摘要
本文详细给出了物体在对流换热环境下的非稳态导热适用集总参数法的条件．论述了目前各种集总参数法适用判据的局限性．在此基础上，作者提出了以物体内部最大温差与物体和环境最大温差之比小于某一常数作为适用集总参数法的判据．并分析了凡数与Ｂｉ数对该判据的影响．
he applicability of Lumped Heat Capacity Method(LHCM)for a body with a heat convection boundary condition is investigated. The limitation of some widely using criteria for applicability of LHCM is given and one new criterion based<ε is suggested by authors.The effect of Bi or Fo number on this new criterion s discussed.
