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为了确定进气涡流和二次气体喷射能否有效地用于固体燃料冲压发动机燃料燃速的控制和推力调节,曾进行了一项实验研究.进气涡流的特性是在无反应流中测量的.试验是用当量比为0.5～1.8之间的三种燃料成分在高、低空气质量流量下进行的.发现,在进气道下游引入涡流对实现燃料燃速的有限增长会产生影响,但影响的幅度与发动机的几何尺寸有很大关系.涡流与再附着进气道气流和大大增强的近壁混合之间的相互作用对有效燃烧不利.高能气体燃料(H_2,C_2H_4)可以很容易地喷入,并在贫油条件下有效地燃烧,大大提高推力.
An experimental study was conducted to determine if intake and secondary gas injection can effectively be used to control the fuel injection rate and thrust regulation of a solid fuel ramjet engine.The characteristics of the intake vortex are measured in non-reactive flow The test was conducted at high and low mass air mass rates using three fuel compositions with equivalence ratios of 0.5 to 1.8 and found that introducing eddy currents downstream of the intake passage had the effect of achieving a limited increase in fuel burn rate but The magnitude of the influence is strongly related to the engine geometry, and the interaction between eddy currents and reattached intake airflow and greatly enhanced near-wall mixing is detrimental to efficient combustion. High-energy gaseous fuels (H 2, C 2 H 4) Sprayed and burned efficiently in lean conditions greatly increases thrust.