Page 16 - 《爆炸与冲击》2023年第2期

第 43 卷 杨 帆，等： 煤油液滴直径对两相旋转爆轰发动机流场的影响 第 2 期

3 结 论

采用单步总包反应机理，考虑液滴的雾化破碎、碰撞黏合过程，采用初始均匀直径假设，在直径

1～70 µm 工况范围内计算了二维 RDE 的气液两相流流场，得出以下主要结论。
(1) 不同初始液滴直径工况下，旋转爆轰燃烧室内均形成了稳定传播的爆轰波，由于波前液滴与煤
油蒸气分布不均匀，爆轰波呈现曲面分布。仅当初始直径减小至 1 µm 时，爆轰波才变得更平整，呈现出
气相爆轰特性。
(2) 初始液滴越小，越具有保持稳定的趋势，在爆轰波周期内受高温空气作用，此时主要经历蒸发过
程。而初始液滴越大，越易破碎成小液滴，此时受空气破碎影响较大。
(3) 对于相同的燃料质量流量，在不同初始液滴直径工况下，爆轰波前燃料的蒸发效率越高，爆轰波
速度越大。初始直径为 10～70 µm 工况下，随着初始液滴直径的增大，爆轰波速度先升高后降低，爆轰
波速度极大值出现在初始液滴直径为 20 µm 的工况。

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