Role of low-Temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures

Wenkai Liang; Rémy Mével; Chung K. Law

Role of low-Temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures

Wenkai Liang, Rémy Mével, Chung K. Law

Research output: Contribution to conference › Paper › peer-review

Abstract

Numerical simulation of the ZND detonation structure of mixtures of n-heptane, oxygen and diluent detonations was performed with detailed chemistry. Results show that low-Temperature chemistry is activated behind high Mach number shock waves with increasing dilutions of CO₂, which leads to non-monotonous thermicity profiles with two stages of energy release caused by low-and high-Temperature chemistries, respectively. For the evolution of the induction length and cell size, although the total length scales do not show negative response with increasing temperature, the length scale of the first-stage ignition demonstrates negative response when the post-shock temperature decreases within the NTC (negative temperature coefficient) regime.

Original language	English (US)
State	Published - 2018
Event	2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 - State College, United States Duration: Mar 4 2018 → Mar 7 2018

Other

Other	2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
Country/Territory	United States
City	State College
Period	3/4/18 → 3/7/18

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Physical and Theoretical Chemistry
General Chemical Engineering

Keywords

Detonation Cell Size
Induction Length
Low Temperature Chemistry
n-Heptane

Cite this

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title = "Role of low-Temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures",

abstract = "Numerical simulation of the ZND detonation structure of mixtures of n-heptane, oxygen and diluent detonations was performed with detailed chemistry. Results show that low-Temperature chemistry is activated behind high Mach number shock waves with increasing dilutions of CO2, which leads to non-monotonous thermicity profiles with two stages of energy release caused by low-and high-Temperature chemistries, respectively. For the evolution of the induction length and cell size, although the total length scales do not show negative response with increasing temperature, the length scale of the first-stage ignition demonstrates negative response when the post-shock temperature decreases within the NTC (negative temperature coefficient) regime.",

keywords = "Detonation Cell Size, Induction Length, Low Temperature Chemistry, n-Heptane",

author = "Wenkai Liang and R{\'e}my M{\'e}vel and Law, {Chung K.}",

note = "Publisher Copyright: {\textcopyright} 2018 Eastern States Section of the Combustion Institute. All rights reserved.; 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 ; Conference date: 04-03-2018 Through 07-03-2018",

year = "2018",

language = "English (US)",

}

TY - CONF

T1 - Role of low-Temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures

AU - Liang, Wenkai

AU - Mével, Rémy

AU - Law, Chung K.

PY - 2018

Y1 - 2018

N2 - Numerical simulation of the ZND detonation structure of mixtures of n-heptane, oxygen and diluent detonations was performed with detailed chemistry. Results show that low-Temperature chemistry is activated behind high Mach number shock waves with increasing dilutions of CO2, which leads to non-monotonous thermicity profiles with two stages of energy release caused by low-and high-Temperature chemistries, respectively. For the evolution of the induction length and cell size, although the total length scales do not show negative response with increasing temperature, the length scale of the first-stage ignition demonstrates negative response when the post-shock temperature decreases within the NTC (negative temperature coefficient) regime.

AB - Numerical simulation of the ZND detonation structure of mixtures of n-heptane, oxygen and diluent detonations was performed with detailed chemistry. Results show that low-Temperature chemistry is activated behind high Mach number shock waves with increasing dilutions of CO2, which leads to non-monotonous thermicity profiles with two stages of energy release caused by low-and high-Temperature chemistries, respectively. For the evolution of the induction length and cell size, although the total length scales do not show negative response with increasing temperature, the length scale of the first-stage ignition demonstrates negative response when the post-shock temperature decreases within the NTC (negative temperature coefficient) regime.

KW - Detonation Cell Size

KW - Induction Length

KW - Low Temperature Chemistry

KW - n-Heptane

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M3 - Paper

AN - SCOPUS:85049228866

T2 - 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018

Y2 - 4 March 2018 through 7 March 2018

ER -

Role of low-Temperature chemistry in detonation of n-heptane/oxygen/diluent mixtures

Abstract

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All Science Journal Classification (ASJC) codes

Keywords

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