管道燃气快烤装置燃烧过程数值仿真及结构参数影响分析

Numerical Simulate and Influent Analysis of structural parameters on combustion process of Pipeline Gas Burner for fast cook-off test

摘要:

快烤试验装置作为快烤试验的重要组成部分,其产生的火焰温度对试验结果有很大的影响。为设计管道燃气快烤装置,利用Fluent软件、采用SST k-ω湍流模型和非预混燃烧模型,开展管道燃气装置燃烧过程仿真和关键结构参数对火焰温度及其均匀性的影响规律研究。选择三个关键参数即管道间距h1、火孔孔径Φ、火孔孔距h2,设计了三因素三水平正交试验进行仿真。研究结果表明:在管道直径确定的条件下,管道间距是影响管道燃烧器火焰温度均匀性的最主要因素,其次是火孔间距,火孔孔径是影响火焰温度均匀性的最次要因素；管道燃烧器上方不同高度处火焰温度均匀性对应的最佳结构参数并不相同。

Abstract:

As an important part of the fast cook-off test, the flame temperature produced by the fast cook-off test device has a great influence on the test result. In order to design the pipeline gas burner for fast cook-off test , the influence of key structural parameters on flame temperature and uniformity was studied by using Fluent software, SST k-ω turbulence model and non-premixed combustion model. A three-factor and three-level orthogonal experiment was designed for the simulation. The three key factors were selected: pipe spacing h1, fire hole diameter Φ, and fire hole spacing h2. The results show that the pipe spacing is the most important factor affecting the flame temperature uniformity of the pipe burner, followed by the fire hole spacing, and the fire hole diameter is the least important factor. The optimal structural parameters corresponding to the flame temperature uniformity at different heights above the pipeline burner are not the same.