Experiments on a Snow Transportation System with a Jet Pump

喷射泵雪输送系统实验

基本信息

批准号：
01850129
负责人：
YAMAGUCHI Hajime
金额：
$ 0.96万
依托单位：
Nagaoka College 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：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850129/
关键词：
Snow Removal Snow Transportation Pipe High Speed Air Flow Jet Pump Compressor Piping by Suction Piping by Compression 三相流二相流輸送管

项目摘要

A method of snow transportation through pipe line will be very useful to dispose or manage snow at narrow space such as in build-up areas and on roof tops where big machines like a snowplow and snow rotary are impossible to operate.Snow will be transported through pipe line with high speed flow of air in the pipe or pressure gradient between the both ends of the pipe.Jet pump operated with water from turbin pump can generate both negative pressure at inlet and positive at outlet comparing with atomosheric pressure.If the pipe line is connected to the inlet, both high speed flow of air and suction force arised from pressure gradient will be caused in the line. In this case, snow can be transported through the line in two-phase flow of snow and air.If the line is connected to the outlet, both high speed flow of water and air and compressive force will be caused in the line. In this case, snow can be transported in three-phase flow, and snow sticks very rarely in the line than the former case.High speed flow of air also can be generated with high pressured air flow from an air compressor. In this case, snow will be transported only by dragging of high speed flow of air in the line, so the faster the speed of the air flow the greater the ability of snow transportation. The distance of snow transportation is very easy to extend by series connecting some units of a compressor and line like this, because of two-phase flow in the line. For this connection, the power of compressors after second unit will be made smaller than the first unit.In any cases mentioned above, more effective methods of throwing snow into these lines should be developed immediately.

通过管道运输雪的方法对于在狭窄的空间中分配或管理雪将非常有用压力。如果管道线连接到入口，则在线路中会导致压力梯度引起的高速流量和吸力。在这种情况下，可以在雪和空气的两相流中通过线路运输雪。如果线连接到出口，则水和空气的高速流和压缩力都会在线路中引起。在这种情况下，可以在三相流中运输雪，而雪棒很少比以前的情况下的雪棒运输。还可以使用空气压缩机高的空气流量来产生高速速度。在这种情况下，只有通过在线路中拖动高速空气流量来运输降雪，因此空气流的速度越快，降雪的速度就越大。通过连接压缩机和这样的线路的某些单元，由于线路的两相流量，散落的距离很容易扩展。对于此连接，第二个单元之后的压缩机的功率将比第一个单元小。在上述任何情况下，将雪投入这些线的更有效方法应立即开发。