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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제10권 제4호
발행연도
2002.7
수록면
223 - 233 (11page)

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초록· 키워드

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The air distribution duct with multiple outlets is an essential part of automotive air-conditioning system in a bus. The estimation of airflow rate in an automotive air-conditioning duct is typically very complicate due to large variations in cross-sectional area and abrupt changes in flow direction, as well as unbalanced distribution of the flow. In this paper, the flow characteristic in a duct with multiple outlets is investigated through experiment, CFO simulation and a one-dimensional simulation. Numerical simulations have been performed for two simplified air conditioning ducts with multiple outlets used in a medium bus. The three dimensional Navier-Stokes code was used to evaluate the overall pressure, velocity field, and distribution rate at each diffuser according to the change of various design parameters such as ratio of cross-seclional area and radius of bifurcated region. In addition, a one-dimensional program based on Bemoulli equation was developed to obtain optimum diffuser area required to equalize discharge flow rate at each outlet. As a result of this study, optimized diffuser area of design variable by one-dimensional program was very reasonable as compared to the trend deduced from CFO Simulation. Therefore, the simple and convenient one-dimensional analysis developed in this study can be applied in practical design procedure for air-conditioning duct.

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ABSTRACT

1.서론

2.수치해석

3.해석 결과 및 고찰

4.최적화

5.결론

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