寒地環境工学合同シンポジウム講演論文集. 71-80 (1994)

Hiroyuki Hanyu，Hiroshi Itamoto，等：“使用部分穿孔板通过吹雪栅栏减少能见度”第七届寒冷地区环境工程联合研讨会论文集71-80（1994）。

坂本弘志、羽二生博之、他2名: "大迎角翼型防雪板を有する高性能防雪棚の開発" 第8回寒地環境工学合同シンポジウム講演論文集. (1995)

坂本宏、羽生宏之等2人：“大迎角机翼型防雪板高性能防雪架的研制”第八届寒地环境工程联合学术研讨会论文集（1995）。

Sakamoto H.and Haniu H.et al.: "Development of high performance snow fence with wing shaped plates at large angle of attack." Proceedings of 8th environmental and cold region symposium. (to be published). (1995)

Sakamoto H.和Haniu H.等人：“大攻角翼形板高性能雪栅的开发”。

羽二生博之、坂本弘志、他2名: "部分有孔板を用いた吹き払い防雪棚による視程障害の軽減" 第7回寒地環境工学合同シンポジウム講演論文集. 71-80 (1994)

Hiroyuki Hanyu、Hiroshi Sakamoto 等 2 人：“使用部分穿孔板吹掉雪架来减少能见度障碍”第七届寒冷地区环境工程联合研讨会论文集 71-80（1994 年）。

Haniu H.and Sakamoto H.et al.: "Improvement of visibility by using blow off type snow fence with partially used perforated plate" Proceedings of 7th environmental and cold region symposium. 71-81 (1994)

Haniu H.和Sakamoto H.等：“使用部分使用穿孔板的防风型雪栅提高能见度”第七届环境与寒冷地区研讨会论文集。