Choking of parallel compressible streams with shear and wall friction
(2024) ICTAM 2024: 26th International Conference of Theoretical and Applied Mechanics — Location: Daegu, South Korea (25.August.2024)
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- Authors
Mendez, Miguel Alfonso 
- Abstract
- We present the extension of a 1D framework for parallel compressible streams, also known as compound flows. According to the original isentropic theory, a choked compound flow is sonic in the throat. However, it has recently been observed that the sonic section can move up- and downstream. In this work, we show analytically and numerically that shear and wall friction are the responsible physical mechanisms. The resulting framework accurately captures choking, but also provides the dividing streamline and the axial evolution of relevant flow variables such as the Mach number and the static pressure. Moreover, these predictions have a minor computational cost, offering an excellent compromise between accuracy and costs compared to 0D models and 2D or 3D simulations. We therefore believe that the extended framework opens perspectives in modelling of applications with compound flows, such as ejectors.
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Citations
Van den Berghe, J., Bartosiewicz, Y., & Mendez, M. A. (2024). Choking of parallel compressible streams with shear and wall friction. ICTAM 2024: 26th International Conference of Theoretical and Applied Mechanics, Daegu, South Korea. https://hdl.handle.net/2078.5/269588