The additirn of three kins ZrO2-bearing additives into MgO-MA refractory could all increase the latter's C.C.S.and the thermal shock resistance,XRD,polarizing microscope and electron probe analysis were used to an...The additirn of three kins ZrO2-bearing additives into MgO-MA refractory could all increase the latter's C.C.S.and the thermal shock resistance,XRD,polarizing microscope and electron probe analysis were used to analyze the mechanism to improve the thermal shock resistance of the material.The mechanism is that ZrO added into the material improves the microstructure,introduces asppropriate micro cracks into matrix ,enhances the matrix,and therefore increases the thermal shock resistance of ther refractory.展开更多
Effect of velocity jump and temperature jump on the heat and momentum transfer in micro-domains is discussed in detail. A simulation aided by locally fully developed assumption is developed to ex-plain the experimenta...Effect of velocity jump and temperature jump on the heat and momentum transfer in micro-domains is discussed in detail. A simulation aided by locally fully developed assumption is developed to ex-plain the experimental results different from those predicted by conventional theory. Heat transfer in microrchannels under the uniform heat flux is also analyzed. It is found that velocity-jump and temperature-jump have an opposite innuence and Nusselt number has a greater ralue when the Knud-sen number is very small. With the increasing of Knudsen Number, Nusselt number became smaller than 8.24.展开更多
文摘The additirn of three kins ZrO2-bearing additives into MgO-MA refractory could all increase the latter's C.C.S.and the thermal shock resistance,XRD,polarizing microscope and electron probe analysis were used to analyze the mechanism to improve the thermal shock resistance of the material.The mechanism is that ZrO added into the material improves the microstructure,introduces asppropriate micro cracks into matrix ,enhances the matrix,and therefore increases the thermal shock resistance of ther refractory.
文摘Effect of velocity jump and temperature jump on the heat and momentum transfer in micro-domains is discussed in detail. A simulation aided by locally fully developed assumption is developed to ex-plain the experimental results different from those predicted by conventional theory. Heat transfer in microrchannels under the uniform heat flux is also analyzed. It is found that velocity-jump and temperature-jump have an opposite innuence and Nusselt number has a greater ralue when the Knud-sen number is very small. With the increasing of Knudsen Number, Nusselt number became smaller than 8.24.
