Homogeneous gas phase reaction rate data pertaining to catalytically stabilized combustion systems at different flow velocities

The homogeneous gas phase reaction rate data pertaining to catalytically stabilized combustion systems at different flow velocities are obtained by performing numerical simulations and using fluid mechanics. A segregated solution solver with an under-relaxation method is used to solve the conservation equations. The segregated solver first solves the momentum equations, then solves the continuity equation, and updates the pressure and mass flow rate. The energy and species equations are subsequently solved and convergence is checked. The latter is monitored through both the values of the residuals of the conservation equations and the difference between subsequent iterations of the solution. The boundary conditions are defined as follows. At the inlet, a fixed, flat velocity profile is used. This boundary condition fixes the convective component of the flux of species and energy, but the diffusive component depends on the gradient of the computed temperature or species fields. Symmetry boundary conditions are applied at the centerline between the two plates. At the exit, a fixed pressure is specified and far-field conditions are imposed for the rest of the variables. At the interface between the wall and the fluid, no-slip boundary is employed. The heat flux at the fluid-wall interface is computed using Fourier's law and continuity in temperature and heat flux links the fluid and solid phases. All internal heat transfer between the fluid and the wall is calculated by accounting explicitly for the convective and conductive heat transport in the model within the fluid and within the wall. The wall thermal conductivity and exterior convective heat loss coefficient are taken as independent parameters to understand how important thermal management is. The fluid density is calculated using the ideal gas law. The fluid viscosity, specific heat, and thermal conductivity are calculated from a mass fraction weighted average of species properties, and the specific heat of chemical species is calculated using a piecewise polynomial fit of temperature. Contributor: Junjie Chen, E-mail: [e-mail], Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China

本数据集涵盖不同流速下催化稳定燃烧系统的均相气相反应速率数据，通过数值模拟结合流体力学方法获取。求解过程采用带欠松弛方法的分离式求解器对守恒方程组进行求解。该求解器先求解动量方程，随后求解连续性方程并更新压力与质量流率，之后依次求解能量与组分方程，并开展收敛性校验。收敛性通过守恒方程的残差值以及解的相邻迭代差值二者共同监测。边界条件设置如下：入口处采用固定平坦速度剖面，该边界条件固定了组分与能量通量的对流分量，而扩散分量则取决于计算得到的温度或组分场的梯度；两平板间的中心线位置应用对称边界条件；出口处指定固定压力，其余变量采用远场边界条件；壁面与流体的界面处采用无滑移边界条件。流体-壁面界面处的热通量通过傅里叶定律（Fourier's law）计算，并通过温度与热通量的连续性实现流体相与固相的连接。模型中显式考虑流体内部及壁面内部的对流与传导热传递过程，以计算流体与壁面间的全部内部换热。将壁面热导率与外部对流散热系数设为独立参数，以探究热管理的重要性。流体密度通过理想气体定律（ideal gas law）计算；流体黏度、定压比热容与热导率通过组分属性的质量分数加权平均得到；化学组分的比热容通过温度分段多项式拟合进行计算。数据集贡献者：陈俊杰，电子邮箱：[e-mail]，河南理工大学机械与动力工程学院能源与动力工程系，中国河南省焦作市世纪大道2000号，邮编454000。