Abstract

In this paper, the eddy dissipation model was used to predict the exact behavior of reacting flow in a round jet burner. The results were validated and verified with available experimental and numerical data. To this end, the turbulence and combustion equations were solved using the k-ε/EDM model and the PIMPLE algorithm by means of OpenFoam package. In addition, by modifying the reactingFoam solver, the thermal NO_x equations were solved, and the equations of the P-1 radiation model were used to solve the radiation equations. After validating the numerical method, the effects of H₂O diluent injection rate and its location were studied on the temperature distribution and NO_x emission. The results revealed that as the injection rate of water vapor diluent increased, the temperature of the fluid decreased, and a decrease was observed in NO_x emissions in proportion to the temperature reduction. Increasing the diluent injection velocity had a negligible effect on the similarity distribution of temperature and NO_x mass fraction and the location of the maximum temperatures did not change much. The effects of diluent injection on reducing NO_x pollution were also seen upstream. As the diluent injection velocity increased, the effect of the diluent on the NO_x emission gradually were diminished.

摘要

在本文中，涡耗散模型用于预测圆形喷射燃烧器中反应流的确切行为。结果通过可用的实验和数值数据进行了验证和验证。为此，使用 k-ε/EDM 模型和借助 OpenFoam 包的 PIMPLE 算法求解湍流和燃烧方程。此外，通过修改reactingFoam求解器求解热力NO _x方程，利用P-1辐射模型的方程求解辐射方程。在验证了数值方法后，研究了H _{2 O稀释剂喷射速率及其位置对温度分布和NO x的影响。}排放。结果表明，随着水蒸气稀释剂注入率的增加，流体温度降低，并且观察到与温度降低成比例的 NOx 排放量_{减少。增加稀释剂喷射速度对温度和NO x}质量分数的相似分布的影响可以忽略不计，最高温度的位置没有太大变化。上游还可以看到稀释剂注入对减少 NOx 污染_的影响。随着稀释剂喷射速度的增加，稀释剂对NOx排放的影响_逐渐减弱。