Article
Energy & Fuels
Linyuan Huang, Sheng Huang, Yebing Mao, Bo Wang, Quan Zhu, Rongpei Jiang
Summary: This work develops a new surrogate fuel for RP-3 kerosene and validates its consistency with the original fuel in terms of combustion characteristics through experiments and kinetic modeling. In addition, the flame propagation process and instability of the fuel under high temperature and pressure conditions were analyzed.
Article
Energy & Fuels
Qiao Wang, Wanchen Sun, Liang Guo, Shaodian Lin, Peng Cheng, Hao Zhang, Yuying Yan
Summary: In this study, the laminar burning speed, Markstein length, and cellular instability of oxygenated fuels PODE3, DMC, and NB were experimentally analyzed. PODE3 exhibited the highest laminar burning speed, while the flame stability of DMC and NB was similar at high initial pressure. The molecular structure of the oxygenated fuels influenced the flame propagation characteristics through fuel-specific cracking pathways and intermediate reactivity.
Article
Thermodynamics
Ya Li, Wu Xu, Yong Jiang, K. M. Liew, Rong Qiu
Summary: The study investigated the laminar burning velocities and cellular instability of 2-methyltetrahydrofuran at different pressures, revealing significant changes in flame behavior with increasing pressure. The use of a specific oxygen and helium mixture was found to effectively suppress cellular instability. Additionally, chemical kinetic effects on burning velocity were explored, highlighting the importance of small species reactions and sensitivity to pressure changes.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Energy & Fuels
Marwaan AL-Khafaji, Junfeng Yang, Alison S. Tomlin, Harvey M. Thompson, Gregory de Boer, Kexin Liu, Mohamed E. Morsy
Summary: Spherically expanding flame propagations were used to measure flame speeds for H2/CH4/air mixtures. The study provided rare experimental data on laminar burning velocities and Markstein numbers at high pressures. Simulation results using different chemical kinetic mechanisms were compared with the experimental data. The results showed that the laminar burning velocities increased with hydrogen fraction and temperature, and decreased with pressure. There was generally good agreement between simulations and experiments, but the agreement decreased for rich-pure hydrogen flames at high initial pressures.
Article
Energy & Fuels
Yebing Mao, Yunkai Gao, Shangjun Li, Chao Yang, Linyuan Huang, Sheng Huang, ChangHua Zhang, Xiaobing Hu
Summary: The study investigated the combustion characteristics of a newly developed coal-derived rocket kerosene to evaluate its feasibility and compatibility. The flame propagation properties and auto-ignition characteristics of the fuel were studied, and a kinetic model was proposed to simulate the combustion chemistry.
Article
Energy & Fuels
Natarajan Rajesh, Chockalingam Prathap
Summary: This study measured the combustion characteristics of premixed n-dodecane-air mixtures and examined the effects of pressure and temperature. By comparing existing reaction mechanisms, the best model was identified. The findings provide valuable insights into the combustion characteristics of multicomponent fuels.
Article
Energy & Fuels
Jianshu Mao, Xiao Ma, Hongming Xu, Yanfei Li, Zhi Wang, Shijin Shuai
Summary: This study investigated the combustion characteristics and flame instability of Polyoxymethylene dimethyl ether (PODEn) as a diesel substitute fuel through experiments and numerical simulations. The results showed that the laminar burning speed of PODE3 decreased with initial pressure, and the laminar burning speed of PODE3/iso-octane blends was linearly related to the PODE3 volume fractions. In addition, PODE3 exhibited improved flame stability, and flame instability decreased with increased PODE3 volume fractions but increased with increased initial pressure and equivalence ratio.
Article
Thermodynamics
Huizhen Li, Huahua Xiao
Summary: This study measured the Markstein length and laminar burning velocity of NH3/DME/air mixtures for different blend ratios and varied H-2 additions. A reduced kinetics mechanism was developed based on a prior detailed mechanism, providing accurate predictions for NH3, DME, NH3/DME, and NH3/DME/H-2. The results showed that the existence of H-2 effectively increased the laminar burning velocity, and the peak value of laminar burning velocity occurred at a specific equivalence ratio. Rating: 8/10.
