基于DeltaE程序的双段惯性管相位特性研究

Study on phase-shifting ability of dual-segment inertance tubes based on DeltaE

对双段惯性管的相位特性进行了系统的研究,通过实验验证DeltaE模拟准确性,进而对双段惯性管结构尺寸及运行参数进行模拟计算。结果表明,运行参数一定时,第二段惯性管尺寸变化对入口相位角影响较大,惯性管入口声功随着管长减小以及内径的增大而增大;结构尺寸一定时,入口相位角随充气压力以及频率增大而增大。声功随频率减小而增大,受充气压力及管长共同影响。

The studies on phase characteristics of the dual-segment inertance tubes were carried out systematically. The simulation model of DeltaE was verified by experiments. According to this model,simulations based on operating and structure parameters were performed. The simulations results show that the structure parameters of the second segment inertance tube have significant influence on the inlet phase degrees under the same operating parameters. The inlet acoustic power of the inertance tube increases as the length decreasing and the radius increasing. With same operating parameters,the phase degrees of inlet increases as the mean pressure and frequency increasing. The acoustic power increases as the frequency decreasing,being influenced by both mean pressure and the length.