Shock-induced energy conversion of entropy in non-ideal fluids
Shock-induced energy conversion of entropy in non-ideal fluids
复制标题
非理想流体中冲击引起的熵能量转换
DOI:
10.1017/jfm.2019.25
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发表时间:
2019
影响因子:
3.7
通讯作者:
Touber E
中科院分区:
文献类型:
--
作者:
Touber E
From shaping cosmic structures in space to producing intense sounds in aircraft engines, shock waves in fluids ineluctably convert entropy fluctuations into swirling motions and sound waves. Studies of the corresponding conversion from internal energy to kinetic energy have so far been restricted to ideal (or idealised) fluids. Yet, many substances do not obey the ideal-gas law (including those in the above two examples). The present work demonstrates that non-ideal thermodynamic properties provide a remarkable degree of control over the conversion to solenoidal and dilatational kinetic energies. Of particular interest is the ability to suppress much of the emitted acoustic field whilst promoting mixing downstream of the shock. This is made possible by exploiting the convexity (or lack thereof) of the shock adiabats. Whilst illustrated here using dense vapours near the thermodynamic critical point, this ability to design and control specific shock-induced energy transfers extends beyond near-critical-point phenomena; e.g. shocked mixtures (high-speed dusty flows on Mars, nanoparticle formation in supersonic expanders for drug manufacturing), reacting fronts (supersonic combustion, rocket propulsion), ionising shocks (reentry systems, inertial confinement fusion) or fronts in active fluids (bacterial and crowd flows). This theoretical work, which demonstrates the predictive capabilities of linear theory, lays the foundation for future experimental investigations ultimately aimed at delivering novel shock-based flow-control strategies exploiting the thermodynamic properties of the fluid.
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影响因子:
3.7
作者:
P. Cinnella;P. Congedo
通讯作者:
P. Congedo
影响因子:
3.7
作者:
A. Kluwick
通讯作者:
A. Kluwick
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
A. Spinelli;A. Guardone;F. Cozzi;M. Carmine;R. Cheli;M. Zocca;P. Gaetani;V. Dossena
通讯作者:
V. Dossena
影响因子:
3.7
作者:
M. Cramer;A. Kluwick
通讯作者:
A. Kluwick
DOI:
--
发表时间:
1958
期刊:
影响因子:
--
作者:
W. Hayes
通讯作者:
W. Hayes