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

Producción científica: Conference contribution › revisión exhaustiva

5 Citas (Scopus)

Resumen

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.

Idioma original	English
Título de la publicación alojada	54th AIAA Aerospace Sciences Meeting
DOI	https://doi.org/10.2514/6.2016-0440
Estado	Published - 2016
Evento	54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States Duración: ene 4 2016 → ene 8 2016

Serie de la publicación

Nombre	54th AIAA Aerospace Sciences Meeting
Volumen	0

Conference

Conference	54th AIAA Aerospace Sciences Meeting, 2016
País/Territorio	United States
Ciudad	San Diego
Período	1/4/16 → 1/8/16

Nota bibliográfica

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

Financiación

This work was supported by the Air Force Office of Scientific Research under basic research grant FA9550-15-1-0512 (Project monitor: Dr. Chiping Li).

Financiadores	Número del financiador
Air Force Office of Scientific Research, United States Air Force	FA9550-15-1-0512

ASJC Scopus subject areas

Aerospace Engineering

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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",

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doi = "10.2514/6.2016-0440",

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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

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T2 - 54th AIAA Aerospace Sciences Meeting, 2016

Y2 - 4 January 2016 through 8 January 2016

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

Resumen

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