• 제목/요약/키워드: temperature zone

검색결과 1,877건 처리시간 0.025초

사면보강재의 강우 및 온도에 의한 변형 해석 (Deformation Estimation of Slope Reinforced Materials by Rain and Temperature)

  • 홍성진;장기태;한희수
    • 지구물리
    • /
    • 제8권2호
    • /
    • pp.97-103
    • /
    • 2005
  • It is necessary, in the light of the importance of long-term slope stability problem, to develop a simple method or tool which can figure out the possible failure zone resulted from weathering effect and other factors. The FBG sensor system is used to estimate the correlations between the temperature and the slope in Yunhwajae, and to find a failure zone in slopes effectively. This research is to seek for the correlation between the soil temperature distribution and the strain distribution in a active zone by analyzing the data from the in-situ measurement so that the possible failure zone should be well defined based on the correlation. The zone of high temperature fluctuation can be regarded as one of the possible sliding zone due to the weathering effect while the constant temperature depth of the ground, if exists, would not be relatively affected by the weathering process.

  • PDF

원통 용접부의 온도분포 해석 (An Analysis on the Temperature Distribution at the Circumferential Weld Zone)

  • 남궁재관
    • 한국공작기계학회논문집
    • /
    • 제18권2호
    • /
    • pp.221-227
    • /
    • 2009
  • The study of the solidification process of welded metal is carried out using the finite element method, which is the basic study for optimal design. In the analysis of temperature, the welded zone is cooled as the result of heat conduction to the base metal and heat transfer to the circumference. In the early phase of the temperature in base metal zone is little changed. But after the rise in temperature the whole area is cooled gradually and uniformly with the lapse of 10 seconds, and a temperature change is hardly occurred in the radial direction but in the axial direction.

에어믹서가 설치된 공조기 혼합실 내의 온도분포에 관한 실험적 연구 (An Experimental Study of Temperature Profiles in Mixing Zone of AHU with an Air Mixer)

  • 박권종;이석준;장영근
    • 설비공학논문집
    • /
    • 제18권12호
    • /
    • pp.999-1006
    • /
    • 2006
  • A study of temperature profiles in mixing zone of AHU (air handling unit) can contribute greatly to enhance performance of AHU system, so the study on the temperature distribution between RA (return air) and OA (outdoor air) is important to analyze the mixing characteristics in a mixing zone of AHU. Accordingly, the temperature profiles during RA (return air) and OA (outdoor air) supply process into mixing zone of AHU with an air mixer are studied experimentally. The effect of air mixer, OA temperature and RA/OA flow rate are studied in detail. In this study, the results show that the mixing efficiency is all high for installed the air mixer. The more OA temperature increase and OA flow rate decrease, the more mixing efficiency is high.

동축류 버너에서 생성된 부분 예혼합 화염을 이용한 화염 온도 측정 검정원 연구 (Study on the partially premixed flames produced by a coflow burner as temperature calibration source)

  • 박철웅;한재원;신현동
    • 한국연소학회:학술대회논문집
    • /
    • 한국연소학회 2000년도 제21회 KOSCO SYMPOSIUM 논문집
    • /
    • pp.160-167
    • /
    • 2000
  • We investigated a uniform temperature zone, produced by double flame structure of a coflow CH4/air partially premixed flame, to be used as a temperature calibration source for laser diagnostics. A broadband N2 CARS(coherent anti-Stokes Raman spectroscopy) system with a modeless laser was used for temperature measurement. When the stoichiometric ratio was 1.5, we found the uniform temperature zone in radial direction of the flame of which the averaged temperature was 2110 K with standard deviation 24 K. In the stoichiometric ratio range between 2.0 and 2.5, we found very stable temperature-varying zones in vertical direction at the center of the flame. The size of the zone was approximately 15 mm and it covered a temperature range from 300 K to 1900 K. We also suggest that this zone can be used as a calibration source for 2-D PLIF(planar laser induced flurescence) temperature measurement.

  • PDF

Zone-melting Process of NdBaCuO under Low Oxygen Pressure

  • Soh, Dea-Wha
    • Transactions on Electrical and Electronic Materials
    • /
    • 제3권2호
    • /
    • pp.24-27
    • /
    • 2002
  • The NdBaCuO superconductor samples were zone-melted in low oxygen partial pressure (1%O$_2$+99%Ar). The zone-melting temperature was decreased about 12$0^{\circ}C$ film 1,06$0^{\circ}C$, the zone-melting temperature in air. Thus the loss of liquid phase (BaCuO$_2$ and CuO) was reduced during: the zone-melting process. The content of non-superconducting phase Nd422 in zone-melted NdBaCuO samples was clearly decreased and, therefore, the substitution of Nd for Ba was occurred. The superconductivity of zone-melted Nd$_{1+x}$Ba$_{2-x}$Cu$_3$O$_{y}$ prepared under low oxygen partial pressure was distinctively improved.d.d.d.

