论文部分内容阅读
为揭示不同接触面厚度煤岩体内热量传递情况,采用理论分析和数值计算方法,推导了多孔介质内连续性方程、动量方程和能量方程新的表达形式,分析了接触面厚度不同对煤岩体传热影响.计算结果表明:接触面厚度为2 mm和5 mm的煤岩体高温壁面下部导热作用最强;接触面厚度为3 mm和4 mm的煤岩体低温壁面上部导热作用最强;接触面厚度为2 mm和5 mm的煤岩体高温壁面中下部自然对流强;煤岩体壁面附近自然对流强,中央区域自然对流弱;煤岩体高低温壁面附近导热占主导;接触面厚度为2 mm和5 mm煤岩体热量传递情况相同,3mm和4mm煤岩体热量传递情况相同.
In order to reveal the heat transfer in coal and rock with different contact surface thicknesses, a new expression of continuity, momentum and energy equations in porous media was deduced by theoretical analysis and numerical calculation. The results show that the thermal conductivity of the lower part of the high temperature wall of the coal and rock mass with the contact surface thicknesses of 2 mm and 5 mm is the strongest; the thermal conductivity of the upper part of the low temperature wall surface of the coal and rock mass with the contact surface thickness of 3 mm and 4 mm is strongest ; The natural convection is strong in the middle and lower parts of the high temperature wall of the coal and rock body with the contact surface thicknesses of 2 mm and 5 mm; the natural convection near the coal wall and the natural convection in the central area is weak; the heat conduction around the high and low temperature wall of the coal and rock body is dominant; The heat transfer of the 2 mm and 5 mm coal and rock bodies is the same, and the heat transfer of the 3 mm and 4 mm coal rock bodies is the same.