Article
Mechanics
Tao Tang, Zhenguo Wang, Jiangfei Yu, Yuhui Huang, Mingbo Sun, Hongbo Wang, Guoyan Zhao, Yixin Yang, Dapeng Xiong
Summary: Large-eddy simulations have been used to investigate fuel-jet mixing and combustion characteristics in high-enthalpy inflow with trace-gas species. The results show that the presence of atomic oxygen and nitrous oxide has a significant influence on ignition delay times and flame distribution. The complex shock-wave system generated by the transverse jet enhances mixing and induces combustion.
Article
Mechanics
T. Nilsson, S. Zhong, C. Fureby
Summary: In this study, large eddy simulation (LES) of supersonic flow, mixing, self-ignition, and combustion in a supersonic hydrogen jet in a crossflow configuration is reported. The LES model used is based on filtered mass, momentum, species, and energy equations and an explicit flow solver. Effects of jet-to-crossflow momentum ratio, chemical reaction mechanism, and subgrid combustion model are investigated by comparing predictions with experimental data, showing good agreement but with some departures for certain reaction mechanisms and LES combustion models. The LES results are also used to elucidate flow, mixing, and combustion features of this configuration.
Article
Engineering, Aerospace
Majie Zhao, Taohong Ye, Qinling Li
Summary: Large-eddy simulations combined with the partially stirred reactor combustion model were used to investigate the turbulent mixing, combustion mode, and flame stability of a sonic hydrogen jet injecting into high-enthalpy supersonic crossflow. The study identified ignition processes influenced by shock and reflected shock effects.
Article
Mechanics
Fei Li, Zhenguo Wang, Peibo Li, Mingbo Sun, Hongbo Wang
Summary: This study numerically investigates the gas-liquid mixing process of a liquid jet in supersonic crossflow. The simulation results show good agreement with experimental data, capturing the penetration depth and lateral extension width of the spray. The influence of counter-rotating vortex pair and horseshoe vortex on the transport process and formation of spray foot is systematically studied.
Article
Engineering, Aerospace
Chen-Liang Qiao, He-Yong Xu, Jing Li, Han-Dong Hu
Summary: This study investigates the sonic transverse jet on a high-speed missile and analyzes the effects of injection pressure ratio and injection angle on the jet. The instability of jet-crossflow interaction and its influence on the control system are also studied. The findings provide valuable insights for the design of control systems.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Kangchun Zhao, Zhixun Xia, Likun Ma, Yifan Duan, Jiarui Zhang, Yunchao Feng, Binbin Cheng, Pengnian Yang
Summary: Large eddy simulation is used to study the gas-particle two-phase transverse jet in supersonic flow. The Eulerian method is used to simulate the fluid, and the Lagrangian method is used to simulate the particles. Different particle mass fractions and Stokes numbers are studied numerically, with the findings that larger particles are mainly located above the counter-rotating vortex pair and smaller particles are mainly located in the counter-rotating vortex pair. Characteristic phenomena such as particle trailing and wave structure constructed of particle cloud are observed, with the particles also lowering the Mach disk.
Article
Thermodynamics
Zhiyuan Zhao, Fengbo Wen, Xiaolei Tang, Yuxi Luo, Rui Hou, Zhongqi Wang
Summary: The study on film cooling with delta winglet vortex generator pair (DWVGP) shows that vortical structures have a significant impact on film cooling effectiveness in the flow field of a jet in crossflow (JICF). The DWVGP evolved anti-CRVP allows for earlier reattachment of coolant and achieves enhanced film cooling effectiveness in the spanwise direction.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Aerospace
Jiafeng Zhao, YongJie Ren, Yiheng Tong, Wei Lin, Wansheng Nie
Summary: The study investigated the diffusion process and spatial distribution of a liquid jet in supersonic crossflow through experiments and simulations. The results showed good agreement between experiments and simulations, revealing the evolution of the spray in three stages: aerodynamic induced liquid column fracturing, expansion wave promoted spray accelerating, and compression wave disturbed spray blending. The configuration of the channel changed the direction and strength of the supersonic airflow, impacting the spray diffusion.
Article
Chemistry, Physical
Yuelei Zhang, Puneet Rana, R. Moradi, Zhixiong Li
Summary: This study investigates the impact of coaxial injector arrays of hydrogen/air multi-jet on fuel mixing performance, aiming to optimize fuel distribution and penetration downstream in different operating conditions. The results show that the injection of coaxial air/hydrogen jet significantly enhances mixing downstream and the fuel jet space of 7 Dj offers maximum fuel mixing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Mechanics
Chang-Hai Liang, Ming-Bo Sun, Da-Peng Xiong
Summary: Large-eddy simulations and nanoparticle-based planar laser scattering experiments were conducted to investigate the physical aspects of transverse sonic jets injected into a supersonic crossflow. The study found that single jets generate a separation shock, while two opposite jets form an oblique shock train. All shocks promote vortex breakage in jet wakes, enhancing local mixing. The interaction between the two jets enhances fuel mixing.
