後燃器之燃燒室流場一般操作於高速、高溫之條件下，以數值模擬方法來分析其流場中的燃燒與熱傳現象，可以輔助實驗上的參數測試次數，以降低其成本，因此本研究將以數值模擬方法探討在噴霧燃燒情形下，流場變化與後燃器隔熱襯筒間的相互關係，結果發現隔熱襯筒上的變化造就不同的薄膜冷卻效果。在本文中採用了不同冷卻流道進口速度，且在隔熱襯筒隙縫上做些變化，而流孔的形式上採用隙縫模式，結果發現在較快的冷卻流道流速與隙縫較寬的情形之下，薄膜冷卻效果較佳。此研究為在包含駐焰器、隔熱襯筒、且在噴霧燃燒下進行模擬，與真實之後燃器之操作條件極為相似，可作為一提供後燃器實驗上探討的輔助工具。

The afterburner is usually operated under the high-speed and high-temperature conditions. In order to reduce the costly experimental attempts for parameter analyses, a simulation model was proposed to investigate the combustion and heat transfer phenomena in the flow field of the afterburner. In this study, the interaction of flow-field variation and liner under spray combustion was calculated by the simulation model. The results shown that the variation of liner leaded to different cooling effect. In this study, the different inlet velocities of cooling flow were applied. Consequently, the effects of different slot liners were also discussed. The results indicated that the faster cooling flow velocity and wider liner slot leaded to better cooling performance. The model proposed by this study, which takes into account the flame holder, liner those in spray combustion, and operation under the conditions similar to the real afterburner, can be utilized as an auxiliary tool to the experimental investigation.

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