• Proceedings of the KSME Conference
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• 2005.11a
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• pp.46.2-46.2
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• 2005

• Proceedings of the Korean Geotechical Society Conference
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• 2006.03a
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• pp.546-551
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• 2006

This study is concerned with the dynamic behaviour of a fluid layer and a submerged deposit of sand in a rigid rectangular container when subjected to horizontal shaking. Detailed analyses are made of the interaction between the fluid pressure field and the excess pore pressure changes in the sand deposit, in terms of finite-element modelling as well as of two-layer fluid theory. It is shown that the predicted performance compares favourably with what has been observed in centrifugal shaking-table testing on submerged sand deposits.

• 한국전산유체공학회:학술대회논문집
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• 1995.10a
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• pp.12-28
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• 1995

CFD techniques are widely used for the design and development of turbomachinery. The design and performance prediction, evaluation of performace and analysis are all important for the successful development of the machinery. The characteristics of the sturcture and performace of the centrifugal compressor are reviewed for the effective application of CFD techniques. The examples of flow calculations through an impeller and a channel diffuser are presented and phenomenological aspects are discussed. The future research topics of CFD area are also suggested.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2004.10a
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• pp.203-206
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• 2004

Tilting train has been developed to increase the operational speed of the trains on conventional lines which have many curves. This train are tilted at curves to compensate for unbalanced carbody centrifugal acceleration to a greater extent than compensation produced by the track cant, so that passengers do not feel centrifugal acceleration and thus trains can run at higher speed at curves. This paper developed PDM(product data managemnet) to make a system engineering of TTX(tilting train express) with maximum operation speed 180 km/h.

• 한국초전도학회:학술대회논문집
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• v.14
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• pp.96-96
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• 2004

• Transactions of the Korean Society of Mechanical Engineers B
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• v.21 no.8
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• pp.1086-1093
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• 1997

Conceptual system design of a multistage centrifugal air-compressor is the first loop of design procedure. The properly designed system is important for compactness, low manufacturing cost, easy controllability, fast extension for the new specification of the compressor. A simple procedure of conceptual system design is proposed in the present study using simple analysis. A few examples of the procedure for a real system are shown and several design aspects are discussed.

• 유체기계공업학회:학술대회논문집
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• 2005.12a
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• pp.655-660
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• 2005

The feasible range of design variables for centrifugal pumps have been investigated. The present study has suggested a searching procedure to find the feasible ranges using only non-dimensional parameters. The results in the typical specific speed region and the low specific speed region have been presented.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.809-812
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• 2006

This article shows the study on the arresting sound occurrence due to the interaction of the centrifugal Fan and bellmouth suction flow with bellmouth height as variable. It has accomplished to measure of inlet noise and also to analysis suction pressure distribution through experiment and also using CFD. The main cause of sound occurrence was judged with the effect due to static pressure change of bellmouth surface.

• 유체기계공업학회:학술대회논문집
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• 1999.12a
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• pp.61-68
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• 1999

We have measured pressure distributions within the diffuser and pressures at the inlet and outlet of the compressor in orde to match impeller and low-solidity diffuser of 500RT centrifugal refrigerant-compressor which has been developed in LG Cable Ltd. Modified Stanitz equation is used to predict the measured data by tuning several parameters and then is validated. Using the validated parameters and modified Stanitz equation, we have obtained data necessary to design the diffuser.

• 연구논문집
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• s.24
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• pp.107-117
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• 1994

In aerodynamic design of centrifugal compressors, impellers are designed through preliminary design and blade profile generation. In order to find out faults of the initially designed impellers, the detailed informations about internal flow phenomena such as pressure distribution, flow separation, blade loading, etc are essential. These informations can be acquired with flow measurements or computational flow analyses. In this study, we calculated 3-D viscous flow in 4 back-swept impellers which were designed in our laboratory, and analyzed the flow characteristics which influence the performance of impellers.