http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 배황 (검색결과 56 건)
- 무료
- 기관 내 무료
- 유료
-
배황,한용운,Bae, Hwang,Han, Yong Oun 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.11
The turbulence structure of e. tip vortex generated by e. fixed wing was investigated with the use of two-dimensional laser Doppler velocimetry. The velocity field, composed of circumferential end axial components, was measured on the vertical section to the vortex trail, located at 2C downstream from the wing tip in the incoming flow condition of $Re=2.24{\times}10^5$. A quasi 3-dimensional measurement technique by use of 2-dimensional LDV system was suggested for Reynolds stresses and the higher moments. The validity of this technique was confirmed with the uncertainty analysis. The budget of the turbulence kinetic energy was analyzed by those results in the radial direction of the vortex core. It is resulted that the production is to be very likely balanced with the dissipation in most range of the vortex core.
-
배황,전지한,윤은구,정영종,임성원,박현식 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.2
The natural circulation phenomena occurring in fully integrated nuclear reactors are associated with aunique formation mechanism. The phenomenon results from a structural feature of these reactorsinvolving upward flow from the core, located in the central-bottom region of a single vessel, anddownward flow to the steam generator in the annulus region. In this study, to understand the naturalcirculation in a single vessel involving a multi-layered flow path, single-phase and two-phase naturalcirculation tests were performed using the SMART-ITL facility, and validation analysis of the TASS/SMR-Scode was performed by comparing the corresponding test results. Three single-phase natural circulationtests were sequentially conducted at 15%, 10%, and 5% of full-scaled core-power without RCP operation,following which a two-phase natural circulation test was successively conducted with an artificialdischarge of coolant inventory. The simulation capability of the TASS/SMR-S code with respect to thenatural circulation phenomena was validated against the test results, and somewhat conservative butreasonably comparative results in terms of overall thermalhydraulic behavior were shown
-
배황,김동억,류성욱,이성재,박현식 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.5
Three small-break loss-of-coolant accident (SBLOCA) tests with safety injection pumps were carried out using the integral-effect test loop for SMART (System-integrated Modular Advanced ReacTor), i.e., the SMART-ITL facility. The types of break are a safety injection system line break, shutdown cooling system line break, and pressurizer safety valve line break. The thermale-hydraulic phenomena show a traditional behavior to decrease the temperature and pressure whereas the local phenomena are slightly different during the early stage of the transient after a break simulation. A safety injection using a high-pressure pump effectively cools down and recovers the inventory of a reactor coolant system. The global trends show reproducible results for an SBLOCA scenario with three different break locations. It was confirmed that the safety injection system is robustly safe enough to protect from a core uncovery.
-
-
-
-
피동 주입 시험 장치의 척도 해석 및 설계 방법론 연구
배황(Hwang Bae),이민규(Minkyu Lee),류성욱(Sung-Uk Ryu),신수재(Soo Jai Shin),김영인(Young-In Kim),이성재(Sung-Jae Yi),박현식(Hyun-Sik Park) 한국유체기계학회 2016 한국유체기계학회 논문집 Vol.19 No.5
A design methodology of the modeled test facility to conserve an injection performance of a passive safety injection system is proposed. This safety injection system is composed of a core makeup tank and a safety injection tank. Individual tanks are connected with pressure balance line on the top side and injection line on the bottom side. It is important to conserve the scaled initial injection flow rate and total injection time since this system can be operated by small gravity head without any active pumps. Differential pressure distribution of the injection line induced by the gravity head is determined by the vertical length and elevation of each tank. However, the total injection time is adjustable by the flow resistance coefficient of the injection line. The scaling methodology for the tank and flow resistance coefficient is suggested. A key point of this test facility design is a scaling analysis for the flow resistance coefficient. The scaling analysis proposed on this paper is based on the volume scaling law with the same vertical length to the prototype and can be extended to a model with a reduced vertical length. A set of passive injection test were performed for the tanks with the same volume and the different length. The test results on the initial flow rate and total injection time showed the almost same injection characteristics and they were in good agreement with the design values.
-
-
다중 블록 격자를 이용한 원뿔 직관 모양의 벌류트 유동의 수치해석
배황(H. Bae),강현구(H.G. Kang),윤주식(J.S. Yoon),박기철(K.C. Park),장근식(K.S. Chang) 한국전산유체공학회 2006 한국전산유체공학회지 Vol.11 No.1
Numerical investigation of a centrifugal compressor volute having a modified straight conical duct has been made. Three-dimensional Reynolds-Averaged Navier-Stokes equations with k-ε turbulence equation are solved To avoid coordinate singularity at the central axis of the duct, multi-block H-type grid is generated on the circular cross-sections of the volute and stretched toward the solid wall boundary. We obtained numerical results with three different mass flow rates at the volute inlet, namely, with the inlet conditions that give small, medium and large mass flow rates at the outlet of the conical duct. Agreement with the experimental results is observed.
-
배황(Hwang Bae),이진원(Jin-Won Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Generation of compound particle by heterogeneous growth of nitrogen on Argon seed particles in a supersonic expansion was numerically investigated. Gas dynamic equations tor 1D supersonic flow was solved together with the classical nucleation theory and Hill's growth model. The combination of heterogeneous growth on homogeneously nucleated seeds was very effective in increasing the final particle size and number concentration. For comparable pressure and temperature conditions, the new process increased particle mass by a factor of 10 relative to the case of pure gas expansion. Increase in particle size came predominantly from the enhanced heterogeneous condensation of nitrogen, and the growth by argon condensation could even be reduced relative to the case of pure gas expansion.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
