On the existence and multiplicity of rotating detonations
On the existence and multiplicity of rotating detonations
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DOI：
10.1016/j.proci.2016.06.132
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
A. S. George;R. Driscoll;V. Anand;E. Gutmark
中科院分区：
文献类型：
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作者：
A. S. George;R. Driscoll;V. Anand;E. Gutmark
针对四种燃烧室几何形状的化学计量 H2-O2-N2 混合物，对旋转爆震燃烧室的运行行为进行了实验探索，以确定单元宽度 (λ) 和燃烧室通道宽度 (wch) 对爆震存在和波数的作用。氧化剂的氮气稀释比 (β= N2:O2) 从 β= 3.76（空气）到 β= 2，从而使电池宽度减少两倍。成功爆炸的范围受到最小归一化通道宽度 wch/λ> 0.5 的限制，这与矩形通道中经典爆炸传播的极限一致。燃烧室内的爆震波数量范围为 n= 1–3，并且当爆震前沿的归一化周长超过 p/λ> 7.4 时，爆震波数量会以可预测的方式增加。从目前的工作来看，从燃烧室几何形状和混合物单元宽度预测旋转爆炸的存在和多次性似乎是可行的。
The operating behavior of a rotating detonation combustor is experimentally explored for stoichiometric H2–O2–N2mixtures for four combustor geometries to determine the role of cell width (λ) and combustor channel width (wch) on the existence of detonation and number of waves. The ratio of nitrogen dilution ratio (β= N2:O2) of the oxidizer is varied fromβ= 3.76 (air) toβ= 2, yielding a reduction in the cell width by a factor of two. The regime of successful detonation is bounded by a minimum normalized channel width ofwch/λ> 0.5, which agrees with the limit for classical detonation propagation in a rectangular channel. The number of detonation waves within the combustor ranges fromn= 1–3, and increases in a predictable fashion when the normalized perimeter of a detonation front exceedsp/λ> 7.4. From the present work, it appears feasible to predict the existence and multiplicity of rotating detonations from the combustor geometry and mixture cell width.