Spray generation a wave absorbing sea wall under s strong wind and transport process of spray in the leeward direction.

浪花在强风作用下形成吸浪海堤，并在背风方向输送浪花的过程。

基本信息

批准号：
07650604
负责人：
MATSUNAGA Nobuhiro
金额：
$ 1.34万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650604/
关键词：
Coastal environments Salt damege Sea water spray 沿岸海域環境沿岸構造物物質輸送

项目摘要

Studies of 'Spray generation from a wave absorbing sea wall under a strong wind and transport process of spary in the leeward direction' have been made with the aid of a grant form the Ministry of Education, Science, Sports and Culture. The results are summarized as follows.1.Spray generation and transport process from a wave absorbing sea wall.2.Model experiments were carried out for a wave absorbing sea wall with a standard cross-section which is built at Beppu Port in Oita Prefecture.1) Near the sea wall, the spray concentration is determined by the equilibrium between the advection of spray and its sedimentation. In a region far from the sea wall, the spray becomes very small and is in the equilibrium between its advection and diffusion.2) A flow chart is obtained to estimate the spray concentration near a sea wall.2.Transport process of spray above a beach model.It is very important to understand the difference between the transport processes of spray above a natural beach and a beach protected by man-made structures. From such a point of view, the transport process of spray above a beach model was investigated experimentally.1) In an offshore zone, the vertical profiles of spray quantity and spray concentration are uniform in the leeward direction. They are determined by the balance between the diffusion of spray and its sedimentation.2) In a shallow region, the balance in an offshore zone is broken and the concentration decreases rapidly in the leeward direction.3) Above the ground, the balance between the advection of spray and its diffusion is formed because no spray is supplied from the lower boundary and very small spray is transported.

研究了“在强烈的风向下，在风向沿风向吸收海墙的喷雾产生”的研究是在教育，科学，体育和文化部的赠款中进行的。结果总结如下。1。从吸收海壁的喷涂生成和运输过程。2。模型实验，以吸收波浪吸收的海壁，其标准横截面是在OITA县的Beppu端口建造的。1）在海壁附近，海墙附近，喷雾浓度由喷雾剂及其喷雾剂及其压力之间的平衡确定。在远离海墙的区域中，喷雾变得很小，在其对流和扩散之间处于平衡状态。2）获得流程图，以估算海墙附近的喷雾浓度。2。在海滩模型上方喷雾的传输过程。这对于了解自然海滩上的喷雾海滩和由人工制造结构的海滩保护的差异非常重要。从这样的角度来看，通过实验研究了海滩模型上方的喷雾的运输过程。1）在离岸区域中，喷雾量和喷雾浓度的垂直轮廓在背风方向上是均匀的。它们取决于喷雾剂的扩散与沉降之间的平衡。2）在浅区域中，离岸区域中的平衡被损坏，浓度在背风方向上迅速降低。3）在地面上方，由于从下边界和非常小的喷雾中提供了喷雾剂之间的喷雾及其扩散之间的平衡。