What is it about?
Forced shock-wave oscillation is a boring problem in the internal transonic flow of an engine, e.g., the supersonic intake, which leads to the aerodynamic performance fluctuation, the excitation loads on the structures. It is driven by the downstream excitation from the unsteady combustion, and cannot be cleared from an engine. We propose a new method for mitigating the shock-wave oscillation amplitude.
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Why is it important?
Generally, the vibration of a flexible wall is avoided by the engineers. But we find that the flexible wall serves as a limiter for the forced shock-wave oscillation when the fluid-structure interaction occurs. So a novel method using fluid-structure interaction is proposed for controlling the forced shock-wave oscillation in a supersonic intake. It really does the good job by limiting the amplitude to the half of the baseline result.
Perspectives
I hope this article provides a new way for stabilizing the unsteady flow in the internal transonic flow problems, e.g., the forced shock train oscillation in a scramjet engine, the forced normal shock-wave motion in a transonic turbine cascade or a transonic airfoil.
Cheng Yao
Hefei University of Technology
Read the Original
This page is a summary of: Forced Shock Oscillation Control in Supersonic Intake Using Fluid–Structure Interaction, AIAA Journal, June 2017, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.j055627.
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