Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

DNS of Flame Stabilization Dynamics of a Swirl-Stabilized Spray Burner Using Sustainable Aviation Fuels

Conference ·
DOI:https://doi.org/10.2514/6.2024-1999· OSTI ID:2403001
; ; ;
Concern for emission reduction has motivated the development of new cost-effective alternative sustainable aviation fuels (SAFs). Drop-in SAFs with blends of the certified and the alternative fuels are beneficial because they do not require engine modifications for use in current aviation engines. Combustion characteristics are of particular concern when comparing a new fuel with Jet-A. Lean blow-off and flame stabilization have been identified to be governed by the fuel propensity to autoignition, i.e. derived cetane number. However, fundamental investigation is required to identify the impact of derived cetane number on the combustion mode of flame stabilization in a realistic combustor. The combustion mode has also a direct impact on turbulent combustion modeling closures. DNS simulations are performed in the low-Mach solver of the Pele Suite called PeleLMeX. Lagrangian multi-phase modeling is used to capture the liquid spray injection of Jet-A (reference fuel) and C1 as a representative of a low cetane number SAF. Adaptive Mesh Refinement (AMR) is used to enable a more efficient simulation of a more realistic domain size and embedded boundary treatment is used to model a bluff-body geometry. Local extinction and edge flame propagation were observed for both fuels. The edge flame propagation mode was quantified in terms of a Damkohler number defined as the ratio between progress variable reaction rate and its diffusive flux. Initial analysis suggests that a mixed mode combustion occurs for the edge flame propagation, with flame propagation assisted by ignition and autoignition co-existing for both Jet-A and C1 flames. The analysis of the extinction region shows a larger progress variable for Jet-A which can further increase the local displacement speed and present a faster reignition of the stoichiometric mixture fraction.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
2403001
Report Number(s):
NREL/CP-2C00-90508; MainId:92286; UUID:a5e85826-743a-4126-85a0-a34d3aea89f4; MainAdminId:73085
Country of Publication:
United States
Language:
English

References (9)

Investigation of flame propagation in autoignitive blends of n -heptane and methane fuel journal May 2019
Lean Blow-Off Scaling of Turbulent Premixed Bluff-Body Flames of Vaporized Liquid Fuels journal May 2021
A comparison between fossil and synthetic kerosene flames from the perspective of soot emissions in a swirl spray RQL burner journal January 2023
Data-driven chemical kinetic reaction mechanism for F-24 jet fuel ignition journal April 2021
Transport impacts on atmosphere and climate: Aviation journal December 2010
Reference Jet Fuels for Combustion Testing conference January 2017
A DNS study of ignition characteristics of a lean iso-octane/air mixture under HCCI and SACI conditions journal January 2013
The structure and propagation of laminar flames under autoignitive conditions journal February 2018
Characteristic Timescales for Lean Blowout of Alternative Jet Fuels conference July 2018

Similar Records

A 2-D DNS investigation of extinction and reignition dynamics in nonpremixed flame-vortex interactions
Journal Article · 2008 · Combustion and Flame · OSTI ID:21036813
Modeling of hydrogen-air diffusion flame. Interim report
Technical Report · 1989 · OSTI ID:5649447
Multi-regime mixing modeling for local extinction and re-ignition in turbulent non-premixed flame by using LES/FDF method
Journal Article · 2023 · Flow, Turbulence and Combustion · OSTI ID:1971654

Related Subjects

ADVANCED PROPULSION SYSTEMS
BIOMASS FUELS
MATHEMATICS AND COMPUTING
adaptive mesh refinement
alternative fuels
aviation
combustors
computational fluid dynamics
fuel injection
probability density functions
shear layers
sustainable aviation fuel
turbulent combustion