• Title/Summary/Keyword: 고온설계

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Shape Optimization of Ball Valve for High Temperature (고온용 볼 밸브의 형상 최적화)

  • Kim, Nam-Hee;Byeon, Ji-Hoon;Lee, Kwon-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.1
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    • pp.15-20
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    • 2017

  • The main purpose of the ball valve ball is to be moved by the rotation of the stem when fully open or completely closed. In this study the heat of the initial model, which used a structure interaction analysis technique, tried to examine the structural safety of the high temperature for the ball valve. In the initial model the stress of the exiting sheet was more than the yield strength. We selected two design shapes with variables of length and thickness for the optimization of the sheet. The Kriging interpolation method was applied to a meta-model-based optimization technique. As a result, it was possible to find a thickness and length for the sheet within the yield strength. This was done by measuring the value of the capacity coefficient of the valve and evaluating the performance of the ball valve.

  • https://doi.org/10.5762/KAIS.2017.18.1.15 인용 PDF KSCI

Hot-Fire Test of a Turbopump for a 30 Ton Class Engine in Real Propellant Environment (30톤급 엔진용 터보펌프 실매질 고온시험)

  • Hong, Soon-Sam;Kim, Jin-Sun;Kim, Dae-Jin;Kim, Jin-Han
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2009.05a
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    • pp.11-17
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    • 2009

  • Hot-fire test of a turbopump for a gas generator cycle rocket engine of 30 ton class was carried out in real propellant environment. Liquid oxygen and kerosene were used for the oxidizer pump and the fuel pump, respectively, while hot gas produced by the gas generator was supplied to the turbine. A part of the propellant discharged from the pumps was provided to the gas generator. The turbopump was run stably at both on-design and off-design conditions, satisfying all the performance requirements. This paper describes one of the test cases, where the turbopump was run for 120 seconds at three different operating modes in one test. In terms of performance characteristics of pumps and turbine, the results from turbopump assembly test using real propellant showed a good agreement with those from the turbopump component tests using simulant working fluid.

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Evaluation of Creep-Fatigue Integrity for High Temperature Pressure Vessel in a Sodium Test Loop (소듐 시험루프 내 고온 압력용기의 크리프-피로 건전성 평가)

  • Lee, Hyeong-Yeon;Lee, Dong-Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.38 no.8
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    • pp.831-836
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    • 2014

  • In this study, high temperature integrity evaluation on a pressure vessel of the expansion tank operating at elevated temperature of $510^{\circ}C$ in the sodium test facility of the SEFLA(Sodium Thermal-hydraulic Experiment Loop for Finned-tube Sodium-to-Air heat exchanger) to be constructed at KAERI has been performed. Evaluations of creep-fatigue damage based on a full 3D finite element analyses were conducted for the expansion tank according to the recent elevated temperature design codes of ASME Section III Subsection NH and French RCC-MRx. It was shown that the expansion tank maintains its integrity under the intended creep-fatigue loads. Quantitative code comparisons were conducted for the pressure vessel of austenitic stainless steel 316L.

  • https://doi.org/10.3795/KSME-A.2014.38.8.831 인용 PDF KSCI