CAJ | 학술논문

数值分析压强对三相流场中40Cr 试件冲蚀与空蚀交互磨损的影响;试验研究不同压强下交互磨损过程中40Cr试件的失重量、空泡的密度及分布的变化规律,分析压强对40Cr试件的作用机制.结果表明:特定工况下,40Cr试件交互磨损失重量随压强的增大呈高斯曲线变化;在0.075 MPa时其失重量达到峰值1.86 g;流体压强越小水中空泡含量越高,空泡越多其溃灭破坏强度越大;但是水中空泡增加时会增大水的可压缩性,从而对空泡溃灭冲击起到缓冲作用,反而使交互磨损破坏作用减弱.数值分析结果和实验结果吻合较好.
수치분석압강대삼상류장중40Cr 시건충식여공식교호마손적영향;시험연구불동압강하교호마손과정중40Cr시건적실중량、공포적밀도급분포적변화규률,분석압강대40Cr시건적작용궤제.결과표명:특정공황하,40Cr시건교호마손실중량수압강적증대정고사곡선변화;재0.075 MPa시기실중량체도봉치1.86 g;류체압강월소수중공포함량월고,공포월다기궤멸파배강도월대;단시수중공포증가시회증대수적가압축성,종이대공포궤멸충격기도완충작용,반이사교호마손파배작용감약.수치분석결과화실험결과문합교호.
@@@@The effect of pressure on interactive erosion and cavitation wear of 40Cr specimen was numerical analyzed in three-phase flow field. The changing rule of the weight loss,vacuoles density and distribution was experimentally studied in different pressure during the process of interactive wear,and the mechanism of pressure on 40Cr specimen was ana-lyzed. The results show that the interactive wear weight loss of 40Cr specimen changes with Gaussian curve as the pressure increasing under the special working condition,and it reaches a maximum of 1. 86 g at 0. 075 MPa. The smaller of the flu-id pressure,the higher the content of vacuoles in water,and thus the destructive strength is increased;but as the higher content of the vacuoles in water will increase the compressibility of water,thereby the cushioning effect is added on the wa-ter bubble collapse impact,and the interaction wear damage is weakened. Results of numerical analysis are found to be very close to the experimental results.