The Second Mode in High-enthalpy Boundary Layers in Chemical Non-equilibrium

Jill Klentzman; Anatoli Tumin

doi:10.1016/j.piutam.2015.03.022

The Second Mode in High-enthalpy Boundary Layers in Chemical Non-equilibrium

Jill Klentzman, Anatoli Tumin

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

Boundary layers at a zero pressure gradient in chemical non-equilibrium are considered for a five-species model of air in a total enthalpy range of 5 - 17 MJ/kg. Comparisons with boundary layers in binary mixtures of oxygen reveal that the growth rates of the second mode are lower in the case of air. This result can be attributed to the lower wall temperatures in binary mixtures of oxygen due to dissociation, with the lower wall temperatures having a destabilizing effect on the second mode similar to the case of boundary layers in calorically perfect gases.

Original language	English (US)
Pages (from-to)	45-47
Number of pages	3
Journal	Procedia IUTAM
Volume	14
DOIs	https://doi.org/10.1016/j.piutam.2015.03.022
State	Published - 2015
Event	8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 - Rio de Janeiro, Brazil Duration: Sep 8 2014 → Sep 12 2014

Keywords

Stability
boundary layer
high enthalpy air

ASJC Scopus subject areas

Mechanical Engineering

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10.1016/j.piutam.2015.03.022

Cite this

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title = "The Second Mode in High-enthalpy Boundary Layers in Chemical Non-equilibrium",

abstract = "Boundary layers at a zero pressure gradient in chemical non-equilibrium are considered for a five-species model of air in a total enthalpy range of 5 - 17 MJ/kg. Comparisons with boundary layers in binary mixtures of oxygen reveal that the growth rates of the second mode are lower in the case of air. This result can be attributed to the lower wall temperatures in binary mixtures of oxygen due to dissociation, with the lower wall temperatures having a destabilizing effect on the second mode similar to the case of boundary layers in calorically perfect gases.",

keywords = "Stability, boundary layer, high enthalpy air",

author = "Jill Klentzman and Anatoli Tumin",

note = "Funding Information: This work was sponsored by the NASA/AFOSR/National Center for Hypersonic Research in Laminar-Turbulent Transition. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsement, either expressed or implied, of the U. S. Government. Publisher Copyright: {\textcopyright} 2015 The Authors.; 8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014 ; Conference date: 08-09-2014 Through 12-09-2014",

year = "2015",

doi = "10.1016/j.piutam.2015.03.022",

language = "English (US)",

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pages = "45--47",

journal = "Procedia IUTAM",

issn = "2210-9838",

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T1 - The Second Mode in High-enthalpy Boundary Layers in Chemical Non-equilibrium

AU - Klentzman, Jill

AU - Tumin, Anatoli

N1 - Funding Information: This work was sponsored by the NASA/AFOSR/National Center for Hypersonic Research in Laminar-Turbulent Transition. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsement, either expressed or implied, of the U. S. Government. Publisher Copyright: © 2015 The Authors.

PY - 2015

Y1 - 2015

N2 - Boundary layers at a zero pressure gradient in chemical non-equilibrium are considered for a five-species model of air in a total enthalpy range of 5 - 17 MJ/kg. Comparisons with boundary layers in binary mixtures of oxygen reveal that the growth rates of the second mode are lower in the case of air. This result can be attributed to the lower wall temperatures in binary mixtures of oxygen due to dissociation, with the lower wall temperatures having a destabilizing effect on the second mode similar to the case of boundary layers in calorically perfect gases.

AB - Boundary layers at a zero pressure gradient in chemical non-equilibrium are considered for a five-species model of air in a total enthalpy range of 5 - 17 MJ/kg. Comparisons with boundary layers in binary mixtures of oxygen reveal that the growth rates of the second mode are lower in the case of air. This result can be attributed to the lower wall temperatures in binary mixtures of oxygen due to dissociation, with the lower wall temperatures having a destabilizing effect on the second mode similar to the case of boundary layers in calorically perfect gases.

KW - Stability

KW - boundary layer

KW - high enthalpy air

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DO - 10.1016/j.piutam.2015.03.022

M3 - Conference article

SN - 2210-9838

VL - 14

SP - 45

EP - 47

JO - Procedia IUTAM

JF - Procedia IUTAM

T2 - 8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014

Y2 - 8 September 2014 through 12 September 2014

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The Second Mode in High-enthalpy Boundary Layers in Chemical Non-equilibrium

Abstract

Keywords

ASJC Scopus subject areas

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