Experimental Investigations on the Deformation and Breakup of Hundred-Micron Droplet Driven by Shock Wave

Zhang, Yixin; Dong, Rongxiao; H, Shi; Liu, Jinhong

doi:10.3390/app13095555

Cited by 1 publication

(6 citation statements)

References 19 publications

(24 reference statements)

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Section: Experimental Parametersmentioning

confidence: 99%

“…Our research employed the experimental method developed by Zhang [16], which integrated dual-pulse laser holographic testing technology with a shock tube device. Comprehensive details regarding the experimental procedures and principles can be found in reference [16]. To quantitatively study the instability development of the initial submillimeter droplet's diameter and Weber number on the shock wave-droplet interface, the sub-millimeter droplet size in the experiment was 0.42 mm.…”

Section: Experimental Parametersmentioning

confidence: 99%

“…To quantitatively study the instability development of the initial submillimeter droplet's diameter and Weber number on the shock wave-droplet interface, the sub-millimeter droplet size in the experiment was 0.42 mm. This comparative analysis utilized experimental data from Shi [15] (sub-millimeter) and Zhang [16] (0.24 mm). In addition, this experiment also investigated the evolution of sub-millimeter liquid droplet deformation and fragmentation under shock wave conditions with a Ma value of 2.12, where the airflow environment post-shock wave achieved supersonic velocities.…”

Section: Experimental Parametersmentioning

confidence: 99%

“…They devised a spatiotemporal evolution model based on high-speed schlieren imaging for various modes of sub-millimeter liquid droplet fragmentation. More recently, Zhang et al [16] employed a combination of dual-pulse laser holography and an experimental apparatus with shock wave-driven droplets, and they acquired high-resolution experimental image data at the micron-nanosecond level.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, there is an absence of quantitative analysis concerning instability development at the sub-millimeter droplet-shock wave interface, as well as a dearth of accurate three-dimensional numerical simulations regarding the evolution of sub-millimeter droplets when the airflow environment is in a supersonic state after a shock wave interaction. Therefore, this study first conducted experiments on the aerodynamic fragmentation of sub-millimeter liquid droplets with an initial diameter of 0.42 mm under various shock wave impacts, based on the experimental designed by Zhang [16]. Quantitatively, we investigated the impact of sub-millimeter droplet initial diameter and Weber number on the development of the R-T and K-H instabilities following the extraction of spatiotemporal parameters for the fragmentation evolution of liquid droplets.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Interface Instability of a Shock Wave–Sub-Millimeter Liquid Droplet Interface and a Numerical Investigation of Its Breakup

Wei,

Dong,

Zhang

et al. 2023

Applied Sciences

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This study investigated the influence of instability on the interaction between sub-millimeter liquid droplets and shock waves. Experiments were conducted using 0.42 mm diameter droplets with varying shock wave Mach numbers. The investigation quantified the effects of Weber numbers and initial diameters on the development of Rayleigh–Taylor and Kelvin–Helmholtz instabilities at the shock wave–sub-millimeter liquid droplet interface. Three-dimensional numerical simulations were performed to investigate the deformation and breakup behaviors of sub-millimeter liquid droplets under the impact of a shock wave with a Mach number of 2.12. The post-shock gas flow environment in this condition was in a supersonic state. The simulations utilized the volume-of-fluid method to model the gas–liquid interface, employed unsteady Reynolds-averaged Navier–Stokes methods to simulate turbulence, and incorporated grid gradient adaptive technology to enhance computational efficiency. The results revealed that by increasing the Weber number or decreasing the initial diameter, both the growth rate and the wavenumber extremum of the Rayleigh–Taylor and Kelvin–Helmholtz instability waves increased. The variation in the K–H instability’s growth rate extremum increasing Weber number surpassed that of the R–T’s instability. This indicated that both the R–T and K–H waves on sub-millimeter liquid droplets tended to exhibit increased growth rates and reduced scales. Moreover, as the Weber number increased, the K–H instability became dominant in the aerodynamic fragmentation. The numerical simulations showed good qualitative agreement with the experimental data, affirming the viability of numerical methods for addressing such challenges. The evolution of the sub-millimeter liquid droplets was marked by two primary stages, flattening and shear stripping, signifying that the K–H instability-driven SIE mechanism governed the aerodynamic breakup in the supersonic post-shock airflow.

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Section: Experimental Parametersmentioning

confidence: 99%

Section: Experimental Parametersmentioning

confidence: 99%

Section: Experimental Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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