CAJ | 학술논문

建立船舶典型充汽管路三维计算模型，运用计算流体力学方法进行充汽管路流体水动力特性数值研究，捕捉流体压力、流速、密度、湍流动能等关键参数分布规律，基于流致振动预测机理，揭示与流致振动密切相关的流体流动能量。计算结果显示：充汽管路弯头部位产生由外壁向内壁发展的二次流动现象，导致弯头区域呈现内壁压力小、流速高、密度小、湍流动能及耗散率高等情况；基于流体流动能量分布规律，充汽管路弯头区域能量出现最大值，且弯头内壁流动能量高于外壁，可以预测充汽管路弯头内壁侧承受流致振动破坏较严重，实际充汽管路检测数据验证了数值预测结果。
건립선박전형충기관로삼유계산모형，운용계산류체역학방법진행충기관로류체수동력특성수치연구，포착류체압력、류속、밀도、단류동능등관건삼수분포규률，기우류치진동예측궤리，게시여류치진동밀절상관적류체류동능량。계산결과현시：충기관로만두부위산생유외벽향내벽발전적이차류동현상，도치만두구역정현내벽압력소、류속고、밀도소、단류동능급모산솔고등정황；기우류체류동능량분포규률，충기관로만두구역능량출현최대치，차만두내벽류동능량고우외벽，가이예측충기관로만두내벽측승수류치진동파배교엄중，실제충기관로검측수거험증료수치예측결과。
A three dimensional calculation model of typical ship charging pipes is established in this pa?per,where its hydrodynamic characteristics are investigated using the CFD method. The distribution of key parameters such as pressure,velocity,density,and turbulence kinetic energy are obtained. Based on the prediction mechanism of flow induced vibration,the flow energy,which is closely related to flow induced vibration,is revealed. The calculated results show that the secondary flow phenomenon,occurring from the outer wall to the inner wall,is most prominent at the elbow of charging pipes. This secondary flow could lead to low pressure and density,higher velocity and turbulence kinetic energy with the region. Based on fluid flow-energy distributions,the flow-energy are estimated to reach its maximum value at the elbow;meanwhile,the flow-energy for the inner wall will be higher than that for the outer wall. These hy?drodynamic results suggest that the flow induced vibration damage for the inner wall around the elbow could be rather serious,which is then verified with actual test data.