Velocity profile of transient flow in a convergent-divergent nozzle of reflected shock tunnel

This research displays a 2-D time-accurate Navier-Stokes solver for shock tunnel applications. Fourth-order accurate Runge-Kutta temporal integration and second-order accurate finite volume spatial discretization are used by the solver. Its goal is to simulate the transient flow process in a reflect...

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Bibliographic Details
Main Authors: Ahmed, Diyar I., Dawood, H. K., Yusoff, M. Z., Al-Falahi, Amir
Format: Conference Proceeding
Language:English
Subjects:
Convergent-divergent nozzles
Flow characteristics
Gas mixtures
Pressure ratio
Runge-Kutta method
Shock tunnels
Shock wave reflection
Solvers
Unsteady flow
Velocity distribution
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Summary:This research displays a 2-D time-accurate Navier-Stokes solver for shock tunnel applications. Fourth-order accurate Runge-Kutta temporal integration and second-order accurate finite volume spatial discretization are used by the solver. Its goal is to simulate the transient flow process in a reflected shock tunnel by utilizing various driver/driven gas mixtures. An investigation of the entire facility’s flow characteristics was conducted, with a special focus on the nozzle portion’s speed profile. The flow inside the nozzle part was found to be steady and uniform for a few milliseconds. The findings indicate that the pressure ratio between the driving and propelling parts is not as critical as previously thought, but the shock wave’s location along the ability has a significant impact on its speed. Shock-reflected shock waves make the flow not uniform, which fits with what we know from modeling.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0198218