摘要
跨音速流动中的非平衡凝结导致潜热的释放和液滴的自发凝结过程。通过将N-S方程与凝结控制方程耦合求解的方法,在不同落压比不同初始相对饱和度条件下,对收扩喷管中的凝结流动进行了数值模拟。结果表明：在收扩喷管的高速膨胀流动中,冷却速率越大,成核率越高。凝结潜热的释放使流场的总温升高,流量减少,音速线后移。
The non-equilibrium condensation in transonic nozzle flows results in latent heat releasing to the flow and the spontaneous generation of liquid droplet.The condensing convergent-divergent nozzle flow is numerical simulated by coupling solving the N-S equation and condensate mass equation at different nozzle pressure ratios（NPR） and initial supersaturation.The results show that,in a supersonic expansion convergent-divergent nozzle flow,high cooling rate results in a high value of nucleation rate.The nozzle flow is affected by the latent heat released,the total temperature increases,mass flow rate decreases,and the sonic line moves backward.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第8期1299-1302,共4页
Journal of Engineering Thermophysics
关键词
非平衡凝结
成核率
冷却速率
相对饱和度
non-equilibrium condensation
nucleation rate
cooling rate
supersaturation
