基于Fluent的热声异形谐振管压比研究

Pressure ratio investigation on thermoacoustic resonator based on fluent

通过采用Fluent模拟计算的方法研究了在相同输入的情况下,不同谐振管形状对系统压比的影响。为了验证采用Fluent的可行性和作者编制程序的准确性,对刚性封闭直管,容性封闭直管进行了模拟,其结果与理论分析相吻合;对一实验系统进行模拟,模拟时以其中任意两个测点测量值为输入输出,将所得声场其它观察点的模拟结果与实验测量值相比较,二者符合也很好,证明了本研究方法是可行的,程序编制是正确的。在此基础之上,对不同管形结构的空谐振管进行了模拟计算,得到了不同情况下的最大输出压力,结果认为在提高压比方面渐变管优于突变管及锥形管优于直管。

The effects on pressure ratio of different shape resonators under the same input conditions were studied with Fluent6. 0. The pressure distribution along the straight resonator which terminated in a rigid wall and a large spherical volume was calculated respectively. The results agreed well with the theoretic analysis. An experimental system was simulated by using two measured values as the input and output values. The results agreed well with other measured values, It indicates that the method is feasible and the programs are correct. Base on this, the pressure distribution of different structural tubes was calculated. It concludes that the reducer is better than the expander and the taper reducer terminated in large spherical volume is better than the straight tahe in rigid wall.