水蒸汽非灰辐射光谱吸收系数

Non-gray Radiative Spectral Absorption Coefficient of Water Vapor

辐射显著影响燃烧的化学动力学和火焰结构。火焰燃烧辐射传输问题的计算 ,需要考虑气体辐射的非灰特性。辐射传输方程微分方法的近似解通常以吸收系数为基本参数。基于此 ,研究了总压 0 .1MPa,分压 0 .0～ 0 .1MPa,压力行程 0 .0 1～ 1.0 MPa· m,温度 30 0～ 2 5 0 0 K水蒸汽的光谱辐射特性。由 Edwards指数宽波带模型进一步简化 ,得到了计算水蒸汽各个谱带辐射特性参数 ,包括谱带光谱吸收系数 ,谱带上。

Thermal radiation has a remarkable influence on chemical dynamics of combustion and structure of flame since it affects directly on temperature. The non-gray property of gas radiation must be considered when the radiation energy transport of flame combustion is calculated. In approximate calculation of radiation transport differential equation absorption coefficient is a fundamental parameter. Based on this, when the total pressure is 0.1 MPa, spectral radiative properties of water vapor are investigated in a gas temperature range of 300 K-2500 K, a pressure path length range of 0.01-1.0 MPa&middotm and partial pressure range of 0.0-0.1 MPa. By simplifying the Edwards exponential wide-band model, spectral parameters of bands radiative properties (including band spectral absorption coefficient, upper and lower band limits) are obtained.