The construction and operation of high-speed rail（HSR）grid within the past two decades in China,in terms of the scale,may be possibly comparable to any national-wide construction in the history of China,even the Gre...The construction and operation of high-speed rail（HSR）grid within the past two decades in China,in terms of the scale,may be possibly comparable to any national-wide construction in the history of China,even the Great Wall.By counting railways with commercial train service at the speed of200 km/h,China has the world’s longest HSR network with over 19 369.8 km of track in service today and this number展开更多
Recent activities on cavitation research in the Institute of High Speed Mechanics,Tohoku University,Japan are reviewed.Firstly,our recent research project on cavitation occurrence in various liquids other than water i...Recent activities on cavitation research in the Institute of High Speed Mechanics,Tohoku University,Japan are reviewed.Firstly,our recent research project on cavitation occurrence in various liquids other than water is explained in relation to the thermodynamic and gas content effects.Secondly,study on cavitation damage is introduced.In this field,the mechanism of a single bubble collapse near solid wall and the related pit formation in soft test materials have been investigated.Also,the effects of fluid properties on the cavitation damage are clarified.Finally,a special study on shock wave propagating through gas- liquid two-phase magnetic fluid is explained to extend further developments of cavitation research.展开更多
文摘The construction and operation of high-speed rail（HSR）grid within the past two decades in China,in terms of the scale,may be possibly comparable to any national-wide construction in the history of China,even the Great Wall.By counting railways with commercial train service at the speed of200 km/h,China has the world’s longest HSR network with over 19 369.8 km of track in service today and this number
文摘Recent activities on cavitation research in the Institute of High Speed Mechanics,Tohoku University,Japan are reviewed.Firstly,our recent research project on cavitation occurrence in various liquids other than water is explained in relation to the thermodynamic and gas content effects.Secondly,study on cavitation damage is introduced.In this field,the mechanism of a single bubble collapse near solid wall and the related pit formation in soft test materials have been investigated.Also,the effects of fluid properties on the cavitation damage are clarified.Finally,a special study on shock wave propagating through gas- liquid two-phase magnetic fluid is explained to extend further developments of cavitation research.
