脉动燃烧器内流场的数值模拟

Numerical Simulation of Self-oscillated Flows in Tubes

建立了 Rijke型脉动燃烧器内自激脉动流动的数学模型 ,并采用 TVD格式求解了二维非稳态可压流 N- S方程 ,讨论了加热量对脉动流动及对流传热过程的影响。认为速度脉动幅度对对流传热系数的影响比较大 ,在脉动速度分量波动较大的地方 ,对流传热系数增加的幅度加大。证明了在

A numerical model is proposed for self oscillated flows in Rijke type pulsating combustors.TVD schemes are utilized to solve the two dimensional unsteady N S equations of compressible flows.The effects of the energy release on pulsating flows and heat transfer processes are considered.Amplitudes of pulsating velocities have been found to play an important role in convective heat transfer enhancement,which is improved owing to larger amplitudes of the pulsating velocities.The results suggest that self oscillated flows in Rijke type combustors enhance the convective heat transfer rates.