Water Impingement Prediction on Multi-Element Airfoils by Means of Eulerian and Lagrangian Approach with Viscous and Inviscid Air Flow

Iuliano, Emiliano; Brandi, Vincenzo; Mingione, Giuseppe; Nicola, C. de; Tognaccini, Renato

doi:10.2514/6.2006-1270

Cited by 31 publications

(21 citation statements)

References 6 publications

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“…The collection efficiency is the ratio of the maximum mass of collected droplets and the actual mass of collected droplets 12 . And it can be defined in general as…”

Section: Droplet Trajectory Computationmentioning

confidence: 99%

3d Ice Accretion Simulation for Complex Configuration Basing on Improved Messinger Model

Zhu

Sun

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

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Ice accretion on 3D complex configuration is studied by numerical method. The flow field is obtained by using Fluent 6.0 with S-A turbulence model, droplet trajectories and impingement characteristics are obtained using the Eulerian approach, ice shape is calculated basing on the improved Messinger model with a new runback distribution scheme. Using the method presented in this paper, ice accretion on NACA0012 is computed, and the results are in good agreement with the available experiment data. It shows preliminarily that the improved method described in this paper is feasible. Meanwhile, ice accretion on a four-element airplane is studied. According to the analysis of the calculated result, it illustrates that using the method presented in the paper can correctly simulate the ice accretion on 3D complex configuration.

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“…The collection efficiency is the ratio of the maximum mass of collected droplets and the actual mass of collected droplets 12 . And it can be defined in general as…”

Section: Droplet Trajectory Computationmentioning

confidence: 99%

3d Ice Accretion Simulation for Complex Configuration Basing on Improved Messinger Model

Zhu

Sun

et al. 2012

Int. J. Mod. Phys. Conf. Ser.

View full text Add to dashboard Cite

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“…Though Eulerian methods have proven successful on bodyconforming meshes [12,17], it will be shown that satisfactory results can be obtained by using immersed boundary methods too. Validation results will be shown in some test conditions on two basic test cases: a symmetric airfoil and a horizontal swept tail.…”

Section: Introductionmentioning

confidence: 98%

“…In general, the solution of a gas-particle flow consists of solving a coupled partial differential equation system for the suspension phase and the carrier phase [6,7]. However, when dealing with aircraft icing conditions, some simplifying hypotheses [12] can be applied to reduce the complexity of the computational solution. In particular, the following assumptions are considered:…”

Section: Introductionmentioning

confidence: 99%

“…The Eulerian approach allows treating the cloud, through which the airplane is traveling, as a continuous medium that is described through specific governing equations derived from general laws through subsequent assumptions and approximations. Hence, a partial differential equation (PDE) system is derived to describe the evolution of water droplet phase mass and momentum with exchange terms coming from the aerodynamic solution [12]. The approach is very powerful as, at any point of the computational domain, it is possible to know in detail the characteristic quantities of the cloud field (water content, velocity, temperature), without tracing particle trajectories and individuating the ones that actually hit the body.…”

Section: Introductionmentioning

confidence: 99%

“…The impingement Cartesian data have been compared with the body-conforming ones obtained in Ref. [12]. In particular a mean volumetric droplet diameter (MVD) of 20 lm was considered.…”

Section: Introductionmentioning

confidence: 99%

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A Eulerian Method for Water Droplet Impingement by Means of an Immersed Boundary Technique

Capizzano

Iuliano

2014

Journal of Fluids Engineering

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The estimation of water droplet impingement is the first step toward a complete ice accretion assessment. Numerical approaches are usually implied to support the experimental testing and to provide fast responses when designing ice protection systems. Basically, two different numerical methodologies can be found in literature: Lagrangian and Eulerian. The present paper describes the design and development of a tool based on a Eulerian equation set solved on Cartesian meshes by using an immersed boundary (IB) technique. The tool aims at computing the evolution of a droplet cloud and the impingement characteristics onto the exposed surfaces of an aircraft. The robustness of the methodology and the accuracy of the approach are discussed. The method is applying to classical two-and three-dimensional test cases for which experimental data are available in literature. The results are compared with both experiments and body-fitted numerical solutions.

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Magnetically Responsive Superhydrophobic Surfaces with Droplet Manipulation Capability

2023

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The precise control of tiny droplets has always been a complex problem to be solved. The magnetically responsive superhydrophobic surfaces, which can be controlled for droplet manipulation by an external magnetic field, have attracted attention because of its characteristics such as easy operation, rapid response, remote control, and simple process. Herein, a magnetically responsive superhydrophobic surface is designed and prepared by a two‐step spraying process. The precise control of microdroplets on the prepared surface is carried out, and the droplet control can be quickly achieved through noncontact control in various ways including active, multidirectional, and antigravity. On this basis, the ideal surface model is established to analyze the droplet control mechanism. In addition, the transport effects of different types of droplets, including water droplets and saline, are investigated. The durability evaluation experiment including droplet‐repeated control, friction, tape stripping, and scratch test shows that the surface has certain durability. This magnetically responsive superhydrophobic surfaces can meet requirements of biological experiments and provide a new idea for low‐loss droplet transport and microfluidic chip.

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Water Impingement Prediction on Multi-Element Airfoils by Means of Eulerian and Lagrangian Approach with Viscous and Inviscid Air Flow

Cited by 31 publications

References 6 publications

3d Ice Accretion Simulation for Complex Configuration Basing on Improved Messinger Model

3d Ice Accretion Simulation for Complex Configuration Basing on Improved Messinger Model

A Eulerian Method for Water Droplet Impingement by Means of an Immersed Boundary Technique

Magnetically Responsive Superhydrophobic Surfaces with Droplet Manipulation Capability

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