http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
원자로 용기 외벽 냉각을 통한 차세대 원전 관통부의 건전성 평가를 위한 지속 가열 실험 연구
강경호(K. H. Kang),박래준(R. J. Park),민병태(B. T. Min),김상백(S. B. Kim),이기영(K. Y. Lee),박종균(J. K. Park) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Under the same induction heating power histories, two tests named as KNGR-SUS-DRY and KNGR-SUS-EXT<br/> were performed varying the cooling conditions at the outer surface of the lower head vessel. The maximum heat flux<br/> imposed to the inner surface of the lower head vessel was about 0.35 MW/m2 in both the tests. In the KNGR-SUS-DRY<br/> test performed without the external vessel cooling, the inner surface of the lower head vessel was ablated by the<br/> thickness of 45 mm, which indicated the total ablation of the welding material. Although the welding material was<br/> ablated in all, the penetration tube was not ejected outside the lower head vessel due to the thermal expansion of the<br/> lower head vessel and the penetration tube. In the KNGR-SUS-EXT test performed with the external vessel cooling,<br/> however, the thickness of the ablation is about 10 mm at most.
복합혼합날개를 장착한 5×5 봉다발에서 부수로 혼합 및 임계열유속 실험 연구
강경호(K. H. Kang),신창환(C. H. Shin),추연준(Y. J. Choo),윤영중(Y. J. Youn),박종국(J. K. Park),문상기(S. K. Moon),천세영(S. Y. Chun) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Experiments were performed to determine the thermal (or turbulent) diffusion coefficient (TDC) and to investigate the critical heat flux (CHF) performance in the 5×5 rod bundle with 5 unheated rods which are supported by Hybrid Mixing Vane. In this study, HFC-134a fluid was used as working fluid and the fluid temperature were measured in the important subchannels. To determine the TDC value, the measured fluid temperatures were compared with the predicted values obtained from the MATRA code. The best optimized value of β was found to be 0.02 by considering prediction statistics, i.e., average and standard deviations of the differences between the experimental results and code calculations. Using the best optimized value of β as 0.02, the MATRA code predicts the test results of the fluid temperature within ±1.0 % of error. According to the experimental results on CHF of 5 non-heating guide tubes, the case with non-heating guide tube showed a little good performance in terms of CHF.
2층으로 성층화된 풀 내에서의 자연대류 열전달과 고화현상에 대한 연구
김종태(J. Kim),강경호(K. S. Kang),김상백(S. B. Kim),김희동(H. D. Kim) 한국전산유체공학회 2001 한국전산유체공학회지 Vol.6 No.1
The natural convection heat transfer and solidification in a stratified pool arc studied. The flow and heat transfer characteristics in a heat generating pool are compared between single-layered and double-layered pools. And local Nusselt number distributions on outer walls are obtained to consider thermal loads on a vessel wall. The cooling and solidification of Al₂O₃/Fe melt in a hemispherical vessel are simulated to study the mechanism of heat transfer and temperature distribution. A unstructured mesh is chosen for this study because of the non orthogonality originated from the boundaries of double-layered pool. Interface between the layers is modeled to be fixed. With this assumption mass flux across the interface is neglected, but shear force and heat flux are considered by boundary conditions. The colocated cell -centered finite volume method is used with the Rhie-Chow interpolation to compute cell face velocity- To prevent non- physical solutions near walls in case body force is large the wall pressure is extrapolated by the way to include body force. The numerical solutions calculated by current method show that averaged downward heat flux of the double-layered pool increases compared to single-layered pool and maximum temperature occurs right below the interface of the layers.
유진목(Z . M . Yoo),안태훈(T . H . Ahn),인광호(K . H . In),조재연(J . Y . Cho),강경호(K . H . Kang),유세화(S . H . Yoo) 대한내과학회 1989 대한내과학회지 Vol.36 No.2
N/A To evaluate the changes of alveolar epithelial permeability in chronic renal failure (CRF) and diabetes mellitus (DM), we studied the index of alveolar permeability in 9 normal controis, 9 CRF patients under regular hemodialysis treatment and 15 DM patients. The half time clearance from lung to blood (tl/2LB) of radioactivities was calculated by a technetium labelled diethylene triamine pentaacetic acid ( 99mTc- DTPA) radioaerosol inhalation scan. The tl/2LB was not different between the control group (RUL 47.44±6. 61 min, RLL 51.44±6.61 min) and CRF group (RUL 43.72±9.80 min, RLL 45.35±7.26 min). The tl/2 did not differ between the control group and DM group with (RUL 56.01±16.80 min, RLL 49.00±19.23 min) or without (RUI. 54.B4±8.33 min, RLL 56.77±7.80 min) retinopathy. These results suggest that alveolar epithelial permeability is not significantly inceased in CRF patients under regular hemodialysis, and it is al salso not changed in DM patilents, irrespective of the presence of diabetic retinopathy.
Ciprofloxacin의 각종 감염증에 대한 임상효과에 관한 연구
강경호,송관규,유혜경,강숙경,김민자,박승철,김진호,김대원 대한감염학회 1987 감염 Vol.19 No.4
85 patients 37M and 48F, ranging in age between 18-75yrs(39±16), were treated with Ciprofloxacin at daily odse of 100㎎ bid Ⅳ (49) or 500㎎ bid p.o (30), or combined use (6) Infections included: pneumonia (19) bronchitis (15), pharyngotonilitis (1), GI tract infection (15), acute pyelonephritis (26), cystitis (2), sepsis (6), osteomyelitis (1). Severity and mode of infection were; severe 13, moderate 71, mild 1 and acute form 82, chronic 2, recurrent 1. Duration of symptoms before therapy was 4.8±4.5 days and total dose, Duration of Drug were Ⅳ: 2882±1018㎎ 7.1±2.4 dyas oral: 7167±1858㎎, 7.2±1.9 days Ⅳ and oral: 1600±858㎎/4500±1039㎎⁴±0.9/4.5±1.5 days. Isolated major organisms were; 1) pneumonia (19)-k. pneumonia (7), E. cloaceae (4), S. pneumonia(3), P. aeruginosa (2), 2) Bronchitis (15)-S. pneumonia (8), S. aureus (2), E. cloaceae (2), K. Oxytoca (2). 3) GI tract infection(15)-s. typhi (14), S. parathphi (1). 4) acute pyelonephritis (26)-E. coli (17), P. aeruginosa (4), Enterococcus (2), P. mirabilis (1). 5) cystitis (2)-E. coli (1), P. aeruginosa (1). 6) Sepsis (6)-E. coli (6), K. pneumonia (1). 7) osteomyelitis (1)-S. epidermis (1). Clinical result were resolution (64 case-75%), improvement (16-18.3%), undetermined (1-1.1%) failure (4-4.7%). Therapy result were as follows: 66 case (77.7%) were completely resolved 1 case of undetermined course in CVA with pyelonephritis. 14 case (16.5%) of partial response were 6 cases of RTI, 5 case of UTI, 5 case of thphoid fever underlying idsease; rectal cancer 1 Diabetes mellitus 4). 4 case (4.7%) of failure were 2E. coli pneunonia witn liver cirrhosis, 1 s. epidermis osteomyelitis with lymphoma and 1 enterococcus sepsis. Over all efficacy of therapy was 94.2% in 85 cases. Adverse reaction was observed in 1 patient which was fever and rash.