高压除鳞喷嘴内部流场数值模拟与仿真分析

针对目前工厂广泛使用的高压除鳞喷嘴，应用前处理软件Gambit建立其内部流场的三维模型，采用Fluent软件提供的Laminar层流模型对不同结构参数的喷嘴内部不可压缩、稳态、层流流场进行了数值模拟，并分析了各参数对其流场速度分布、压力分布和出口轴心速度的影响。仿真值与理论计算值十分接近，数值模拟结果表明，喷嘴收缩角和直径对其内部流场影响较大，而扩张角对其内部流场影响相对较小，但各参数都存在最优值，且各参数之间也存在着最优搭配使射流打击效果最好。

Numerical simulation and analysis of internal flow field in high-pressure descaling nozzle

In light of the wide use of the high-pressure descaling nozzle in factories, a three-dimensional mathematical model for the internal flow field in the nozzle was established by the Gambit software. Using the Laminar model offered by Fluent software to simulate the incompressible, steady state internal flow field of the nozzle with different constructional parameters, the influence of nozzle parameters on the velocity distribution, pressure distribution and outlet axial velocity of the flow field is analyzed. The simulation results, being very close to the theoretical value, show that the astringent angle and diameter of the nozzle affect the internal flow field significantly while the effect of the diffuse angle is relatively modest. All the parameters have optimum values, and there exists an optimum match among the parameters for the best impact effect of water jet.