Computational verification of acoustic damping in high-enthalpy environments

Ross Wagnild; Graham V. Candler

doi:10.2514/1.J052802

Computational verification of acoustic damping in high-enthalpy environments

Ross Wagnild, Graham V. Candler

Aerospace Engineering and Mechanics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The motivation for studying acoustic propagation in high enthalpy environments lies partially in the role that acoustics play in promoting laminar-turbulent boundary-layer transition. At high speeds, boundary-layer transition on slender-body vehicles is primarily due to Mack's second-mode instability. If the growth of disturbances is sufficiently reduced, then laminar- turbulent boundary-layer transition could be delayed or prevented. In many cases, maintaining laminar flow over a high-speed vehicle is beneficial because a laminar boundary layer exerts significantly less heating and shear forces on the vehicle than a turbulent boundary layer. Accurately capturing the physics of transition would allow for a more precise prediction of the transition location. Less uncertainty in the transition location would then allow for optimization of thermal protection systems and design of high-speed vehicles. Thus, it is important to understand the interaction of an acoustic wave with a high-enthalpy flow environment.

Original language	English (US)
Pages (from-to)	2615-2618
Number of pages	4
Journal	AIAA journal
Volume	52
Issue number	11
DOIs	https://doi.org/10.2514/1.J052802
State	Published - Nov 1 2014

Bibliographical note

Funding Information:
This work was sponsored by the U.S. Air Force Office of Scientific Research (AFOSR) under grants FA9550-10-1-0563 and FA9550-10-1-0352 and by the Department of Defense National Security Science and Engineering Faculty Fellowship. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000. The views and conclusions contained herein are those of the author and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR, Sandia, or the U.S. Government.

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Copyright 2018 Elsevier B.V., All rights reserved.

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abstract = "The motivation for studying acoustic propagation in high enthalpy environments lies partially in the role that acoustics play in promoting laminar-turbulent boundary-layer transition. At high speeds, boundary-layer transition on slender-body vehicles is primarily due to Mack's second-mode instability. If the growth of disturbances is sufficiently reduced, then laminar- turbulent boundary-layer transition could be delayed or prevented. In many cases, maintaining laminar flow over a high-speed vehicle is beneficial because a laminar boundary layer exerts significantly less heating and shear forces on the vehicle than a turbulent boundary layer. Accurately capturing the physics of transition would allow for a more precise prediction of the transition location. Less uncertainty in the transition location would then allow for optimization of thermal protection systems and design of high-speed vehicles. Thus, it is important to understand the interaction of an acoustic wave with a high-enthalpy flow environment.",

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Computational verification of acoustic damping in high-enthalpy environments

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