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大流量的水射流已广泛用于消防领域。试验证明,对于一个喷咀有一个最合适的喷射压力,超过该压力,虽然流量有所增加,但射流中相当一部分水以雾化的形式沿着喷射方向散落,从而降低了喷射效率。所以设计合理结构的喷咀,可以提高消防喷射器的喷射效率。 本文要介绍各种不同流道剖面的喷咀及所得到的射流特性。 图1中1～10号喷咀是列举试验喷咀的剖面形状。内壁涂有含金属的环氧树脂,表面光洁度较高。
Large flow of water jet has been widely used in the field of fire. Experiments have shown that there is a suitable injection pressure for a nozzle beyond which, although the flow rate is increased, a considerable portion of the water in the jet falls in the spray direction in the form of atomization, thereby reducing the ejection efficiency. Therefore, the design of a reasonable structure of the nozzle, you can improve the fire jet injection efficiency. This article describes the nozzles and the resulting jet characteristics for various flow path profiles. The nozzles No. 1 to No. 10 in Fig. 1 are the cross-sectional shapes of the test nozzles. The inner wall coated with a metal-containing epoxy resin, surface finish higher.