Article
Engineering, Aerospace
Chaoyang Liu, Ning Wang, Kai Yang, Dongpeng Jia, Yu Pan
Summary: This study focuses on the stabilization mechanism of a supersonic lifted jet flame in heated coflows, highlighting the competition between autoignition and the propagation of active kernels at the flame base. Using highly-resolved large eddy simulation, it is found that the characteristics of the lifted hydrogen jet combustion gradually vary along the axial direction, with the evolution of turbulent structures and flameholding mechanism being crucial.
Article
Engineering, Aerospace
Ziao Zhang, Sean F. McCreton, Manuj Awasthi, Angus O. Wills, Danielle J. Moreau, Con J. Doolan
Summary: This study experimentally investigates Transverse Jets In Supersonic Crossflow using flow visualization, revealing shedding vortices and their interaction with adjacent shock structures. The presence of moving shocks in the helium TJISC enhances flow field unsteadiness and alters pressure distributions downstream, with the penetration depth slightly increased compared to air and argon cases.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Shenghao Yu, Bifeng Yin, Qinsheng Bi, Hekun Jia, Chen Chen
Summary: The study focuses on transverse jet breakup behaviors and droplet size distribution for circular and elliptical orifices in supersonic crossflow. Results show that elliptical nozzles have smaller jet penetration depth, more surface waves, and smaller droplet diameter compared to circular nozzles, especially at higher injection pressures.
Article
Mechanics
R. Sebastian, A-M Schreyer
Summary: This study investigates the influence of jet spacing on the control effectiveness of air-jet vortex generators in supersonic flow. Using large-eddy simulations and experimental visualizations, the study analyzes the effects of different jet spacings on flow structures, vortical structures, and boundary-layer statistics. The insights gained from this study are crucial for the development of efficient control setups.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Imran Rasheed, Debi Prasad Mishra
Summary: A high-speed compressible solver is developed by coupling OpenFOAM(R) and Cantera 2.5.0, which can solve detailed chemical reaction mechanisms. A sonic hydrogen jet discharging from a circular injector into a high enthalpy supersonic crossflow over a flat plate is selected as a test case to validate the solver and inspect the capability of RANS in predicting flame characteristics in high-speed flows.
Article
Engineering, Multidisciplinary
Hongda Zhang, Zhou Yu, Taohong Ye, Ming Cheng, Majie Zhao
APPLIED MATHEMATICAL MODELLING
(2018)
Article
Thermodynamics
Hongda Zhang, Zhou Yu, Taohong Ye, Majie Zhao, Ming Cheng
APPLIED THERMAL ENGINEERING
(2018)
Article
Chemistry, Physical
Yifan Bian, Majie Zhao, Qinling Li, Taohong Ye
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Engineering, Aerospace
Majie Zhao, Qinling Li, Taohong Ye
Article
Thermodynamics
Majie Zhao, Jiun-Ming Li, Chiang Juay Teo, Boo Cheong Khoo, Huangwei Zhang
FLOW TURBULENCE AND COMBUSTION
(2020)
Article
Chemistry, Physical
Majie Zhao, Taohong Ye
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Energy & Fuels
Zhiwei Huang, Majie Zhao, Huangwei Zhang
Article
Energy & Fuels
Majie Zhao, Huangwei Zhang
Article
Energy & Fuels
Huangwei Zhang, Majie Zhao, Zhiwei Huang
Article
Chemistry, Physical
Ruixuan Zhu, Majie Zhao, Huangwei Zhang
Summary: This study simulated flame propagation and Deflagration-to-Detonation Transition (DDT) in a two-dimensional obstructed channel filled with stoichiometric ammonia-hydrogen-oxygen mixtures, analyzing the phenomena under different concentrations of ammonia in detail.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Ruixuan Zhu, Xiaohang Fang, Chao Xu, Majie Zhao, Huangwei Zhang, Martin Davy
Summary: In this study, one-dimensional detonations in ammonia/hydrogen-air mixtures were numerically investigated. Pulsating instabilities and periodic coupling and decoupling of shock waves were observed. The oscillatory mode of detonation was determined by the ratio of driver pressure and initial pressure. The effects of hydrogen dilution and mixture equivalence ratio on pulsating detonations were also examined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Majie Zhao, Huangwei Zhang
Article
Engineering, Aerospace
Andre F. P. Ribeiro, Carlos Ferreira, Damiano Casalino
Summary: This study compares a filament-based free wake panel method to experimental and validated numerical data in order to simulate propeller slipstreams and their interaction with aircraft components. The results show that the free wake panel method is able to successfully capture the slipstream deformation and shearing, making it a useful tool for propeller-wing interaction in preliminary aircraft design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2024)
