摘要火旋风是一种旋转火焰，是旋转气流与火焰耦合时产生的一种特殊的燃烧形式。火旋风是一种特殊的火行为现象，它在运动学方面表现出很高的空气卷吸率，在燃烧行为上表现出很高的燃烧温度，燃烧速率和火焰高度。火旋风对火场中的空气流动比较敏感，不同的进风口高度会在火场中产生不同的空气流动，从而影响火旋风的燃烧特性。为了研究进风口高度对火旋风燃烧特性的影响，本文设计了五组实验，利用六侧缝水平槽道火旋风发生装置分别在五组不同的进风口高度下创造出火旋风，然后通过比较各组实验现象，分析各组实验数据，发现随着进风口高度的增加，火旋风形成所需要的时间越来越长，持续时间越来越短.各组形成火旋风的高度和强度随进风口高度的增加呈现下降的特点，因此，进风口高度为0cm时，形成的火旋风持续时间长，高度较高，强大较大。此外，本文还就进风口高度对火旋风燃烧特性的影响作了简单的定性分析。63636

毕业论文关键词 ：火旋风  进风口高度  燃烧特性

毕业设计说明书（论文）外文摘要

Title Fire burning characteristics of fire whirlwind air inlet height experimental study

Abstract

Fire whirl is a kind of rotary flame ，it’s a kind of special combustion produced by rotating airflow and flame coupling. Fire whirl is a kind of special fire behavior.It showed high air entrainment rate in kinematics and high combustion temperature, high burning rate , high flame height in the combustion behavior.Fire whirl  is more sensitive to the air flow, different inlet height will produce different air flow in fire, which affects the combustion characteristic of fire whirl .In order to study the effect of cyclone inlet height in fire combustion characteristics . This paper was designed to get five experiments,.through utilization of six level of side seam the fire whirl generator,the fire whirl was created 

in five groups respectively under different inlet heights , then by comparing groups of experimental phenomena, analysis  experimental data of each group , it is found that the higher air inlet height is , the longer time the fire whirl formed, the shorter time it lasted  The height and intensity of the formation of the fire whirl dropped with the increase of inlet height . Therefore, when the inlet height is 0 cm, ,the fire whirl lasts long ,the height is higher  and the intensity is  stronger  .In addition, the influence of the inlet height to the combustion characteristic of fire whirl was simply  qualitatively analysed  in this article.

目  录

1  引言 1

1.1  本课题研究背景 1

1.2  国内外关于火旋风的研究进展 1

1.3   现阶段研究现状的总结和不足 4

2  实验 4

2.1  实验装置介绍 4

2.2  测试仪器 5

2.2.1  电子天平 5

2.2.2  线性风速仪 5

2.2.3  K型热电偶和数据采集系统 5

2.2.4  燃料介绍---正庚烷 5

2.3  实验方法介绍 5

2.4  实验方案 6

2.4.1  设置五个不同进风口高度 6

2.4.2  燃烧温度的测量