中文摘要：

在传统涡扇发动机外涵安装12个内径68 mm的脉冲爆震燃烧室（PDCs）作为加力燃烧室,排气方式有2种,即分别排气和混合排气,建立了相应的热力性能分析模型,应用所建立的模型,计算了不同飞行状态下的性能。计算结果表明：在设计点条件下,与分别排气涡扇发动机相比,外涵装有PDCs的分别排气涡扇发动机模型（PS模型）的单位推力（Fs）提高127.6%,混合排气发动机模型（PM模型）的Fs提高74.6%,单位燃油消耗率（sfc）较传统带加力的涡扇发动机低。飞行高度一定随着飞行马赫数的增加,脉冲爆震外涵加力涡扇发动机Fs减小,sfc增加;飞行马赫数一定随着飞行高度的增加,PS模型的Fs减小,sfc增加,而PM模型的Fs缓慢增加,sfc缓慢减小。飞行马赫数、飞行高度均较低时,PS模型的工作性能显示了明显的优越性,而PM模型可以在很宽的工作范围内保持优越且稳定的工作性能。

英文摘要：

Aim.In the introduction of the full paper,we point out what we believe to be the need for developing a suitable method of the calculation of the thermodynamic performance of TFE with PDCs in BD.12 PDCs with the inner diameter of 68 mm are assembled in the bypass duct of a traditional TFE as duct heater.There are two ways of exhaust： separate exhaust（SE） and mixed exhaust（ME）.Section 2 presents the method of calculation we explored;although much of the mathematics looks familiar,the way of applying them in the TFE with PDCs is quite differenet from that of applying them in the traditional TFE;in particular,eq.（12） is the new result of our exploration.The calculated results,presented in Figs.5 and 6,and their analysis indicate preliminarily that：（1） at the design point,compared with SE TFE,the specific thrust（Fs） of SE TFE with PDCs in BD（PS model） improves by 127.6%;（2） the Fs of ME TFE with PDCs in BD（PM model） improves by 74.6%;（3） the specific fuel consumption（sfc） is smaller than that of traditional TFE with afterburner;（4） at a certain flight altitude,the Fs of TFEs with PDCs in BD increases and their sfc decreases with increasing flight Mach number;（5） at the constant flight Mach number,with increasing flight altitude,the Fs of PS model decreases and its sfc increases;（6） the Fs of PM model increases tardily and its sfc decreases tardily;（7） the PS model displays obvious performance gain both at lower flight Mach number and at lower flight altitude;（8） the PM model can work in wider range of flight Mach number and altitude;it has potential and steady performance.