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自激振荡腔室是产生自激振荡脉冲射流的重要条件 ,振荡腔室的结构参数、流体流动参数、有效反馈条件及流场特性直接影响脉冲射流的瞬时冲击力。文章在理论与实验研究的基础上 ,采用标准的K -ε模型 ,应用有限元软件ANSYS进行了腔室内三维流场的数值模拟 ,并根据结果作出了流场速度分布图及压力与各影响因素的关系图。模拟结果与室内台架实验对比表明 ,数值模拟能很好的反映流场的分布及腔室压力与各影响因素之间的关系 ,对进一步研究有指导意义。
Self-excited oscillation chamber is an important condition to generate self-excited oscillating pulse jet. The structural parameters of oscillating chamber, fluid flow parameters, effective feedback conditions and flow field characteristics directly affect the instantaneous impact of pulse jet. Based on the theoretical and experimental studies, the numerical simulation of the three-dimensional flow field in the chamber is performed by using the standard K-ε model and the finite element software ANSYS. Based on the results, the flow field velocity distribution and the relationship between pressure and various influencing factors The diagram. The simulation results and laboratory bench tests show that numerical simulation can well reflect the distribution of flow field and the relationship between chamber pressure and various influencing factors, which is instructive for further research.