摘要
对环形进出口旋流燃烧室内有较强回流的湍流旋流流动进行了数值模拟。计算中分别采用了完整形式与简化形式的新的代数 Reynolds应力模型及 k-ε模型。模拟结果与实验测量数据在气体轴向与切向时均速度和轴向、切向与径向湍流脉动速度均方根值分布上的对比表明 ,新的代数应力模型可预报出旋流燃烧室内范围较大的中心回流区 ,气体切向速度分布的 Rankine涡结构 ,以及湍流脉动的各向异性。
A numerical simulation of the recirculating swirling turbulent flow in a swirl combustor with an annular inlet and exit was conducted.A new algebraic Reynolds stress model,both in its full form and in a simplified explicit form,and the k ε model were employed in the simulations for the closure of turbulence.The calculated results were compared with the measured test data in terms of the gas axial and tangential velocities,and the three components of the gas turbulent fluctuating velocity.It is shown that the new algebraic Reynolds stress model can properly predict the large central recirculation zones in the combustor,the Rankine vortex profiles of the gas tangential velocity,and the nonisotropic features of the gas turbulence.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2002年第1期84-88,共5页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目 (5980 60 0 6)
