LNG 연료공급장치 적용을 위한 이중배관 시스템의다물리 CAE 기반 설계 검증에 관한 연구

Abstract

This study was carried out for design verification based on CAE of double piping system used in LNG fuel supply system. The double pipe is composed of an inner pipe through which LNG flows, an outer pipe through which air flows, and support for supporting between the inner pipe and the outer pipe. In order to apply the developed double piping system to the fuel supply system, it is necessary to secure air circulation characteristics, heat stability, structure stability, and vibration safety against gas leakage. Therefore, the verification of multiphysics research is required. The double piping used for LNG fuel supply system is an important equipment used in the engine room of LNG propulsion ships and safety design is very important because of the risk of secondary damage caused by LNG leakage. Therefore, in this study, multiphysics CAE technology is applied to review the safety while satisfying the design requirements of the developed double pipe. Considering the pressure loss of the fan, machine engine and pipeline, the predicted actual flow condition was predicted within the allowable flow range. In addition, the structural and dynamic stability analysis showed that the support operates in the safe area.