Jet Formation of SF6 Bubble Induced by Incident and Reflected Shock Waves

Zhu, Yuejin; Yu, Lei; Pan, Jianfeng

doi:10.1007/978-3-319-91020-8_67

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2021

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“…Later, these cases were numerically modelled highlighting the feature of the shock-bubble interactions [31]. Since then, many additional cases have been considered, including the bubble composition of SF6 and Krypton [33][34][35][36]. However, these studies are all conducted at atmospheric pressure and room temperature where the fluids are in a gaseous state.…”

Section: Introductionmentioning

confidence: 99%

Shock wave interaction with a transcritical fuel droplet

Boyd

Jarrahbashi

2021

ICLASS

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Shock-droplet interactions occur in a spectrum of high-speed propulsion systems involving liquid fuels. When the combustion chamber pressure is above the critical pressure of the fuel, transcritical behaviour involving the transition from liquid-like to gas-like states is observed. Our understanding of multiphase-shock interaction is significantly less developed than its gasphase counterpart (i.e., shock-bubble interaction) and is particularly limited at transcritical conditions. We consider the interaction of a shockwave with a liquid n-dodecane droplet exposed to a nitrogen environment at a supercritical pressure. A fully-conservative diffuseinterface framework coupled with the Peng-Robinson equation of state is developed to accurately determine the state of the fluid as the shock propagates through the droplet. The shock-droplet interaction results show the development of interfacial instabilities and an axial jet.

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