切向旋流对SRR补燃室内气流掺混影响

Influence of tangential rotational jet on the mixing effect in additional chamber of solid ram rocket

关键词:  冲压火箭发动机  加力燃烧室  混合  旋流角+

Key words:  Ducted rocket engine  Afterburner  Mixing  Rotational flow angle~+

摘要:

采用N S和k ε双方程湍流模型,离散后采用迎风格式进行数值求解,对燃气发生器喷管不同旋流工况下,管道式固体火箭冲压发动机补燃室内燃气与空气掺混进行了数值研究。比较分析了不同旋流角对补燃室中掺混效果的影响。计算表明:在0°～20°计算范围内,随着旋流角度的增加,补燃室中高温燃气和冷空气的掺混更充分。

Abstract:

Using the N-S and k-ε turbulence model and upwind scheme, numerical studies on the mixing effects of burning gas and air in the additional chamber of solid ramjet motor were carried out under different rotational angles. After comparison, the influences of rotational angles on mixing effect were analysized, and numerical results show that the mixing effects increase as rotational angle increases when it is smaller than 20°.