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    초록·키워드

    In this paper, a numerical study has been carried out to investigate the influence of uneven blade spacing in the multiblade turbomachinery. In order to achieve an appropriate range of design and to explain the interactions between the different blade spacing and the performance in the multiblade turbomachinery system, the three-dimensional computational fluid dynamics (CFD) has been applied. Several geometric parameters of uneven blade spacing, the amplitude and the pattern of a trigonometrical function, are employed to analyze the performance in the multiblade turbomachinery. When amplitude of the trigonometrical function was increased, we could confirm that turbomachiney's performance was decreased. Also, we could confirm that turbornachiney's performance was changed when pattern of the trigometrical function was changed. These results may be used in the application of uneven pitch to reduce noise. It is suggested that CFD is a useful tool in the design of the multiblade turbomachinery.

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      UCI(KEPA) : I410-ECN-0101-2009-554-014761731