軌道散水消雪用に試作した変流量スプリンクラの特性

抄録

The experimental study was conducted to investigate the performance of a prototype sprinkler for melting snow or railway tracks at various pressures. The heat loss in flying water droplets and the performance of the sprinkler were theoretically obtained. The mean diameters of water droplets were measured at different water flow rates by photography : they were 5∼6 mmφat the initial speed of 11.5∼16.0 m/s. The temperature drop of the droplet is about 0.2°C/m in flight through air at 0°C. In this sprinkler, the distribution of sprinkled water is kept uniform regardless of the water flow rate.