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정압밸브 폐쇄과정동안의 비정상유동특성 및 서지효과 연구
신창훈(C. H. Shin),임지현(J. H. Im),안승희(S. H. Ahn),정종태(J. T. Jeong),허재영(J. Y. Her) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Since the interior shape of a pressure regulator is complex, the change of the flow characteristics aduring the valve closing process may be not usual. So, we have carried numerical simulations with the CFD method to clarify the unsteady-state flow-characteristics during the valve closing process. As the result, we have understood the pressure regulating mechanism in detail, examined the possibility of the erosion at the downward walls after the PCV and investigated to satisfy the hydrocarbon dew point and water dew point standard to prevent problems of condensation or problems of freezing in pipelines in each opening ratio during the valve closing process. Futhermore, we have surveyed the occurring of the surge effects and studied the characteristics of the wave propagation after the valve closing.