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often produces low pressure area and oil reflux in the high-speed opening and closing process of the spool, causing cavitation and vortex and other phenomena. These phenomena will affect the stability... the appearance of low pressure area and oil backflow in the process of high speed opening and closing of spool. The stability of flow field and the flow rate of high speed switch valve are improved. Finally......
J. Cent. South Univ. (2016) 23: 1132-1141 DOI: 10.1007/s11771-016-0363-x Frictional characteristics of granular system under high pressure Cao Miao-yan(曹秒艳)1, Peng Ya-xin(彭雅新)2, Zhao Chang-cai(赵长财)2... forming (SGMF) technology, the frictional characteristics of the non-metallic granule medium (NGM) under high pressure were investigated by tests and simulations. And the relevant changing curves......
J. Cent. South Univ. (2017) 24: 1465-1475 DOI: 10.1007/s11771-017-3550-5 Effect of ambient wind on pressure wave generated by high-speed train entering a tunnel ZHOU Xi-sai(周细赛)1, 2, LIU Tang-hong(刘...-dimensional, unsteady N-S equations and k-ε turbulence model, the effect of ambient wind on the pressure wave generated by a high-speed train entering a tunnel was studied via numerical simulation......
with high contents of Pb, Zn, Ag, etc by oxygen pressure acid leaching was studied. It is unusual that tetrahedrite, whose treatment was rarely studied, is the primary copper mineral of the concentrates... of high and low temperature reaction kinetics and products [J]. Hydrometallurgy, 2007, 86(3/4): 191-205. [15] McDONALD R G, MUIR D M. Pressure oxidation leaching of chalcopyrite: Part II. Comparison......
J. Cent. South Univ. (2012) 19: 578-585 DOI: 10.1007/s11771-012-1042-1 Wing crack model subjected to high hydraulic pressure and far field stresses and its numerical simulation ZHAO Yan-lin(赵延林)1, 2... is found between theoretical model of wing crack proposed and finite element method (FEM). In theory, an unstable crack propagation is shown if there is high hydraulic pressure and lateral tension......
J. Cent. South Univ. Technol. (2009) 16: 0653-0657 DOI: 10.1007/s11771-009-0108-1 Estimation of compaction grouting pressure in strain softening soils YANG Xiao-li(杨小礼), ZOU Jin-feng(邹金锋...; Abstract: A new method was proposed to predict the limited compaction grouting pressure for the soft soils. Theoretical basis......
Effect of high pressure on microstructure of crystallizing amorphous Nd9Fe85B6 alloy吴尉,李慧,谢燕武,张湘义摘 要:The effect of high pressure on the microstructure of annealed amorphous Nd9Fe85B6 alloy was studied. It was found that applica- tion of high pressure made the microstructure of the crystallized alloy much more homogeneous. The average grain size......
Effect of high Pressure on the Solid-State Phase Transformation Microstructure of Cu-Zn Alloy刘建华,徐进,何淼,杨坤,张瑞军摘 要:The solid-state phase transformation microstructure of Cu-Zn alloy under different high pressure were investigated by means of SEM and XRD. The results show that the α phase with smaller grain size, different shape and random distribution......
Microstructure evolution and thermal physical properties of CuCr alloy after high pressure treatmentYu-Quan Ma,Hong-ju Lin,Dong-dongSongMechanical and Electrical Engineering College, Hebei Normal... by infiltration were measured by thermal constant tester and dilatometer before and after high pressure heat treatment, at the same time, the effect of high pressure treatment on the thermal physical......
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