A study of directional heating based on High-power Radiator Array
In response to the problems of low efficiency,high energy consumption,and severe tool wear in traditional rock mining technology in current engineering applications,a novel approach based on microwave near-field focusing theory is proposed to heat the designated area inside the rock.The heat en-ergy converted from microwave energy is used to generate stress and form cracks inside the rock,so as to ease the further explore mining.Based on the basic structure of horn antennas and the design principle of matching layers,a high-power 4×4 radiator array is designed to achieve directional heating by adjusting the input phase value of each radiation unit.Considering four cases with heating medium depth of 400mm,500 mm,and 500 mm offset to the left and right by 100 mm respectively,and the COMSOL software is used for multi-physics field coupling calculation.The simulation results show that at a working frequency of 2.45 GHz,the corresponding phase value of each unit input can enable the beam to focus at the specified position,the focal spot area can be controlled within 210 cm2-235 cm2,and the temperature rise at the center of the focal spot is 106.85 K,99.2 K,98.6 K,and 100.56 K,respectively.The research verifies that a multi-unit radiation array enables highly accurate directional heating.
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维普
