Density Variation due to Reflected Shock‐Boundary‐Layer Interaction
Density Variation due to Reflected Shock‐Boundary‐Layer Interaction
复制标题
反射激波-边界-层相互作用引起的密度变化
DOI：
--
复制
发表时间：
1966
期刊：
影响因子：
--
通讯作者：
H. B. Dyner
中科院分区：
文献类型：
--
作者：
H. B. Dyner
反射激波与入射激波边界层的相互作用已经用条带-薄膜纹影干涉测量法进行了研究。观察到边界层分离效应在反射激波通过后50 μsec内消失;因此，后期密度行为仅由反射激波前的流动特性和气体的化学性质决定。只有当反射激波后面发生吸热反应时，才能观察到后壁附近的反射激波减速，随后由于边界层分离和激波分叉强度的增加而加速。在边界层分离效应消失之后，在反射激波之前的边界层中出现转捩效应之前，反射激波密度按照[Δρ/ρ5（0）] = ktN（0.4 ≤ N ≤ 0.9）变化。相对分叉足速度随马赫数的增加和比热比的减小而增加。机械…
The interaction of the reflected shock with the incident shock boundary layer has been investigated using strip‐film schlieren interferometry. The effect of boundary‐layer separation was observed to disappear within 50 μsec after passage of the reflected shock; thus the late density behavior is governed solely by the flow properties ahead of the reflected shock and by the chemical properties of the gas. Marked reflected shock decelerations near the back wall were observed only when endothermic reactions occurred behind the reflected shock, with subsequent acceleration due to the increasing strength of boundary‐layer separation and shock bifurcation. Reflected shock density varied according to [Δρ/ρ5(0)] = ktN (0.4 ≤ N ≤ 0.9), after boundary‐layer‐separation effects had disappeared and before the effect of transition occurring in the boundary layer ahead of the reflected shock was felt. Relative bifurcated foot velocities increased with increasing Mach number and decreasing specific heat ratio. The mechani...