二阶非线性热声理论模型研究

Investigation on second-order nonlinear thermoacoustic theory model

基于流体力学基本原理建立了热声系统的二维二阶理论模型,分析了由于系统中二阶物理量的存在所引发的非线性效应,讨论了热声系统中几个物理量由于非线性效应所带来的变化。最后,通过对该理论模型中流场方程的封闭性研究,简单分析了进行数值模拟计算的可行性。

In this paper, a two-dimension second-order thermoacoustic theory model is built based on the universal principle of hydrodynamics. Then based on the model, the nonlinear effect which the presence of second-order physical parameters in thermoacoustic system brings otrt is analyzed, and the change of some interested physical parameters due to the nonlinear effect is discussed at the same time. At last, the feasibility of the numerical simulation computing about this model is analyzed simply through investigating if the flow-field equations in this model are closed.