Growth rate and flame structure of turbulent premixed flame Kernels in supersonic flows

Bradley A. Ochs; Dan Fries; Suresh Menon; David E. Scarborough

doi:10.2514/6.2016-0440

Growth rate and flame structure of turbulent premixed flame Kernels in supersonic flows

Bradley A. Ochs, Dan Fries, Suresh Menon, David E. Scarborough

Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Scopus citations

Abstract

A fundamental study of the radial growth and flame surface characteristics of freely propagating spherical flames is conducted in a 50 × 50 mm², M = 1.5 supersonic wind tunnel. Free stream turbulence is enhanced via passive and active turbulence generators upstream of the converging-diverging nozzle. Methane-air flame kernels are ignited via a single pulse of a frequency doubled green (532 nm) Nd³⁺:YAG laser. Simultaneous stereoPIV/OH PLIF measurements and asynchronous Schlieren and OH chemiluminescence are collected at several downstream locations to evaluate the flame kernel evolution. Time averaged parameters: turbulent displacement velocity, mean and rms velocities, turbulence autocorrelation and energy spectra are presented. Extra consideration is given to the terms pertinent to numerical model evaluation in supersonic flows.

Original language	English
Title of host publication	54th AIAA Aerospace Sciences Meeting
DOIs	https://doi.org/10.2514/6.2016-0440
State	Published - 2016
Event	54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States Duration: Jan 4 2016 → Jan 8 2016

Publication series

Name	54th AIAA Aerospace Sciences Meeting
Volume	0

Conference

Conference	54th AIAA Aerospace Sciences Meeting, 2016
Country/Territory	United States
City	San Diego
Period	1/4/16 → 1/8/16

Bibliographical note

Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

ASJC Scopus subject areas

Aerospace Engineering

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10.2514/6.2016-0440

Cite this

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title = "Growth rate and flame structure of turbulent premixed flame Kernels in supersonic flows",

abstract = "A fundamental study of the radial growth and flame surface characteristics of freely propagating spherical flames is conducted in a 50 × 50 mm2, M = 1.5 supersonic wind tunnel. Free stream turbulence is enhanced via passive and active turbulence generators upstream of the converging-diverging nozzle. Methane-air flame kernels are ignited via a single pulse of a frequency doubled green (532 nm) Nd3+:YAG laser. Simultaneous stereoPIV/OH PLIF measurements and asynchronous Schlieren and OH chemiluminescence are collected at several downstream locations to evaluate the flame kernel evolution. Time averaged parameters: turbulent displacement velocity, mean and rms velocities, turbulence autocorrelation and energy spectra are presented. Extra consideration is given to the terms pertinent to numerical model evaluation in supersonic flows.",

author = "Ochs, {Bradley A.} and Dan Fries and Suresh Menon and Scarborough, {David E.}",

note = "Publisher Copyright: {\textcopyright} 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; 54th AIAA Aerospace Sciences Meeting, 2016 ; Conference date: 04-01-2016 Through 08-01-2016",

year = "2016",

doi = "10.2514/6.2016-0440",

language = "English",

isbn = "9781624103933",

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AU - Ochs, Bradley A.

AU - Fries, Dan

AU - Menon, Suresh

AU - Scarborough, David E.

PY - 2016

Y1 - 2016

N2 - A fundamental study of the radial growth and flame surface characteristics of freely propagating spherical flames is conducted in a 50 × 50 mm2, M = 1.5 supersonic wind tunnel. Free stream turbulence is enhanced via passive and active turbulence generators upstream of the converging-diverging nozzle. Methane-air flame kernels are ignited via a single pulse of a frequency doubled green (532 nm) Nd3+:YAG laser. Simultaneous stereoPIV/OH PLIF measurements and asynchronous Schlieren and OH chemiluminescence are collected at several downstream locations to evaluate the flame kernel evolution. Time averaged parameters: turbulent displacement velocity, mean and rms velocities, turbulence autocorrelation and energy spectra are presented. Extra consideration is given to the terms pertinent to numerical model evaluation in supersonic flows.

AB - A fundamental study of the radial growth and flame surface characteristics of freely propagating spherical flames is conducted in a 50 × 50 mm2, M = 1.5 supersonic wind tunnel. Free stream turbulence is enhanced via passive and active turbulence generators upstream of the converging-diverging nozzle. Methane-air flame kernels are ignited via a single pulse of a frequency doubled green (532 nm) Nd3+:YAG laser. Simultaneous stereoPIV/OH PLIF measurements and asynchronous Schlieren and OH chemiluminescence are collected at several downstream locations to evaluate the flame kernel evolution. Time averaged parameters: turbulent displacement velocity, mean and rms velocities, turbulence autocorrelation and energy spectra are presented. Extra consideration is given to the terms pertinent to numerical model evaluation in supersonic flows.

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DO - 10.2514/6.2016-0440

M3 - Conference contribution

AN - SCOPUS:85007574623

SN - 9781624103933

T3 - 54th AIAA Aerospace Sciences Meeting

BT - 54th AIAA Aerospace Sciences Meeting

T2 - 54th AIAA Aerospace Sciences Meeting, 2016

Y2 - 4 January 2016 through 8 January 2016

ER -

Growth rate and flame structure of turbulent premixed flame Kernels in supersonic flows

Abstract

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ASJC Scopus subject areas

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