【摘要】 为探究微波加热钢渣沥青混凝土的传热机理和影响因素，采用数值仿真模拟和室内试验相结合的方法开展研究。根据麦克斯韦方程和傅里叶方程构建多物理场下微波加热钢渣沥青混凝土仿真模型，揭示材料介电常数、微波频率及波导结构对普通沥青混凝土(WS)和3种钢渣沥青混凝土(CSFSS、CSSFS、WSS)传热特性的影响规律；通过室内微波加热钢渣沥青混凝土温度分布试验，验证了仿真模型的可靠性。结果表明：1)多物理场下微波加热钢渣沥青混凝土模型的区域最高温度、升温效率、体平均温度、能量效率、温度协同常数呈现一致的变化规律，即WSS>CSFSS>CSSFS>WS;材料介电常数越大，升温速率越快，但温度均匀性较差；相较微波频率2.45 GHz, 5.8 GHz作用下钢渣沥青混凝土的升温速率增长介于9%～15%;微波频率越大，钢渣沥青混凝土升温速率越快；相较单波导结构，双波导结构作用下钢渣沥青混凝土的温度均匀性明显提升；2)微波加热钢渣沥青混凝土的温度实测值和模拟值均与加热时间具有较好的线性关系，且模拟值和实测值相近，说明仿真模型有效、可靠。更多还原

【Abstract】 In order to explore the heat transfer mechanism and influencing factors of microwave heating steel slag asphalt concrete(SSAC), a combination of numerical simulation and indoor experiments was used to conduct research. A simulation model of microwave heating SSAC under multiple physical fields based on Maxwell equation and Fourier equation was created, revealing the effects of material dielectric constant, microwave frequency, and waveguide structure on the heat transfer characteristics of ordinary asphalt concrete(WS) and three types of SSAC(CSFSS, CSSFS, WSS).The reliability of the simulation model was verified through indoor microwave heating of SSAC temperature distribution experiments. The results indicate that the highest temperature, heating efficiency, average temperature, energy efficiency, and temperature synergy constant of microwave heating SSAC model under multiple physical fields exhibit consistent changes, namely WSS>CSFSS>CSSFS>WS. The larger the dielectric constant of the material, the faster the heating rate, but the temperature uniformity is poor. Compared to the microwave frequency of 2.45 GHz, the heating rate of SSAC increases by 9%-16% at 5.8 GHz. The higher the microwave frequency, the faster the heating rate of SSAC. Compared to the single waveguide structure, the temperature uniformity of SSAC is significantly improved under the action of the double waveguide structure. The temperature measured and simulated values of microwave heating SSAC have a good linear relationship with heating time, and the simulated values are close to the measured values, indicating that the simulation model is effective and reliable.更多还原