http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[論文] 冷却水의 流動速度와 溫度가 담금效果에 미치는 影響
민수홍(S. H. Mim),김상열(S. Y. Kim) 한국자동차공학회 1982 오토저널 Vol.4 No.3
It has already been known that quenching effect is influenced greatly by stirring and changing coolant's temperature on quenching.<br/> But according to the past investigations its effect has not been taken into consideration quantitatively in the cooling process.<br/> The purpose of this study is that the influence of flow rate and temperature on the quenching effect of cooling water as quenching medium is quantitatively examined by using the open channel.<br/> The stream of water in this study is turbulent flow. The temperature of the specimen made of pure copper is measured by CA thermocouple in the vicinity of the surface and recorded by an automatic recorder during the quenching process in city water.<br/> The results obtained are as follows;<br/> 1. The quenching effect of cooling water generally increases with Reynolds Number (characteristic length: specimen diameter) as shown in the experimental formula; H-H_50=1.7 x 10^-8 (Re_D) (Pr)^I.77 D^-I.<br/> But at the realm of Reynolds Number from 1.2 x 10^4 to 9.2 x 10^4, the increasing rate of quenching effect shows little increase.<br/> 2. The increasing rate of quenching effect was increased under the flow rate of 221 cm/sec. On the other hand, it was decreased below this flow rate.<br/> 3.The quenching effect was influenced by the water temperature and the flow rate. But it was rather dependent upon the former than the latter.<br/> 4. Although the quenching effect appeared loosely in the water temperature of 50°C, it was shown that the qunching effect increased in the low flow rate of 31 cm/sec. comparing with the still water.<br/> 5. It is desirable to design the quenching system to be over 1.2 x 10^4 in Reynolds Number or over, 3000cm^-1 in V /v in order to increase the quenching effect of the system using open channel.
위내시경검사에 사용한 Hyoscine - N - Butylbromide ( Buscopan ) 작용의 임상적 연구 ( Clinical Study on Buscopan
민수홍 ( S. H. Min ),김영식 ( Y. S. Kim ),정충수 ( C. S. Chung ) 대한내과학회 1969 대한내과학회지 Vol.12 No.8
During gastric endoscopy favourable pictures can be obtained of the condition of the stomach, when spasms are effectively released and secretion inhibited. In this study the spasmolytic effect of Buscopan during gastric endoscopy was observed. For this pur
유선목 ( S. M. Yoo ),이진희 ( J. H. Lee ),민수홍 ( S. H. Min ),박경남 ( K. N. Park ) 대한내과학회 1968 대한내과학회지 Vol.11 No.5
In this report, a cases of bronchobiliary fistula is reported. A 15 year-old girl has complanined of productive cough and expectorated bile for about four months. On the physical examination, there were epigastric tenderness, palpable liver of 3 finger bre