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首页> 外文期刊>Acta astronautica >Equivalence ratio and constriction effects on RBCC thrust augmentation
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Equivalence ratio and constriction effects on RBCC thrust augmentation

机译：当量比及收缩对RBCC推力增大的影响

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摘要

A theoretical analysis of a variable area rocket based combined cycle engine with and without simultaneous mixing and combustion is presented. The flowfield is solved using a steady, quasi-one-dimensional, inviscid control volume formulation with combustion effects included via a generalized equilibrium calculation. Compression augmentation is shown to be sensitive to the equivalence ratio within the primary rocket chamber, where ejector section performance is greatest at both low and high equivalence ratios but near a minimum at stoichiometric conditions. The thrust generated by the RBCC engine compared to that generated by the same rocket in isolation can be increased by as much as 12％ at constriction ratios of between 45％ and 50％. Thrust augmentation is also shown to vary with equivalence ratio, where for a fixed geometry the maximum thrust is generated at equivalence ratios slightly below unity.
机译：提出了具有和不具有同时混合和燃烧的基于变面积火箭的联合循环发动机的理论分析。使用稳定的准一维无粘性控制体积公式求解流场，并通过广义平衡计算包括燃烧效应。压缩增强被显示为对主火箭室内的当量比敏感，在主当量腔中，当低和高当量比时，喷射器截面性能最大，但在化学计量条件下接近最小。 RBCC发动机产生的推力与同一个火箭单独产生的推力相比，在45％到50％的压缩比下可以增加12％。推力增加也显示为随当量比而变化，对于固定的几何形状，最大推力是在当量比略小于1的情况下产生的。

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