在現今交通運輸產業已經成熟的時代裡，人們對大眾運輸系統的需求也逐漸擴大，而在航空運輸中，2021年全球交通運輸業的二氧化碳總排放量相比於2020年增加了5500萬噸左右，其中航空業就占了9.28%，僅次於公路運輸，因此永續與環保成為了航空業的首要目標。旋流器作為航空引擎燃燒室中的關鍵部件，有助於提升燃燒效率，使空氣與燃油充分混合，而永續航空燃料(SAF)的推出進一步推動航空業邁向減碳目標與永續發展。但如何在傳統航空燃油與SAF混合之下搭配不同的旋流器葉片角度達到最佳排放，仍然是當前需要研究的課題。本研究探討旋流器葉片角度對於Jet A-1與SAF混合燃料的燃燒所帶來的影響，藉由火焰影像與OH*化學發光分佈，排放部分由傅立葉紅外光譜儀(FTIR)測量分析。實驗結果顯示，隨著葉片角度增大，火焰形狀變寬，混合SAF後相對穩定且分布更均勻，火焰主反應區的顏色由藍色轉為偏白色且局部火焰消失，葉片角度60度因燃燒集中在燃燒室底部，呈現局部高溫的情況發生，將會影響燃燒室使用週期。OH*化學發光隨葉片角度增加以及SAF比例的增加往徑向擴展且發光主反應區更為強烈且集中，燃燒效率提升，但加入SAF後仍無法抑制在過高當量比下燃燒的劣勢。排放方面，隨SAF比例增加，提高葉片角度能顯著降低當量比低於0.8及約1.2時的CO排放。NO排放因SAF優勢加上強旋流進一步抑制火焰溫度而下降，但在高SAF比例下，葉片角45度至60度對低當量比的減排效果不明顯。UHC排放隨SAF比例增加及葉片角度提高協同減少，但當量比超過0.8時減排效果有限。整體而言，SAF混合比例達50%時，葉片角度提升至45度的綜合表現優於60度，並有助於延長燃燒室使用壽命。

The aviation industry, contributing 9.28% of global transportation CO₂ emissions in 2021, prioritizes sustainability. Swirlers, crucial for efficient combustion, influence emissions and fuel-air mixing. This study examines the effect of swirler vane angles on the combustion and emissions characteristics of Jet A-1 blended with Sustainable Aviation Fuel (SAF). Experiments were conducted using flame visualization and OH* chemiluminescence to assess combustion characteristics, while emissions were analyzed via Fourier Transform Infrared (FTIR) spectroscopy. The study investigated varying swirler vane angles (30°–60°) and SAF blending ratios. Results indicate that increasing the vane angle broadens the flame structure. SAF enhances flame stability and cleanliness, shifting the primary reaction zone from blue to a whitish hues. At 60°, localized high temperatures near the combustor base may reduce component lifespan. OH* chemiluminescence expands radially with higher vane angles and SAF content, signifying improved combustion efficiency. However, at high equivalence ratios, SAF does not fully mitigate combustion disadvantages. CO emissions are significantly reduced at equivalence ratios below 0.8 and around 1.2, while NO emissions decrease due to flame temperature suppression. UHC emissions decline with increasing SAF content and vane angle, though reduction is limited beyond an equivalence ratio of 0.8. Overall, a 50% SAF blend with a 45° vane angle optimally balances emissions and combustor longevity, outperforming 60° configurations. These findings support SAF integration and swirler design optimization for sustainable aviation.

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