• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2002년도 유체기계 연구개발 발표회 논문집
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• pp.439-443
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• 2002

In this study, three-dimensional incompressible viscous flow analysis and optimization using response surface method are presented for the design of a jet fan. Steady, incompressible, three-dimensional Reynolds averaged Wavier-Stokes equations are used as governing equations, and standard k-$\epsilon$ turbulence model is chosen as a turbulence model. Governing equations are discretized using finite volume method. Sweep angles and maximum thickness of blade are used as design variables for the shape optimization of the impeller in response surface method. The experimental points which are needed to construct response surface are obtained from the D-optimal design and Full Factorial design and relations between design variables and response surface are examined.

• 대한기계학회논문집B
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• 제30권8호
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• pp.715-721
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• 2006

In the present work, nozzle shape of a jet fan is optimized numerically using three-dimensional Reynolds-averaged Navier-Stokes analysis. Standard $k-{\epsilon}$ model is used as a turbulence closure. Response surface method is employed as an optimization technique. The objective function is defined as maximum throw distance. Three geometric variables, i.e., length and angle of nozzle, and interval between two nozzles, are selected as design variables. As the main result of the optimization, the throw distance has been improved effectively.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2002년도 학술대회지
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• pp.635-638
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• 2002

In this study, three-dimensional imcompressible viscous flow analysis and optimization using response surface method are presented for the design of a jet fan. Steady, imcompressible, three-dimensional Reynolds averaged Wavier-Stokes equations are used as governing equations, and standard $k-{\varepsilon}$ turbulence model is chosen as a turbulence model. Governimg equations are discretized using finite volume method. Sweep angles are used as design variables for the shape optimization of the impeller in response surface method. The experimental points which are needed to construct response surface are obtained from the D-optimal design and finally the shape of impeller Is achieved from using a numerical optimization for the response surface which is obtained from CFD.

• 대한조선학회논문집
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• 제37권3호
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• pp.57-68
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• 2000

이착륙 속력을 줄이기 위해 날개 밑으로 프로펠러 후류를 불어넣어 날개와 수면사이의 압력을 증가시키는 PAR(Power Augmented Ram) 효과는 해면효과익선의 성능을 크게 향상시킨다. 본 논문에서는 풍동실험을 통해 이러한 PARWIG(Wing in Ground)선의 공력특성을 연구하였으며 송풍기(blower)와 덕트(duct)를 사용한 제트분사를 프로펠러 후류로 대신하였다. 제트의 분사속도, 분사위치(수평 및 수직 방향), 분사각 및 덕트 직경 변화에 대해 20인승 PARWIG선의 1/25 축소 모형선의 지면과의 고도, 앙각 및 플랩각의 변화에 따른 양력, 항력 및 피치모멘트를 계측하여 공력특성을 비교하였다. 적절한 PAR효과의 사용은 양력을 크게 증가시키며 최대 4의 양력계수까지 얻을 수 있었다.