Non-ideal compressible-fluid effects in oblique shock waves

1st International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power

物理学;力学

Gori, G.^1 ; Vimercati, D.^1 ; Guardone, A.^1

Department of Aerospace Science and Technology, Politecnico di Milano, Via La Masa 34, Milan

20156, Italy^1

关键词: Adiabatic transformation;    Close proximity;    Compressible fluids;    Liquid-vapour;    Molecular complexity;    Oblique shock waves;    Saturation curve;    Van der waals models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/821/1/012003/pdf
DOI  :  10.1088/1742-6596/821/1/012003

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The non-monotone dependence of the speed of sound along adiabatic transformations is demonstrated to result in the admissibility of non-ideal increase of the flow Mach number across oblique shock waves, for pre-shock states in close proximity of the liquid-vapour saturation curve. This non-ideal behaviour is primarily associated with a less-than-unity value of the fundamental derivative of gasdynamics and, therefore, non-ideal shock waves are expected to be observed in flows of fluids with moderate molecular complexity. The simple yet qualitatively sound van der Waals model is used to confirm the present findings and to provide exemplary non-ideal shock waves.