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本文对使用液氢燃料冲压发动机在大马赫数范围内的工作特性进行了比较详细的计算与分析。结果表明使用氢燃料直到马赫数达6.5,亚燃冲压仍具有相当好的比冲特性,而使用碳氢燃料在马赫数达4.5以后比冲特性迅速下降。文章还从加热比和单位空气比冲出发讨论了发动机的调节特性,并建议采用较简单的有级调节来代替复杂的无级连续调节方法。本文还对等截面超燃冲压发动机的特性进行了计算,结果表明等截面极限加热并非最佳设计。
In this paper, the operating characteristics of a liquid hydrogen fuel ramjet engine in a large Mach number range are calculated and analyzed in more detail. The results show that the use of hydrogen fuel until the Mach number 6.5, the sub-fuel stamping still has quite good specific impulse characteristics, and the use of hydrocarbon fuels in the Mach number 4.5 after the rapid decline in the specific impulse characteristics. The article also discusses the adjustment characteristics of the engine from the specific heat ratio and the unit air ratio, and proposes a simpler step-by-step adjustment instead of the complicated stepless continuous adjustment method. In this paper, the characteristics of the sci-fi ramjet engine with equivalent cross-section were also calculated. The results show that the ultimate heating of equal section is not the best design.