Novec 1230灭火剂的施放方法研究.docVIP

Novec 1230灭火剂的施放方法研究 摘要为进一步探究Novec1230的施放方法和施放效果，了解其在管道流动中的沿程阻力损失，用性质相近的清水来代替Novec1230为实验试剂，从灭火剂气液比，管道长度及喷口孔径三个方面测量管道的压力差，采用控制变量法，通过对实验数据的分析，研究管道压力差和气液比，管道长度及喷口孔径的基本关系，进而得到管道沿程阻力损失和这三个参数的基本关系，分析在喷射效果最好时灭火剂所处的状态，其最终目的是为了控制流量，为Novec1230灭火剂管道的设计作基础。实验表明，存在一个最佳装样量V在1000ml附近，使得管道阻力损失达到最大，即流量达到最大值，此时施放效果最佳；管道阻力损失随着测量长度的增大而增大，随着孔径的增大也增大。7871 关键词Novec1230灭火剂清水施放方法沿程阻力损失 毕业设计说明书（论文）外文摘要 TitleExploring The Casting Method Of Novec1230 Abstract In order to further explore the casting method and casting animation of Novec1230 and understand the losses of frictional resistance when it flows in pipe, we use water with similar nature instead of Novec1230 as experimental reagent to measure the different pipeline pressure from three aspects of extinguisher gas' liquid ratio, pipe length and vent aperture. We get the basic relationship between the losses of frictional resistance and the three parameters through the method of control variables, the analysis of experimental data, the research of relations between pipeline pressure and gas-liquid ratio, pipe length and the nozzle aperture. The ultimate goal of analysis of the state of extinguishing agent when it’s spraying effect is best to control the flow, which is the basis for the design of Novec1230 extinguishing agent's pipeline.Experiments show that there is an optimum sample loading volume about 1000 milliliter, making the loss of the piping resistance for maximum, that is, the flow reaches its maximum,at this time it makes the best cast effect. The loss of the piping resistance increases with the measurement of length increasing, also increases with the increase of aperture. 4.5.3管道沿程阻力损失与管道长度关系研究30 4.5.4压力差与测量长度关系研究34 4.5.5管道沿程阻力损失与孔径大小的关系研究35 结论42 致谢43 参 考 文 献44 1绪论 1.1课题目的及意义 当下，人们对生存环境的依赖性和要求越来越高，希望能生活在蔚蓝的天空下，呼吸着新鲜空气，然而大部分的灭火剂对环境的危害依然比较大，威胁到了人们的健康，因此寻找一种能长期使用且对环境没有影响或者影响极小的灭火剂迫在眉睫。 衡量灭火药剂对环境的危害主要包括三个方面：对臭氧层的破坏、温室效应所造成的全球气候变化，哈龙灭火剂对臭氧层破坏严重，已被全面淘汰，氟代烷和全氟代烷替代物在全球温室效应和影响气候方面仍存在着问题, 因而又像哈龙一样面临着被禁止使用和被淘汰取代的命