摘要
采用计算流体力学方法对超音速火焰喷涂过程进行数值模拟，研究了扩展角的变化对燃烧场的影响。研究发现扩展角对马赫锥形成的位置具有影响，随着扩展角的变化，马赫锥产生的位置向燃烧室方向偏移，当扩展角为0°～3．0°时，最大马赫数随扩展角度增大而增大。研究了扩展角对Diamond—Jet喷枪的温度场影响，当扩展角为0°～1．0°时，温度随扩展角的增加而降低，燃烧能转化为气体的动能；但是当扩展角度继续增加时，温度不再降低。
Numerical simulation of flow field of high velocity oxygen-fuel thermal spray process of Diamond-Jet is presented by studying the influence of divergent angle on combustion flow field with CFD. It is shown from the results that the site of appearance of Maeh cone is controlled by the divergent angle, and the site will deviate towards the combustor with the angle increasing. When the angle is within 0°- 3.0°, the magnitude of Mach number increases with the angle increasing. The divergent angle affects the temperature within the Diamond-Jet. When the angle is within 0°- 1.0°, the temperature decreases with the angle increasing, which means energy transfer from combustion energy to kinematic energy. But with the continual increase of the divergent angle, the temperature decreases no longer. These maybe present some clue for the design of Diamond-Jet spary.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第4期499-503,共5页
Journal of East China University of Science and Technology
