軸向燃料噴注方式的漩渦火焰在過去數十年來被廣泛地研究著，研究發現此類型的火焰具有快速的燃料－空氣混合特性、高燃燒穩定性與低NOx 生成的優點，但也同時具有溫度分佈不均勻與CO生成量過高的缺點。此篇論文以停滯流燃料噴注方式來研究新型態的漩渦火焰特性，主要目的是想藉由停滯流平板的存在來增加火焰的均勻高溫區分佈，並藉著高溫區的增加來降低CO的生成。實驗結果發現停滯流燃料噴注方式的漩渦火焰在特定的操作區間內有極為均勻的高溫區分佈，且在相同最低NO生成量的前提下，其CO的生成量約降低為使用軸向燃料噴注方式漩渦火焰的1/5，成功地改善了軸向燃料噴注方式漩渦火焰的兩大缺點。

The swirl flame with axial fuel injection has been intensively investigated in the past few decades. It is found that the swirl flame with axial fuel flow injection has major advantages of fast fuel-air mixing rate, enhanced combustion stability and low NOx emission. However, the swirl flame with axial fuel flow injection has some shortcomings: non-uniform distribution of temperature field and excessive emission of carbon monoxide. In this investigation a new type of swirl flame with stagnation fuel flow injection is reported here. The major purposes are to extend regions of uniform high temperature and to decrease the emission of carbon monoxide by means of a stagnation plate above the fuel exit. It is found that the swirl flame with stagnation fuel flow injection yields extended regions of uniformly high-temperature and about one fifth of carbon monoxide emissions with the lowest NO emission in comparison with axial fuel flow injection case. The two major disadvantages of the swirl flame with axial fuel injection are improved and demonstrated successfully.

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