气流谐振发电机的计算流体动力学仿真方法

摘要

气流谐振发电机作为一种引信电源在国外已经应用于多种型号引信,而在我国现有的实验方法和设备不能满足对气流谐振发电机进一步研究的要求.针对此问题,将计算流体动力学(CFD)方法引入气流谐振发电机分析.该方法与一般计算流体动力学仿真的不同点是:采用结构化网格,假设膜片在气流谐振发电机工作过程中始终是静止的,并对模型进行了简化处理,定义了时间步长.采用此方法对不同入口压力条件下气流谐振发电机的工作状况进行的仿真与理论分析和实验结果相吻合,而且本方法可以对局部和总体的不同时间的流场进行细致描述,这是实验方法不能实现的.%As a kind of fuze power,air driven fluidic resonance generator has been used in many fuzes aboard. The existing experimental method and facility can not satisfy the requirements of further research in air driven fluidic resonance generator. Aiming at this situation,a CFD method was introduced to the analysis of air driven fluidic resonance generator. This method used a structure mesh, which assumed that the diaphragm was always stable during the working process of air driven fluidic resonance generator, and the time step was delinked. By using this method, the simulation result showed that the performance of air driven fluidic resonance generator in different inlet pressure accorded with theoretical analysis and experiment result Further more, partial and general fluid field could be described in detail by this method, which could not be completed by experimental method.