RT Journal Article
T1 Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet
A1 Granados-Ortiz, Francisco-Javier
A1 Airiau, Christopher
A1 Ortega-Casanova, Joaquín
K1 Mecánica de fluidos
AB It is acknowledged by mechanical and aeronautical engineers that many important industrial fluid mechanics simulation-based decisions are made by analysing Reynolds-Averaged Navier-Stokes (RANS) simulations. However, despite that the use of RANS simulations has become a necessity, still unrealistic conditions such as not considering experimental variability or blindly trust a turbulence model happens in practice. This is an important concern in simulation of high-speed jet flows, as the reliability and the accuracy of RANS is still an issue. In this work non-intrusive Uncertainty Quantification (UQ) has been applied to the linear stability analysis of 3D RANS simulations of an under-expanded supersonic jet under uncertainty. The Parabolized Stability Equations (PSE) are utilised for the first time in the literature in a probabilistic approach for the propagation of uncertainty upon CFD simulations. As PSE does not include turbulence nor stagnation pressure as parameters in their mathematical formulation (named non-intrinsic parameters in this work), this framework enables a recommended practice to quantify the impact of uncertainty from earlier stages on the latter jet instability analysis.
PB Elsevier
YR 2021
FD 2021-10-12
LK https://hdl.handle.net/10630/37400
UL https://hdl.handle.net/10630/37400
LA eng
NO F.-J. Granados-Ortiz, C. Airiau, J. Ortega-Casanova, Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet, International Journal of Mechanical Sciences, Volume 213, 2022, 106847, ISSN 0020-7403, https://doi.org/10.1016/j.ijmecsci.2021.106847. (https://www.sciencedirect.com/science/article/pii/S0020740321005695)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026