碩士生: 許中豪
畢業年月: 2021年6月
論文名稱: 氧化亞氮分解反應對於氧化亞氮/乙烯 反置擴散火焰中煙粒生成之影響 / Effect of nitrous oxide decomposition reaction on soot formation of nitrous oxide/ethylene inverse diffusion flames
中文摘要:
本研究以實驗探討氧化亞氮（N2O）分解反應對N2O/乙烯反置擴散火焰煤煙生成的影響。N2O分解被視為富氧效應與放熱的熱效應之組合，實驗以三環噴流燃燒器，在氧化劑流速比R = 0至6下，比較N2O、完全分解條件（33% O2、67% N2）與空氣條件（21% O2、79% N2），並以雷射誘導白熾光量測煤煙濃度、以雙色高溫法量測煤煙溫度。結果顯示N2O分解促進煤煙生成：熱效應的影響隨R增加，最高達40%，且上游煤煙溫度明顯升高；富氧效應的影響則隨R由10%提升至60%。沿火焰高度積分顯示，煤煙生成與氧化速率可能因N2O分解而重新平衡。
英文摘要:
This thesis experimentally investigates how nitrous oxide (N2O) decomposition affects soot formation in N2O/ethylene inverse diffusion flames. Decomposition is treated as an oxy-enrichment effect plus an exothermic thermal effect, and is isolated by comparing N2O with a fully decomposed mixture (33% O2/67% N2) and air (21% O2/79% N2) in a triple-port burner over oxidizer ratios R = 0 to 6. Soot concentration is measured by laser-induced incandescence and soot temperature by two-color pyrometry. N2O decomposition raises soot loading; the thermal effect grows with R, reaching a maximum impact of 40%, and soot temperature rises markedly upstream. The oxy-enrichment effect strengthens from 10% to 60% with R, and integrated soot profiles suggest that soot formation and oxidation rates may rebalance.
