论文部分内容阅读
现有的相似参数能够较好地解决无源流动的动力学相似和热力学相似问题。然而,如果流场中存在质量、动量和能量等源项,则须引入新的相似参数来指导实验的设计。首先,在连续介质假设、斯托克斯流体假设、量热完全气体假设和单相流假设的前提下,推导出了41个相似参数;然后,将之归纳整理成9个独立的相似参数,其中,3个与源项有关;最后,讨论了它们各自的物理意义。现有的单相流相似参数均可通过9个相似参数组合而来。实际应用中,可根据具体流动情况选择这9个相似参数中的某几个进行模拟。
The existing similar parameters can well solve the dynamic similarity and thermodynamic similarity of passive flow. However, if there are sources such as mass, momentum and energy in the flow field, new similar parameters should be introduced to guide the design of the experiment. Firstly, 41 similar parameters were deduced on the premise of continuum assumption, Stokes fluid assumption, calorimetric complete gas hypothesis and single-phase flow hypothesis. Then, we summarized them into nine independent similar parameters, Among them, 3 are related to source items; finally, their respective physical meanings are discussed. The existing single-phase flow similar parameters can be combined by 9 similar parameters. In practice, some of these nine similar parameters may be selected for simulation according to the specific flow conditions.