研究了大气压下交流电弧等离子体温度场与入射颗粒的相互作用．在等离子体连续方程、能量方程中增加一项由颗粒直径及能焓变化引起的源项，对方程组进行无量纲化以及对弧柱边界进行迭代解决了交流电弧等离子体的动边界问题．计算了不同的颗粒入射量、颗粒半径、交流频率、初始弧柱半径和有无对流等五种情况．通过对铝颗粒和氩等离子体的计算表明：颗粒和交流电弧等离子体的相互作用对颗粒的加热历程和等离子体温度场都有重要影响．研究结果适用于交流频率范围１０—１００Ｈｚ．这个范围包括了大多数工业用交流电弧的频率 The interaction between temperature field of AC arc plasma and incident particles under atmospheric pressure was studied. In the plasma continuum equation and energy equation, a source term caused by the change of particle diameter and energy enthalpy is added. The dimensionless equations are solved and the boundary of the arc column is iterated to solve the moving boundary problem of AC arc plasma. Five different conditions of particle incident, particle radius, AC frequency, initial arc radius and convection were calculated. Calculations of aluminum particles and argon plasma show that the interaction between the particles and the AC arc plasma has an important influence on the heating process of the particles and the temperature field of the plasma. The results are valid for the AC frequency range of 10-100 Hz. This range includes the frequency of most industrial AC arcs