Numerical prediction of airfoil characteristics in a transonic droplet-laden air flow

Yeom, Geum-Su; Chang, Keun Sick; Baek, Seung Wook

doi:10.1016/j.ijheatmasstransfer.2011.09.045

Cited by 9 publications

(5 citation statements)

References 47 publications

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“…This is in line with a previous extensive review work published by Pilch and Erdman [19] who identified five different breakdown sequences. Regarding numerical methods aiming to understand the physics of droplet deformation and breakup, it is relevant to reference, for instance, the studies published by Tan [20], Chen [21], Fakhari and Rahimian [22] and Yeom et al [23].…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization of water droplet deformation and breakup in the vicinity of a moving airfoil

García-Magariño

Sor

Velázquez

2015

Aerospace Science and Technology

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Section: Introductionmentioning

confidence: 99%

Experimental characterization of water droplet deformation and breakup in the vicinity of a moving airfoil

García-Magariño

Sor

Velázquez

2015

Aerospace Science and Technology

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“…In this work, the second-order accurate implicit trapezoidal discretization is adopted to solve equations (7) and (8). The final iterative formulas are given as follows…”

Section: Discrete Phasementioning

confidence: 99%

“…where M ex is the momentum change of a particle as it passed through each control volume and is subtracted from the right-handed source terms of the air momentum equation to account for the effect of raindrop on air. The effect of airflow on the raindrop trajectory is naturally incorporated through the air velocity u in equation (7). _ m p is the particle mass flow rate per unit volume.…”

Section: Interphase Couplingmentioning

confidence: 99%

“…Herein, two factors, that is, heavy rain and icing, have attracted particular attention due to their undetermined detrimental effects on aircraft aerodynamic performance. [1][2][3] Although there have been many research achievements on the effects of icing [4][5][6] and heavy rain [7][8][9] on aircraft aerodynamic characteristics, none is found to consider the coupling effects of the two. However, a situation that an aircraft with an initial leading-edge ice accretion is flying through a cumulonimbus cloud or rain condition actually exists, especially in the Northeastern America where the weather is always cold and sometimes with rainfall in winter.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of airfoil aerodynamic performance under the coupling effects of heavy rain and ice accretion

Cao

2016

Advances in Mechanical Engineering

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It has been widely investigated before that both heavy rain and icing conditions can cause severe aerodynamic performance penalties to aircraft in flight; however, aircraft aerodynamics in the presence of both heavy rain and ice accretion has been little explored so far. In this article, a numerical simulation is performed to study the aerodynamic performance of an iced NACA 0012 airfoil in simulated heavy rain condition. A two-way momentum-coupled Eulerian-Lagrangian two-phase flow approach is developed to simulate raindrop trajectories in the airflow field. The analysis indicates that both rain and ice can separately cause severe aerodynamic performance degradation to the airfoil at most angles of attack of interest. In the presence of both ice and rain, a further severe aerodynamic penalty can be produced by rain based on the ice-induced aerodynamic performance degradation. Premature boundary-layer separation and boundarylayer momentum losses by splashed-back raindrops are also observed.

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“…The CFD approach eliminates costly experimental construction and operation at different scales and provides very detailed information that may be used for optimum design, operation, and scale‐up of the wind turbines. In the literature, there are several multiphase CFD models for gas‐particle flow systems including: Anderson and Jackson, Sinclair and Jackson, Gidaspow, and Arastoopour et al In addition, numerical codes developed based on these models have been used to simulate large‐ and small‐scale gas‐particle flow processes (Benyahia et al, Arastoopour, and Abbasi et al).…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of the effect of rain on the performance of horizontal wind turbines

Arastoopour

Cohan

2017

AIChE Journal

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Wind turbine power output is influenced by environmental conditions, including rain. Therefore, a better understanding of the effect of rain on the performance of wind turbines is necessary. Our coupled Lagrangian-Eulerian multiphase computational fluid dynamics model was modified to more accurately simulate the momentum transfer during water film formation on the airfoils of a horizontal-axis turbine and the performance loss caused by the rainwater film on the National Renewable Energy Laboratory (NREL) turbine performance. To obtain three-dimensional numerical simulation of the wind turbine in manageable computational time, simplifying assumptions were made and the validity of these assumptions was verified by simulating the flow over the S809 airfoil of the NREL turbine. In a dry environment, simulation of turbine power output agreed well with NREL experimental data. Our multiphase model showed that the rain film accumulation and flow on the surface of the turbine airfoil reduces the power output of the turbine. Figure 7. Time-averaged lift and drag coefficients for two rainfall rates of 40 and 400 mm/h at 08 to 208 angles of attack.

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Numerical prediction of airfoil characteristics in a transonic droplet-laden air flow

Cited by 9 publications

References 47 publications

Experimental characterization of water droplet deformation and breakup in the vicinity of a moving airfoil

Experimental characterization of water droplet deformation and breakup in the vicinity of a moving airfoil

Numerical simulation of airfoil aerodynamic performance under the coupling effects of heavy rain and ice accretion

CFD simulation of the effect of rain on the performance of horizontal wind turbines

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