Surface Coating Effect on Protection of Icing for Axial Fan Blade

Murooka, Takeshi; Shishido, Shinichirou; Hiramoto, Riho; Minoya, Takakazu

doi:10.4271/2011-38-0009

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…The computational target is a commercial axial blower (Showa Denki Co. Ltd., Kairyu series A2D6H-411) because there is no experimental data of the ice shedding in a jet engine. This axial fan was used in the experimental study (Murooka et al [13], see Fig. 5).…”

Section: Computational Target and Gridsmentioning

confidence: 99%

“…In the present study, we develop a new icing model that can consistently reproduce the flow field around the computational target, super-cooled droplets impinging on the walls, ice growth, and ice shedding. The proposed icing model, which includes ice shedding, is validated though comparison with experimental data for flow rate change due to ice growth and ice shedding, as measured by Murooka et al [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Hayashi

Yamamoto

2014

Volume 1A: Aircraft Engine; Fans and Blowers

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In the jet engine, icing phenomena occur primarily on the fan blades, the fan exit guide vanes (FEGVs), the splitter, and the low-pressure compressor. Accreted ice disturbs the inlet flow and causes large energy losses. In addition, ice accreted on a fan rotor can be shed from the blade surface due to centrifugal force and can damage compressor components. This phenomenon, which is typical in turbomachinery, is referred to as ice shedding. Although existing icing models can simulate ice growth, these models do not have the capability to reproduce ice shedding. In the present study, we develop an icing model that takes into account both ice growth and ice shedding. Furthermore, we validated the proposed ice shedding model through the comparison of numerical results and experimental data, which includes the flow rate loss due to ice growth and the flow rate recovery due to ice shedding. The simulation results for the time at which ice shedding occurred and that were obtained using the proposed ice shedding model were in good agreement with the experimental results.

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Section: Computational Target and Gridsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Hayashi

Yamamoto

2014

Volume 1A: Aircraft Engine; Fans and Blowers

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show abstract

“…The proposed icing model, which includes ice shedding, is validated though comparison with experimental data for flow rate change due to ice growth and ice shedding, as measured by Murooka et al [13].…”

Section: Numerical Simulation On Ice Shedding Phenomena In Turbomachimentioning

confidence: 99%

“…The centrifugal force and the adhesion force acting on accreted ice are expressed, respectively, as: In Eq. (12), the adhesion stress is obtained from an ice adhesion test conducted by Murooka et al [13] The wall material is aluminum. By use of Eqs.…”

Section: Ice Shedding Judgmentmentioning

confidence: 99%

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Hayashi¹,

Yamamoto²

2015

JEPE

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Abstract:In the jet engine, icing phenomena occur primarily on the fan blades, the FEGVs (fan exit guide vanes), the splitter, and the low-pressure compressor. Accreted ice disturbs the inlet flow and causes large energy losses. In addition, ice accreted on a fan rotor can be shed from the blade surface due to centrifugal force and can damage compressor components. This phenomenon, which is typical in turbomachinery, is referred to as ice shedding. Although existing icing models can simulate ice growth, these models do not have the capability to reproduce ice shedding. In the present study, we develop an icing model that takes into account both ice growth and ice shedding. Furthermore, we have validated the proposed ice shedding model through the comparison of numerical results and experimental data, which include the flow rate loss due to ice growth and the flow rate recovery due to ice shedding. The simulation results for the time at which ice shedding occurred and what were obtained using the proposed ice shedding model were in good agreement with the experimental results.

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“…Table 2 summarizes the numerical conditions. The rotational speed and mass flow rate of air were set according to a previous experiment [46]. The other parameters were determined by referring to an environment with ice crystal icing [33].…”

Section: Target and Flow Conditionsmentioning

confidence: 99%

Three-Dimensional Trajectory and Impingement Simulation of Ice Crystals Considering State Changes on the Rotor Blade of an Axial Fan

Hirose,

Fukudome,

Mamori

et al. 2023

Aerospace

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Ice crystal icing occurs in jet engine compressors, which can severely degrade jet engine performance. In this study, we developed an ice crystal trajectory simulation, considering the state changes of ice crystals with a forced convection model, indicating a significant difference in impinging ice crystal content on the blade for tiny ice crystals. Then, ice crystal trajectory simulations were performed for the rotor blade of an axial fan to investigate the effects of ice crystal size and relative humidity on collision characteristics. The results indicate that the surrounding air affects the composition of tiny ice crystals before collision, and the flight time until impingement on the rotor blade varies significantly depending on the span position. Among them, ice crystals with a diameter of 50 μm impinge with water content that is most likely to adhere to the blade. Three-dimensional simulation results show that many ice crystals impinge not only on the leading edge, where icing occurs as revealed by the two-dimensional simulations but also on the trailing edge of the hub side. This study emphasizes the importance of evaluating the three-dimensional impingement position and water content in the prediction of ice crystal icing.

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Surface Coating Effect on Protection of Icing for Axial Fan Blade

Cited by 10 publications

References 2 publications

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Numerical Simulation on Ice Shedding Phenomena in Turbomachinery

Three-Dimensional Trajectory and Impingement Simulation of Ice Crystals Considering State Changes on the Rotor Blade of an Axial Fan

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