卷期 : 43 / 4
出版年 : 2015/10/01
燃燒室為渦輪發動機的動力核心,近年來燃燒室之設計趨勢為具較緊緻的空間、高燃燒效率、低出口溫度型態係數(Pattern Factor, PF)及低汙染。此設計技術結合了三維燃燒室模擬分析、燃油噴嘴霧化、燃燒室襯筒冷卻、燃燒控制及緊緻的燃燒室構型設計等科技。在燃燒室設計上,由於設計參數彼此間互相影響,因此必須使用先進的設計分析技術,以開發出汙染小、效率高的燃燒室。航空所雖然已建立了一套完整的傳統渦輪發動機燃燒室設計工具,並於渦輪扇發動機之研發中完成驗證,但仍需不斷提升設計工具精度,利用燃燒室機架試驗數據,建立完整的燃燒室設計資料庫。未來渦輪發動機燃燒室將採用極緊緻設計,利用壓縮器出口至渦輪入口之狹小空間,以周邊及徑向穴區產生燃燒及助焰效果,並有效控制排出廢氣之組成。 The combustor is one of main components used to generate power in a gas turbine. The current design of combustor is tending to shorter axial length, smaller space, high efficiency, low pattern factor and low emissions. This paper describes the combustor technology including advanced 3D combustion simulation, fuel spray characteristics, long life for combustor liner design and manufacture, advanced combustion control technology and new design of combustor configurations. Because of the interaction of design parameters, a more advanced technology is required to design a combustor for high efficiency low emissions. Although ASRD has been developing the software design tool for gas turbine combustor, and the software has been verified in the turbofan engine development program, databases in the design of combustor are still being built by conducting the rig tests to progressively improve the software design tool. The potential for the ultra-compact combustor, which shorten the axial length between compressor exit and turbine inlet, lie in the future to improve combustion efficiency and control of emissions.
關鍵詞 : 極緊緻燃燒室(Ultra-Compact Combustor)、渦輪扇發動機(Turbofan Engine)