TY - JOUR

T1 - Hysteresis of oscillatory airflow in a supersonic intake model

AU - Кузьмин, Александр Григорьевич

PY - 2024/1/13

Y1 - 2024/1/13

N2 - Supersonic airflow deceleration in a conventional mixed-compression intake is studied numerically. The simulation of turbulent two-dimensional flow is based on the Reynolds-averaged Navier–Stokes equations and the k-ω SST turbulence model. Numerical solutions are obtained with ANSYS-18.2 CFX finite-volume solver of second-order accuracy. The solutions reveal flow hysteresis with step-by-step changes in the free-stream Mach number M ∞. The hysteresis is caused by the instability of an interaction of a shock wave with the local region of flow acceleration formed near the throat of intake. Oscillations of the Mach number M ∞ in time are considered as well, and the existence of hysteresis is confirmed at small values of the amplitude A and period τ of the oscillations. The hysteresis shrinks with increasing amplitude A and eventually disappears at sufficiently large amplitudes. The dependence of shock wave oscillations on the period τ is also studied and transitions between different flow regimes are discussed.

AB - Supersonic airflow deceleration in a conventional mixed-compression intake is studied numerically. The simulation of turbulent two-dimensional flow is based on the Reynolds-averaged Navier–Stokes equations and the k-ω SST turbulence model. Numerical solutions are obtained with ANSYS-18.2 CFX finite-volume solver of second-order accuracy. The solutions reveal flow hysteresis with step-by-step changes in the free-stream Mach number M ∞. The hysteresis is caused by the instability of an interaction of a shock wave with the local region of flow acceleration formed near the throat of intake. Oscillations of the Mach number M ∞ in time are considered as well, and the existence of hysteresis is confirmed at small values of the amplitude A and period τ of the oscillations. The hysteresis shrinks with increasing amplitude A and eventually disappears at sufficiently large amplitudes. The dependence of shock wave oscillations on the period τ is also studied and transitions between different flow regimes are discussed.

KW - Hysteresis

KW - Numerical simulation

KW - Oscillations

KW - Shock waves

KW - Turbulent flow

UR - https://link.springer.com/article/10.1007/s42401-023-00268-9

UR - https://www.mendeley.com/catalogue/d38efc4a-43a3-31fd-92b9-4c674854175a/

U2 - 10.1007/s42401-023-00268-9

DO - 10.1007/s42401-023-00268-9

M3 - Article

VL - 7

SP - 629

EP - 633

JO - Aerospace Systems

JF - Aerospace Systems

SN - 2523-3955

IS - 3

ER -