Influence of O2/N2 oxidizer blends on soot formation and radiative heat flux in PMMA-air 2D slab burner for understanding hybrid rocket combustion

Aphale, Siddhant S.; Budzinski, Kenneth; Surina, III, Gabriel; DesJardin, Paul E.

doi:10.1016/j.combustflame.2021.111628

Title: Influence of O₂/N₂ oxidizer blends on soot formation and radiative heat flux in PMMA-air 2D slab burner for understanding hybrid rocket combustion

Journal Article · 06 August 2021 · Combustion and Flame

DOI: https://doi.org/10.1016/j.combustflame.2021.111628 · OSTI ID:1813317

Aphale, Siddhant S. ^[1]; Budzinski, Kenneth ^[2]; Surina, III, Gabriel ^[2]; DesJardin, Paul E. ^[2]

State Univ. of New York (SUNY), Buffalo, NY (United States); SUNY University at Buffalo, Department of Mechanical and Aerospace Engineering
State Univ. of New York (SUNY), Buffalo, NY (United States)

The focus of this study is to establish a correlation between the flame to fuel incident radiative heat flux (RHF) in 1D steady-state diffusion flames to non-intrusively measured RHF in 2D slab burner experiments for a range of O₂/N₂ oxidizer blends. Slab burner experiments are conducted for a range of increasing O₂ concentrations from 17% to 100% in the oxidizer stream. Non-intrusive two-color pyrometry is used to determine flame temperature, soot volume fraction, and flame to fuel surface RHF. Measurements and modeling confirm soot volume fraction attains a local maximum for an O₂ concentration of 45%. Low-strain diffusion flame modeling shows the reason for the local maximum is the relative location of the soot formation/nucleation fronts relative to oxidation which decreases with increasing O₂ concentration. Overall good agreement between modeling and measurements of radiative heat flux to the fuel is observed for the fuel and range of O₂ concentrations considered. Furthermore, these results demonstrate the viability of using flamelet modeling approaches for describing hybrid rocket motors.

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Research Organization:: State Univ. of New York (SUNY), Buffalo, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)

Grant/Contract Number:: NA0003961

OSTI ID:: 1813317

Journal Information:: Combustion and Flame, Journal Name: Combustion and Flame Vol. 234; ISSN 0010-2180

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

2D slab burner
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Fuel radiative heat flux
Hybrid rocket
Solid fuel combustion
Soot volume fraction
Two-color pyrometry

Title: Influence of O2/N2 oxidizer blends on soot formation and radiative heat flux in PMMA-air 2D slab burner for understanding hybrid rocket combustion

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References (37)

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Related Subjects

Title: Influence of O₂/N₂ oxidizer blends on soot formation and radiative heat flux in PMMA-air 2D slab burner for understanding hybrid rocket combustion