COMBUSTION AND FLAME
(2023)
Article
Chemistry, Physical
Cangsu Xu, Qiyang Wang, Xiaolu Li, Kai Liu, Weinan Liu, Francis Oppong, Zuo-Yu Sun
Summary: This study investigated the influence of hydrogen addition on the combustion of aviation kerosene by measuring the laminar burning velocity and Markstein length of n-decane/hydrogen/air mixtures. The research found that the laminar burning velocity showed a linear relationship with the hydrogen addition ratio, and the decreased Markstein length increased the flame front instability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Berk Can Duva, Elisa Toulson
Summary: The fundamental combustion characteristics of H-2/air flames with the addition of actual H-2/air combustion residuals were examined experimentally and numerically. The results showed that the flame speed and adiabatic flame temperature decreased linearly with increasing diluent level, while the change in burned gas Markstein length was more complex.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Willyanto Anggono, Akihiro Hayakawa, Ekenechukwu C. Okafor, Gabriel Jeremy Gotama, Stevan Wongso
Summary: The study found that an increase in CO2 dilution ratio reduces the laminar burning velocity of CH4/CO2/Air mixtures and affects the flame response to stretch. Results showed a non-monotonic relationship between CO2 dilution ratio and different equivalence ratios, with an increase in CO2 enhancing the flames' response to stretch.
COMBUSTION SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Xu He, Zechang Liu, Houshi Jiang, Fengshan Liu, Qing Yang, Zhenghui Jiang, Guangyuan Feng
Summary: The laminar burning velocity and Markstein length of TRF-air mixtures are investigated under different initial conditions. Linear and nonlinear extrapolation models are compared and it is found that the linear model yields higher extrapolation results due to differences in the third term of Taylor expansion. By adjusting the extrapolation radius, the uncertainty in laminar burning velocity and Markstein length caused by the extrapolation model can be minimized.
Article
Energy & Fuels
Ryuhei Kanoshima, Akihiro Hayakawa, Takahiro Kudo, Ekenechukwu C. Okafor, Sophie Colson, Akinori Ichikawa, Taku Kudo, Hideaki Kobayashi
Summary: The study focused on investigating the laminar burning velocities and Markstein lengths of ammonia/air mixtures under high-temperature and high-pressure conditions, and compared the effects with methane/air mixtures. Results showed that temperature exponent of ammonia flames was larger and had greater impact on reaction rate compared to methane flames, while pressure exponent of ammonia flames was closer to zero.
Article
Energy & Fuels
Jian Liu, Dingrui Zhang, Lingyun Hou, Jinhu Yang, Gang Xu
Summary: This study investigates the flame propagation characteristics of aviation kerosene under low pressure conditions using both experimental and numerical simulation methods. The laminar burning speeds at different pressures, temperatures, and equivalence ratios were measured and a predictive equation was obtained. The results demonstrate that low pressures suppress both hydrodynamic and diffusional thermal flame instabilities, as well as reduce the negative effects of specific reactions on burning speed.
Article
Energy & Fuels
Xiao Ma, Jianshu Mao, Yixiao Zhang, Yue Ma, Zhi Wang, Shijin Shuai
Summary: Blending n-butanol with ammonia improves combustion performance and enables carbon-neutral combustion systems. The study investigated the burning speed and Markstein length of n-butanol/ammonia/air mixtures at different equivalence ratios. Results showed that the burning speed and Markstein length were influenced by ammonia fraction, initial pressure, and temperature.
Article
Thermodynamics
Feichi Zhang, Thorsten Zirwes, Peter Habisreuther, Henning Bockhorn, Dimosthenis Trimis, Holger Nawroth, Christian O. Paschereit
COMBUSTION SCIENCE AND TECHNOLOGY
(2019)
Article
Energy & Fuels
Peter Habisreuther, Bjoern Stelzner, Alexandra Loukou, Petros Vlavakis, Dimosthenis Trimis
Article
Thermodynamics
Flavio Cesar Cunha Galeazzo, Newton Kiyoshi Fukumasu, Jordan Asenov Denev, Christof Weis, Peter Habisreuther, Guenther Carlos Krieger Filho
COMBUSTION SCIENCE AND TECHNOLOGY
(2019)
Article
Thermodynamics
Feichi Zhang, Thorsten Zirwes, Peter Habisreuther, Nikolaos Zarzalis, Henning Bockhorn, Dimosthenis Trimis
Summary: This study presents a numerical analysis of the initial turbulent flow characteristics and flow field features in a fan-stirred combustion vessel prior to ignition. The results show good agreement between the calculated turbulence parameters and measured data, confirming the homogeneity and isotropy of the turbulent flow field when using rotating fans to stir the mixture.
