http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
수치해석을 통한 이중반전팬을 가진 선풍기의 유동특성분석
서영재,홍일성,권상원 한국전산유체공학회 2020 한국전산유체공학회지 Vol.25 No.2
The objective of this study is to investigate the flow performance analysis for an electric fan with counter-rotating fan. The counter-rotating fan is a device with the method of mutually rotating two moving blades in an opposite direction. It is possible to increase the pressure between fans even with a narrow diameter of a housing and to blow wind over long distances. Because of these advantages, we are developing an electric fan with counter-rotating fan that has the function of an air purifier by installing a filter on the rear. In this paper, the flow characteristic and performance of the counter-rotating fan are clarified by the computational fluid dynamics results according to the change of the blade angle and rotational speed ratio.
서영재,김진규 한국수자원학회 1992 한국수자원학회논문집 Vol.25 No.2
담수화호에서는 온도 및 염도차에 의하여 성층류가 발생하며 수심이 깊은 담수화호의 경우 그 형상이 더욱 뚜렷하다. 본 연구는 깊은 담수화호를 대상으로 내부환경면이 잘 발달된 이층류에 있어서 저층배수관의 유출수 염분농도를 실험을 통하여 규명하였다. 실험에 이용된 저층배수관은 세가지 유형으로 유입층과 배수관의 유출수 염분농도차를 무차원으로 수식화 하였고 유입층의 상층부 흐름이 순간적으로 배수되는 밀도층의 한계조건을 밀도 Froude수와 배수관의 직경 및 수심 A problem of outlet salinity from a stratified fluid with a well developed interface thickness consisting of an upper and lower layer differing slightly in density is considered. Three kinds of apparatus were used for the experimental test and salinity di
Late-Onset Post-radiation Lymphedema Provoked by Bee Venom Therapy: A Case Report
서영재,정용성,박효식,박신우,최자영,정강재,임종엽 대한재활의학회 2018 Annals of Rehabilitation Medicine Vol.42 No.4
Lymphedema is a common complication associated with cancer itself or with cancer treatment. Lymphedema infrequently occurs after drug therapy. Bee venom is one of the materials used in acupuncture, and it has been used in the treatment of a variety of inflammatory diseases including arthritis. We report a 74-year-old male patient with late-onset post-radiation lymphedema provoked by bee venom therapy. He was free of lymphedema for 5 years after the complete remission of prostate cancer which had been treated with transurethral resection and radiation therapy. The patient developed left leg swelling after undergoing bee venom therapy for left hip pain. Computed tomography and lymphoscintigraphy showed lymphedema without tumor recurrence or infection. The lymphatic system was suspected to be injured by bee venom therapy and lymphedema was provoked. Bee venom therapy should be used cautiously in patients prone to lymphedema.
서영재,김진규 한국수자원학회 1992 물과 미래(한국수자원학회지) Vol.25 No.2
담수화호에서는 온도 및 염도차에 의하여 성층류가 발생하며 수심이 깊은 담수화호의 경우 그 형상이 더욱 뚜렷하다. 본 연구는 깊은 담수화호를 대상으로 내부환경면이 잘 발달된 이층류에 있어서 저층배수관의 유출수 염분농도를 실험을 통하여 규명하였다. 실험에 이용된 저층배수관은 세가지 유형으로 유입층과 배수관의 유출수 염분농도차를 무차원으로 수식화 하였고 유입층의 상층부 흐름이 순간적으로 배수되는 밀도층의 한계조건을 밀도 Froude수와 배수관의 직경 및 수심의 함수로 방정식을 유도하였다. A problem of outlet salinity from a stratified fluid with a well developed interface thickness consisting of an upper and lower layer differing slightly in density is considered. Three kinds of apparatus were used for the experimental test and salinity differences between inlet layer and outlet discharge were estimated by the functional relationship using the dimensionless values. For the critical incipient condition of withdrawal of upper layer, Densimetric Froude number is correlated by the inlet diameter and depth ratio in the tank.
이중반전 팬 선풍기의 하우징 형상에 따른 유동 특성 분석
서영재(Y.J. Seo),홍일성(I.S. Hong),권상원(S.W. Kwon) 한국전산유체공학회 2021 한국전산유체공학회지 Vol.26 No.1
The objective of this study is investigate the flow performance analysis with various housings of an electric fan with counter-rotating fan. The housing of an electric fan serves as a guide for flow and has the effect of increasing flow straightness. Because of this advantage, the counter-rotating fan is designed to be used for ventilation purposes. The housing shape was modeled by selecting the radius of curvature as parameter. In this paper, the internal and external flow characteristics and performance of the counter-rotating fan were analyzed through CFD results according to the radius of curvature of the housing.