论文标题
在真实气体条件下的冲击膜相互作用中的累积能量效应
Cumulative energy effect in the shock-discontinuity interaction under real-gas conditions
论文作者
论文摘要
研究了一种用于改善点火时间的最近提出的技术，以实现真实的效果。通过重新考虑Rh-Ryations和Shock折射方程，对描述累积能量效应的模型进行了纠正。在热平衡状态下的非分离气体，以激发的平移，旋转，振动和电子自由度为基础。与理想气体相比，当在t = 3000 K处应用于t = 3000 K的N2气体，密度升高11％，温度增加17％，压力跳跃降低。派生的关系主要建立在实验数据上，从而避免了对所有实际气体效应的仔细考虑以及仍然提供令人满意的精度水平的复杂性。主要的结果是，在实际气体中，相互作用中的效果可能比理想气体中的效果强。这些发现可能是为高超音速系统，爆炸，空间和手工艺设计，冲击火焰相互作用，天体物理学和融合研究的高效燃烧器设计而引起的。
A recently proposed technique for improving ignition timing is investigated for real-gas effects. A correction to the model describing the cumulative energy effect in the presence of the shock-discontinuity interaction was done by re-considering the RH-relations and the shock refraction equations. Non-dissociating gas in thermal equilibrium state, with excited translational, rotational, vibrational, and electronic degrees of freedom is considered. When applied to N2 gas at T=3000 K, 11% density increase and 17% temperature and 7% pressure jump decrease were found, compared to that in ideal gas. The derived relations are largely built on experimental data thus avoiding the complexity of careful accounting for all real gas effects and still offering satisfactory precision levels. The main result is that in real gases the effect in the interaction can be stronger than that in an ideal gas. The findings can be of interest in design of efficient combustors for hypersonic systems, detonation, space and craft design, shock-flame interaction, in astrophysics, and fusion research.
