Investigation of the Physical Phenomena Associated with Rain Impacts on Supersonic and Hypersonic Flight Vehicles

Moylan, Bruce; Landrum, Brian; Russell, G.

doi:10.1016/j.proeng.2013.05.026

Cited by 36 publications

(3 citation statements)

References 8 publications

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“…This phenomenon has a crucial role in many fluids engineering applications including, just to mention, raindrop fragmentation in the flow field around supersonic aircrafts. Indeed, in the aerospace industry, a proper aerodynamic design can help greatly reduce the erosion caused by the impingement of small liquid fragments at high relative speeds on the aircraft surfaces [4].…”

Section: Introductionmentioning

confidence: 99%

Hybrid VOF–Lagrangian CFD Modeling of Droplet Aerobreakup

Rossano

Stefano

2022

Applied Sciences

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A hybrid VOF–Lagrangian method for simulating the aerodynamic breakup of liquid droplets induced by a traveling shock wave is proposed and tested. The droplet deformation and fragmentation, together with the subsequent mist development, are predicted by using a fully three-dimensional computational fluid dynamics model following the unsteady Reynolds-averaged Navier–Stokes approach. The main characteristics of the aerobreakup process under the shear-induced entrainment regime are effectively reproduced by employing the scale-adaptive simulation method for unsteady turbulent flows. The hybrid two-phase method combines the volume-of-fluid technique for tracking the transient gas–liquid interface on the finite volume grid and the discrete phase model for following the dynamics of the smallest liquid fragments. The proposed computational approach for fluids engineering applications is demonstrated by making a comparison with reference experiments and high-fidelity numerical simulations, achieving acceptably accurate results without being computationally expensive.

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Section: Introductionmentioning

confidence: 99%

Hybrid VOF–Lagrangian CFD Modeling of Droplet Aerobreakup

Rossano

Stefano

2022

Applied Sciences

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“…The secondary atomization of water droplets through aerobreakup induced by traveling shock waves represents a complex two-phase compressible flow problem of crucial importance in a number of fluids engineering applications [1,2]. For example, such a physical phenomenon is encountered in aerospace engineering research, when addressing the problem of raindrop impact erosion for supersonic flight, where the damage caused by the impingement of rain sub-droplets at high relative speeds on exterior aircraft surfaces has to be reduced through proper aerodynamic design [3,4].…”

Section: Introductionmentioning

confidence: 99%

Scale-Resolving Simulation of Shock-Induced Aerobreakup of Water Droplet

Rossano,

De Stefano

2024

Computation

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Two different scale-resolving simulation (SRS) approaches to turbulence modeling and simulation are used to predict the breakup of a spherical water droplet in air, due to the impact of a traveling plane shock wave. The compressible flow governing equations are solved by means of a finite volume-based numerical method, with the volume-of-fluid technique being employed to track the air–water interface on the dynamically adaptive mesh. The three-dimensional analysis is performed in the shear stripping regime, examining the drift, deformation, and breakup of the droplet for a benchmark flow configuration. The comparison of the present SRS results against reference experimental and numerical data, in terms of both droplet morphology and breakup dynamics, provides evidence that the adopted computational methods have significant practical potential, being able to locally reproduce unsteady small-scale flow structures. These computational models offer viable alternatives to higher-fidelity, more costly methods for engineering simulations of complex two-phase turbulent compressible flows.

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“…In the former case, mixing and combustion rates of liquid fuel droplets are greatly improved as a result of the droplet fragmentation induced by detonation waves [3]. In the latter case, erosion caused by the impingement of rain droplets at high relative speeds on aircraft surfaces, is greatly alleviated through proper aerodynamic design [4]. The shock/droplet interaction plays a very important role as it represents the initial stage of the aerobreakup induced by the high-speed gas stream.…”

Section: Introductionmentioning

confidence: 99%

Computational Evaluation of Shock Wave Interaction with a Liquid Droplet

2022

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This article represents the natural continuation of the work by Rossano and De Stefano (2021), dealing with the computational fluid dynamics analysis of a shock wave interaction with a liquid droplet. Differently from our previous work, where a two-dimensional approach was followed, fully three-dimensional computations are performed to predict the aerodynamic breakup of a spherical water body due to the impact of a traveling shock wave. The present engineering analysis focuses on capturing the early stages of the breakup process under the shear-induced entrainment regime. The unsteady Reynolds-averaged Navier–Stokes approach is used to simulate the mean turbulent flow field in a virtual shock tube device with circular cross section. The compressible-flow-governing equations are numerically solved by means of a finite volume method, where the volume of fluid technique is employed to track the air–water interface. The proposed computational modeling approach for industrial gas dynamics applications is verified by making a comparison with reference numerical data and experimental findings, achieving acceptably accurate predictions of deformation and drift of the water body without being computationally cumbersome.

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Investigation of the Physical Phenomena Associated with Rain Impacts on Supersonic and Hypersonic Flight Vehicles

Cited by 36 publications

References 8 publications

Hybrid VOF–Lagrangian CFD Modeling of Droplet Aerobreakup

Hybrid VOF–Lagrangian CFD Modeling of Droplet Aerobreakup

Scale-Resolving Simulation of Shock-Induced Aerobreakup of Water Droplet

Computational Evaluation of Shock Wave Interaction with a Liquid Droplet

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