COMBUSTION SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Thorsten Zirwes, Feichi Zhang, Peter Habisreuther, Maximilian Hansinger, Henning Bockhorn, Michael Pfitzner, Dimosthenis Trimis
FLOW TURBULENCE AND COMBUSTION
(2020)
Article
Thermodynamics
Maximilian Hansinger, Thorsten Zirwes, Julian Zips, Michael Pfitzner, Feichi Zhang, Peter Habisreuther, Henning Bockhorn
FLOW TURBULENCE AND COMBUSTION
(2020)
Article
Thermodynamics
Feichi Zhang, Thorsten Zirwes, Peter Habisreuther, Nikolaos Zarzalis, Henning Bockhorn, Dimosthenis Trimis
Summary: Large eddy simulations were conducted to study turbulent flame propagation in high-pressure conditions, revealing increased flame wrinkling and burning rate enhancement. The turbulence energy spectra shifted to higher wave number range with increased pressure, resulting in reinforced small-scale turbulent fluctuations. The enhanced small-scale turbulent fluctuations, along with formation of small-scale vortices and flame structures, over-compensated for the reduced local laminar burning velocity at high pressures, leading to increased flame wrinkling and burning rate.
FLOW TURBULENCE AND COMBUSTION
(2021)
Article
Thermodynamics
Thorsten Zirwes, Feichi Zhang, Yiqing Wang, Peter Habisreuther, Jordan A. Denev, Zheng Chen, Henning Bockhorn, Dimosthenis Trimis
Summary: This study introduces a tracking algorithm for Flame Particles (FP) using barycentric coordinates, which adds value in studying local flame dynamics. By seeding FPs along the flame surface and tracking their trajectories at arbitrary points on the flame front, a phase shift between the unsteady flame stretch rate and local flame speed is revealed.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Green & Sustainable Science & Technology
Feichi Zhang, Thorsten Zirwes, Thomas Mueller, Simon Wachter, Tobias Jakobs, Peter Habisreuther, Nikolaos Zarzalis, Dimosthenis Trimis, Thomas Kolb
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2020)
Article
Thermodynamics
Christoph Wieland, Christof Weis, Peter Habisreuther, Dimosthenis Trimis
Summary: This study investigates the combustion reactions and heat transfer processes inside porous burners using a three-dimensional direct pore level simulation method. The results indicate that the specific surface area of the porous structure is a significant factor affecting the radiation efficiency.
COMBUSTION AND FLAME
(2022)
Article
Mechanics
Feichi Zhang, Thorsten Zirwes, Simon Wachter, Tobias Jakobs, Peter Habisreuther, Nikolaos Zarzalis, Dimosthenis Trimis, Thomas Kolb, Henning Bockhorn, Dieter Stapf
Summary: Numerical simulations were conducted to investigate the impact of the angle a between the central liquid jet and annular airflow on the atomization process. The results showed that the core length LC of the liquid jet decreased as the angle a increased from 0 to 30 degrees due to reinforced aerodynamic interaction. However, for angles greater than 30 degrees, the gas flow velocity along the liquid jet decreased and LC increased. Flow direction was found to have a significant impact on the atomization process, in addition to the common dimensionless operating parameters.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Thermodynamics
Thorsten Zirwes, Feichi Zhang, Peter Habisreuther, Maximilian Hansinger, Henning Bockhorn, Michael Pfitzner, Dimosthenis Trimis
Summary: Researchers utilized a quasi-DNS database of a compositionally inhomogeneous partially-premixed flame to directly compare different flame regime markers, aiming to evaluate their behavior in a resolved turbulent flame with partially-premixed characteristics.
FLOW TURBULENCE AND COMBUSTION
(2021)
Article
Green & Sustainable Science & Technology
Feichi Zhang, Hosein Heidarifatasmi, Stefan Harth, Thorsten Zirwes, Robert Wang, Michal Fedoryk, Nadia Sebbar, Peter Habisreuther, Dimosthenis Trimis, Henning Bockhorn
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2020)
Proceedings Paper
Energy & Fuels
Robbin Bhagwan, Alexander Schwagerus, Christof Weis, Peter Habisreuther, Nikolaos Zarzalis, Michael Huth, Berthold Koestlin, Stefan Dederichs
PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, 2019, VOL 4A
(2019)
Proceedings Paper
Engineering, Mechanical
R. Bhagwan, P. Habisreuther, N. Zarzalis
PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, 2018, VOL 4A
(2018)