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Effect of flank angle and friction coefficient on contact stress of turbine rotorWU Xiao-zan(伍晓赞), TAO Qing-bin(陶庆斌), CHEN An-ping(陈安平), XU Hui(徐慧)(1. School of Physics Science and Technology... stress appears at the chamfer below the flank, which agrees with experiment result. At the same time, the contact stress changing with the flank angle and friction coefficient was calculated......
Influence of Rare Earths on Contact Fatigue of Rail Steels ZHU Gui-lan1,MA Teng1 (1.Department of Physics, Central Iron and Steel Research Institute, Beijing 100081, China) Abstract:Rail/wheel contact fatigue of NbRE rail, Nb rail and U74 rail was investigated using contact fatigue tester. Microstructure and morphology as well as microhardness in the fatigue profiles were analyzed by scanning......
. By the measurement of contact angle, it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu2+ when dithiophosphate is used as the collector. Using sodium diethyl... flotation occurring at about 300 mV (vs SHE). Key words: flotation; pyrrhotite; pulp potential; contact angle 1 Introduction Pyrrhotite is a common sulphide mineral which has a disordered NiAs structure......
; Abstract: Electrokinetic and contact angle measurements were used to discuss the interfacial interaction on bio-leaching of pyrite mineral. Surface energy parameters of pyrite mineral and thiobacillus ferrooxidans were obtained by calculating according to formula of Young’s equation and contact angle measurements. The results show that surface energy of thiobacillus......
; (4) Figure 2 Schematic diagram of contact loads between disc cutter and rock (ω-Angular velocity of disc cutter; h-Penetration; θ-Corresponding angle of theoretical contact area) Obviously... in the drawing is the angle that the point has rotated about the axis of the disc cutter from the contact point. Thus, zero point represents the contact point. The angle value is positive when turning......
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increased from 5 to 60 μm. In order to study the effect of b on the wettability of the rough surface, the effects of apparent contact angle (CA) and sliding angle (α) of the droplet on the rough surface were measured with the contact angle meter. The results show that the experimental values of CA well agree with the classical wetting theory and α decreases with the increase of b. Two drop shapes exist......
droplets are observed later on the fin with bigger contact angle, which shows obvious resistance in condensation. The forms of the frost crystals are similar on four hydrophobic fins while the differences of frost layer height are obvious. The bigger the contact angle is, the thinner the frost layer is, and the better the anti-frosting effect is. The effects of contact angle and contact angle......