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강승규(Seung-kyu Kang),윤준용(Joon-yong Yoon),강신형(Sin-hyoung Kang),성낙원(Nak-won Sung) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
This study proposes a modified bifurcation model with a computational fluid analysis according to variation of a bifurcation geometry. FLUENT is used for a calculation of the head losses in case of a generation and a pumping. The pressure, velocity field and turbulent intensity are simulated in a bifurcation. With consideration about these flow properties, we propose the modified model to improve a flow efficiency and reduce a sound. The proposed model is able to cut down a head loss by 45% when a generation and 36% when a pumping.
신정관(Jung-Kwan Sin),김경훈(Kyung-Hoon Kim),강신형(Shin-Hyoung Kang) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.3
A centrifugal compressor for HFC-134a has been newly designed and developed. Flow analysis using commercial programs was used to evaluate performance and internal flow of the impeller, inlet guide vane and diffuser etc. The purpose of this study is to establish the design theory necessary to the development of HFC-134a centrifugal compressors and to supply basic data related to design by reviewing design values and experimental values through the performance test. The compressor for HFC-134a was also investigated experimentally to check compression performance. The calculated data coincide the test results of compressor. The data obtained in the present study are useful for design of HFC-134a centrifugal compressors.