Development of a Numerical Procedure to Predict the Flowfield with Sand Erosion.

秀行, 田中; 修, 北村; 誠, 山本

doi:10.1299/kikaib.63.3287

Cited by 3 publications

(3 citation statements)

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“…Moreover, since mean velocity distributions govern erosion, the purpose of this validation is to confirm the reproductivities of the mean velocity profiles. A previous study (9) reported that erosion quantities are not affected, even if the prediction accuracy of It is important to verify that the reproducibility of secondary flow in curved tubes since the reproducibility with KEM is low. Secondary velocity profiles at the 0.25H section and at the 0.50H section of station 45 and station D 1 , respectively, are exhibited in Fig.…”

Section: Computational Conditionsmentioning

confidence: 98%

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Numerical Simulation of Sand Erosion in a Square-Section 90-Degree Bend

Suzuki

Yamamoto

2008

JFST

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Sand erosion is a phenomenon whereby solid particles impinging on a wall cause serious mechanical damage to the wall surface. The performance and lifetime of various machines, such as airplanes, ships, gas turbines, and pumps, are severely degraded by sand erosion. This phenomenon is a typical gas-particle two-phase turbulent flow and can be considered as a multi-physics problem in which the flow field, particle trajectory, and wall deformation interact. However, neither the change of the flow field nor the related particle trajectory during the erosion process has been taken into account in conventional simulations. This treatment is physically unrealistic. Hence, we have developed a numerical procedure by which to investigate the sand erosion phenomenon, including the temporal change of the flow field and the wall shape. In the present study, we simulate sand erosion of a 90-degree bend with a square cross-section. Bend erosion is the typical subject of sand erosion experiments and is useful for the verification of numerical simulations. The numerical results are compared with experimental data and it is confirmed that the developed code can capture the sand erosion phenomenon reasonably.

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Section: Computational Conditionsmentioning

confidence: 98%

“…The fluid velocity u f is the time-averaged velocity obtained by RANS. In a previous study (9) , we carried out two-dimensional computations considering the effect of the fluctuating velocity and found that the turbulence did not affect the results of the computations. The same tendency is confirmed in the present study.…”

Section: Particle-phasementioning

confidence: 99%

Numerical Simulation of Sand Erosion in a Square-Section 90-Degree Bend

Suzuki

Yamamoto

2008

JFST

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“…This algorithm comes from the one developed by Suzuki et al to predict sand erosion phenomenon. 5,6) To verify the validity of the model, naphthalene sublimation experiments were conducted.…”

Section: Introductionmentioning

confidence: 99%

Development of Wall Regression Model of Hybrid Rocket Solid Fuel

Nawata

Sasaki

Saito

et al. 2016

AEROSPACE TECHNOLOGY JAPAN

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The purpose of this study is to develop a computational method to predict fuel regressions for hybrid rocket solid fuels. The shape of the flow field changes depending on the regression and vaporization of the solid fuel. This shape change and the heat flux from the combustion gas to the fuel are mutually dependent. Therefore a computational method that can accurately predicts both of the fuel regression and the heat flux is necessary to clarify the mutual dependence of them. In this study, we have developed a computational method to predict the regression phenomenon including the effect of the shape change of the flow field. The developed code predicts the regression phenomena by repeating gas-phase calculations and regression-phase calculations. The wall consisting of grids permits the flow field to be an arbitrary shape. As the first step, the complex chemical reaction was not included and numerical results were compared with a sublimation phenomenon of naphthalene in a non-combustion flow. Numerical results successfully predicted Nusselt number change due to regression qualitatively.

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Numerical Simulation of Sand Erosion Phenomena in a Single-Stage Axial Compressor

Suzuki

Yamamoto

2011

JFST

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Sand erosion is a phenomenon whereby solid particles impinging on a wall cause serious mechanical damage to the wall surface. This phenomenon is a typical gas-solid two-phase turbulent flow and can be considered as a multi-physics problem in which the flow field, particle trajectory, and wall deformation interact. On the other hand, aircraft engines operating in a particulate environment are subjected to performance and lifetime deterioration due to sand erosion. In particular, the compressors of aircraft engines can be severely damaged. In order to consider sand erosion in the design phase, it is important to develop a prediction method and to obtain basic data. In the present study, we apply our three-dimensional sand erosion prediction code to a single-stage axial flow compressor. The numerical results for the eroded surface geometry and the performance deterioration showed the same tendency as the experimental results. Moreover, the change in the flow field and the particle trajectories are investigated in order to clarify the erosion mechanisms of the compressor.

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Development of a Numerical Procedure to Predict the Flowfield with Sand Erosion.

Cited by 3 publications

References 0 publications

Numerical Simulation of Sand Erosion in a Square-Section 90-Degree Bend

Numerical Simulation of Sand Erosion in a Square-Section 90-Degree Bend

Development of Wall Regression Model of Hybrid Rocket Solid Fuel

Numerical Simulation of Sand Erosion Phenomena in a Single-Stage Axial Compressor

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