自激振荡脉冲射流机理探讨

Mechanistic Research on Self-excited Oscillating Impulse Jet Flow

回顾了在自激振荡脉冲射流的研究概况，在此基础上应用流体网络理论中含负阻元件的电子线路，简化自激振荡脉冲射流（简称自振脉冲）的物理模型，在比拟的基础上建立数学模型。在讨论非线性方程解的过程中，采用现代自组织的有关理论分析了脉冲射流的形成机理。由于系统本身的复杂性和模拟的近似性，要了解在什么条件下才能形成稳定的耗散结构和稳定频率，可能要在线性比拟前提下采用更为复杂的比拟电路，更多地依赖于完善的实验研究。在实验研究和分析中要特别注意自激振荡的非线性特征，这与以往的研究有明显的区别。

Firstly a brief review of previous researches on self-excited oscillating impulse jet flow (SEOIJF) is presented in the paper. Based on this and according to the theory of fluid network, we simplify the physical model of self-excited oscillating impulse jet flow by applying the principle of electric circuit with load resistance. Based on analog, we build the mathematical model. In discussing the solution of nonlinear equations, we analyze the formative mechanism of impulse jet flow by using the theory of modern self-organization.Because of the system's complexity and the simulation's approximation, if one wants to know under which conditions stable dissipation structure and stable frequency can be formed, one may need to employ more complex analogy circuit with nonlinear analog and have more dependence on detailed experimental studies.