燃烧科学与技术
燃燒科學與技術
연소과학여기술
JOURNAL OF COMBUSTION SCIENCE AND TECHNOLOGY
2015年
2期
173-178
,共6页
MILD燃烧%射流火焰%热伴流%污染物排放%数值模拟
MILD燃燒%射流火燄%熱伴流%汙染物排放%數值模擬
MILD연소%사류화염%열반류%오염물배방%수치모의
MILD combustion%jet flame%hot coflow%pollutant emissions%numerical simulation
采用自定义的κ-ε模型，选择基于详细化学机理Gri-Mech 3.0的EDC模型对CH4/H2混合燃料热伴流射流燃烧过程进行数值模拟，模拟结果与实验结果相吻合．通过改变模拟计算中的热伴流氧质量分数，研究在稀释条件下氧质量分数对燃烧效率和污染物排放的影响．结果表明，在稀释条件下，反应区的最高温度和 CO 排放量随着热伴流氧质量分数的增大呈线性增长，而NO的排放量呈指数增长．
採用自定義的κ-ε模型，選擇基于詳細化學機理Gri-Mech 3.0的EDC模型對CH4/H2混閤燃料熱伴流射流燃燒過程進行數值模擬，模擬結果與實驗結果相吻閤．通過改變模擬計算中的熱伴流氧質量分數，研究在稀釋條件下氧質量分數對燃燒效率和汙染物排放的影響．結果錶明，在稀釋條件下，反應區的最高溫度和 CO 排放量隨著熱伴流氧質量分數的增大呈線性增長，而NO的排放量呈指數增長．
채용자정의적κ-ε모형，선택기우상세화학궤리Gri-Mech 3.0적EDC모형대CH4/H2혼합연료열반류사류연소과정진행수치모의，모의결과여실험결과상문합．통과개변모의계산중적열반류양질량분수，연구재희석조건하양질량분수대연소효솔화오염물배방적영향．결과표명，재희석조건하，반응구적최고온도화 CO 배방량수착열반류양질량분수적증대정선성증장，이NO적배방량정지수증장．
This article uses the customκ-εmodel and selects the EDC model based on a detailed chemical mechanism Gri-Mech 3. 0 to simulate the combustion process of a CH4/H2 jet flame in hot coflow. Compared with the experimen-tal results,the simulation results verify the rationality of the numerical model. By changing oxygen mass fraction of hot coflow in simulation calculation,the influence of diluted oxygen mass fraction on combustion efficiency and pollutant emissions is studied. The research shows that under the diluted condition,the highest temperature of reac-tion zone and CO emissions increase linearly with the increase of oxygen mass fraction of hot coflow,while NO emissions increase exponentially.