Preparation of Zone-melted NdBaCuO under Low Oxygen Pressure

  • Soh, Dea-Wha;Fan, Zhan-Guo;Gao, Wei-Ying;Jeon, Jong-Woo
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
    • /
    • pp.85-88
    • /
    • 2001
  • The NdBaCuO superconductor samples were Zone-melted in low oxygen partial pressure (1% $O_{2}+ 99% Ar$ ). The Zone-melting temperature was decreased about $120^{\circ}C$ from $1060^{\circ}C$ the zone-melting temperature in air. Thus the loss of liquid phase ($BaCuO_{2}$ and CuO) was reduced during the zone-melting process. The content of non-superconducting phase Nd422 in zone-melted NdBaCuO samples was clearly decreased, so was the substitution of Nd for Ba. The superconductivity of zone-melted $Nd_{1+x}Ba_{2-x}Cu_{3}O_{y}$ prepared under low oxygen partial pressure was distinctively improved.

  • PDF

Preparation of Zone-melted NdBaCuO under Low Oxygen Pressure

  • wha, Soh-Dea;guo, Fan-Zhan;ying, Gao-Wei;Jeon Yongwoo
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2001년도 추계학술대회 논문집
    • /
    • pp.85-88
    • /
    • 2001
  • The NdBaCuO superconductor samples were Zone-melted in low oxygen partial pressure (1% O$_2$+99% Ar). The Zone-melting temperature was decreased about 120$^{\circ}C$ from 1060$^{\circ}C$ the zone-melting temperature in air. Thus the loss of liquid phase (BaCuO$_2$ and CuO) was reduced during the zone-melting process. The content of non-superconducting phase Nd422 in zone-melted NdBaCuO samples was clearly decreased, so was the substitution of Nd for Ba. The superconductivity of zone-melted Nd$\sub$1+x/Ba$\sub$2-x/Cu$_3$O$\sub$y/ prepared under low oxygen partial pressure was distinctively improved.

  • PDF

조간대에서 조위에 따른 기온과 수온 변화 : 여수 오도섬 (Variations in Air Temperature and Water Temperature with Tide at the Intertidal Zone : Odo Island, Yeosu)

  • 조원기;강동환;김병우
    • 한국환경과학회지
    • /
    • 제31권12호
    • /
    • pp.1027-1038
    • /
    • 2022
  • The intertidal zone has both land and marine characteristics and shows complex weather environments. These characteristics are suited for studying climate change, energy balance and ecosystems, and may play an important role in coastal and marine weather prediction and analysis. This study was conducted at Odo Island, approximately 300m from the mainland in Yeosu. We built a weather observation system capable of real-time monitoring on the mud flat in the intertidal zone and measured actual weather and marine data. Weather observation was conducted from April to June 2022. The results showed changes in air temperature and water temperature with changes in the tide level during spring. Correlation analysis revealed characteristic changes in air temperature and water temperature during the day and night, and with inundation and exposure.

완충공간의 설치가 이유자돈사 온·습도변화 및 자돈 폐사율에 미치는 영향 (Effects of Buffering Zone Installation on the Temperature and Humidity of Pig House and Mortality of Weaned Pig)

  • 이준엽;이동현;우샘이;최희철
    • 한국축산시설환경학회지
    • /
    • 제21권3호
    • /
    • pp.77-82
    • /
    • 2015
  • This survey was conducted to collect basic data about the effect of buffering zone installation in weaned pig house. Buffering zone was installed either inside or outside of pig house to compare changes of temperature, humidity and air velocity of pig room. The body weight and mortality of weaned pigs in house with buffering zone was also measured. There was no difference in temperature, humidity and air velocity between inside and outside buffering zone. Mortality of weaned pig in house with buffering zone was drastically decreased compare to pigs in house without buffering zone that could be useful to maintain constant temperature and decrease mortality.

Numerical Modelling of Temperature Distribution and Pressure Drop through the Layered Burden Loading in a Blast Furnace

  • Yang, Kwang-Heok;Choi, Sang-Min;Chung, Jin-Kyung
    • 한국연소학회지
    • /
    • 제14권4호
    • /
    • pp.1-6
    • /
    • 2009
  • Analysis of the internal state of the blast furnace is necessary to predict and to control the operating conditions. Especially, it is important to develop models of the blast furnace to predict the cohesive zone because shape of the cohesive zone influences overall operating conditions of blast furnace such as gas flow, chemical reactions and temperature. Because many previous blast furnace models have assumed cohesive zone to be fixed, it was not possible to evaluate the shape change of cohesive zone in relation with operating conditions such as PCR, blast condition, and production rate. In this study, an axi-symmetric 2-dimensional steady state model is proposed to simulate blast furnace processes. In this model, cohesive zone is determined by the solid temperature. Finite volume method is employed for numerical simulation. To find location of the cohesive zone, entire calculation procedure is iterated until converged. Through this approach, shape of the cohesive zone, velocity and temperature within the furnace are predicted from the model.

  • PDF