Thermochemical effects on hypersonic shock waves interacting with weak turbulence

Huete, César; Cuadra, A.; Vera, Marcos; Urzay, Javier

doi:10.1063/5.0059948

Cited by 9 publications

(2 citation statements)

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“…2 in Ref. 99 ). Further examples closer to HEDP, which may include radiative shocks, also exhibit turning points in the RH curve, as computed in Ref.…”

Section: Rankine-hugoniot Equationsmentioning

confidence: 91%

The stability of expanding reactive shocks in a van der Waals fluid

2022

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Despite the extensive literature accumulated since the pioneering works of D'yakov and Kontorovich in the 1950s, the stability of steady shocks is still an open question when realistic boundary conditions are accounted. The consideration of a supporting mechanism, which is indeed a necessary condition for shock steadiness, modifies the perturbation shock dynamics in the unstable range. The Noh problem is a suitable example to form steady expanding shocks. This configuration is of great interest to the high-energy-density-physics community because of its direct application to inertial confinement fusion and astrophysics, for which the stagnation of a supersonically converging material via an accretion shock front is ubiquitous. In this work, we extend the generalized Noh problem, both base-flow solution and linear stability analysis, to conditions where endothermic or exothermic transformations undergo across the shock. Within the spontaneous acoustic emission conditions found for a van der Waals gas [J. W. Bates and D. C. Montgomery, “The D'yakov-Kontorovich instability of shock waves in real gases,” Phys. Rev. Lett. 84, 1180 (2000)], we find that cylindrical and spherical expanding shocks become literally unstable for sufficiently high mode numbers. Counterintuitively, the effect of exothermicity or endothermicity across the shock is found to be stabilizing or destabilizing, respectively.

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“…2 in Ref. 99 ). Further examples closer to HEDP, which may include radiative shocks, also exhibit turning points in the RH curve, as computed in Ref.…”

Section: Rankine-hugoniot Equationsmentioning

confidence: 91%

The stability of expanding reactive shocks in a van der Waals fluid

2022

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“…The mechanical effect is the ultrasonic effect on the medium when the power of mechanical vibration of the mass. The chemical effect is that the local environment of high temperature and high pressure generated by the ultrasound causes the formation of free radicals by breaking molecular bonds in aqueous solution [9] , [10] , [11] , [12] , [13] , [14] . The application of ultrasound in hydrogen production by proton exchange membrane electrolysis of water (PEM) and the study of the kinetic behaviour of the ultrasonic effect on the evolution of hydrogen bubbles at different stages of the hydrogen production process are important to improve the efficiency of hydrogen production by PEM and to promote the application of hydrogen production by PEM.…”

Section: Introductionmentioning

confidence: 99%