Article
Thermodynamics
Yanbin Feng, Shibin Luo, Jiawen Song, Kunxiong Xia, Dequan Xu
Summary: This research investigates the combustion characteristics of powder fuel in a supersonic cavity-based combustion chamber to explore the propulsion performance and combustion organization rules of powder fueled scramjets. A numerical simulation method based on the Euler-Lagrange framework is used to analyze and compare the structural features and flame patterns in the combustion chamber under different air-fuel ratio conditions. The results show that stable combustion can be achieved with powder fuel in the supersonic airflow, with the main flame distribution areas being the interior of the cavity and the shear layer near the boundary layer of the expansion section. The findings also reveal that a lower air-fuel ratio is more beneficial for combustion efficiency in the supersonic cavity-based combustor.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Aerospace
Jianbin Li, Jianhan Liang, Mingbo Sun, Zun Cai, Lin Zhang
Summary: This study experimentally investigates the effect of inlet distortion on the combustion process in a direct-connect test environment. The results show that blockage at the entrance of the isolator can accurately mimic the inlet distortion. Combustion enhancement is achieved in cases with blockage, with wider lean blowoff limits in the combustor. The stronger oblique shock wave and additional background shock wave caused by the inlet distortion are the main causes of combustion enhancement in these cases.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Hongbo Wang, Xiliang Song, Liang Li, Yuhui Huang, Mingbo Sun
Summary: Experiments were conducted to investigate the near blowoff characteristics of cavity-stabilized flames in an ethylene-fueled scramjet combustor. It was found that there exists an optimal cavity size for ignition and flame stabilization near lean blowoff conditions, determined by the competition between flow residence time and local equivalence ratio.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhe Zhang, Xing Jin, Wen-xiong Xi
Summary: The study analyzed the combustion characteristics under different injection conditions, revealing that an increase in total pressure of strut fuel injection leads to a decrease in combustion efficiency. However, increasing the total pressure of strut fuel injection within a proper range can expand the combustion area downstream. Increasing the total pressure of cavity fuel injection within the range of 0.5-2.0 MPa expands the combustion range and improves combustion efficiency, but excessive total injection pressure of cavity fuel can result in a sharp drop in efficiency. Increasing the total injection pressure of the plasma jet raises the height of the cavity shear layer and improves the equivalence ratio of the gas mixture in the cavity, with a maximum combustion efficiency of 82.1% achieved at a total pressure of 1.25 MPa. The combustion-assisted effect of different plasma jet media varies significantly, with O2 having the most significant effect on the combustor.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Mechanics
Lin Zhang, Yitao Cao, Jianhan Liang, Yi Wang, Mingbo Sun
Summary: The mixing flow of a sonic transverse jet injection in a supersonic cavity combustor is numerically investigated at two typical inflow velocities. The simulation results show that at low Mach inflow, the separation shock gradually merges with the bow shock, smaller large-scale coherent structures and slower large-scale vortex transport are observed, and narrower range of jet species mass fraction distributions and more upstream large-scale vortices breakdown and dissipation can be observed. The low Mach inflow generates weaker pair of counter-rotating vortices and some trailing counter-rotating vortices, which primarily leads to the weaker jet/cavity interaction.
Article
Engineering, Aerospace
Xiang Li, Qingchun Lei, Xiaocun Zhao, Wei Fan, Shuang Chen, Li Chen, Ye Tian, Quan Zhou
Summary: The combustion characteristics of a hydrogen-fueled supersonic combustor with a large cavity length-to-depth ratio were investigated through experimental trials. The study found that the position of fuel injection and equivalence ratio play important roles in flame stabilization, which was demonstrated by POD and DMD analyses. The findings provide preliminary guidance for exploring the feasibility of using cavity combustors with large length-to-depth ratios in scramjet engines.
Article
Engineering, Aerospace
Shibin Luo, Yanbin Feng, Jiawen Song, Dequan Xu, Kunxiong Xia
Summary: The study investigated the influence of different injection schemes on the flow field and mixing characteristics of powder fuel in a supersonic combustion chamber, showing that the injection mode affects the motion and distribution patterns of particles, which in turn affect the mixing intensity and performance.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Rong Feng, Mingbo Sun, Hongbo Wang, Yuhui Huang, Yifu Tian, Chao Wang, Xu Liu, Jiajian Zhu, Zhenguo Wang
Summary: This study investigates the effect of a multi-channel gliding arc (MCGA) plasma on flameholding in an ethylene-fueled scramjet combustor. The results show that the plasma is able to effectively hold the flame and increase the average flameholding time by 51%. The enhanced temperature in the cavity by the MCGA plasma improves the ignition delay time of the fuel, leading to improved flame stability.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Zun Cai, Jianbin Li, Taiyu Wang, Yanan Wang, Jiajian Zhu
Summary: This study experimentally investigated the combustion process in a cavity-based supersonic combustor. The research found that the combustion process approaches thermal chocking when increasing the equivalence ratio. Increasing the number of cascaded injectors by lowering the injection pressure does not enhance combustion. However, increasing the injection pressure can cause obvious flame oscillations and increase the axis distance of the injectors.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Engineering, Aerospace
Jianping LI, Kai Wang, Guiqian Jiao, Zilong Liao, Jindong LI
Summary: In this study, the combustion characteristics of a kerosene-fueled supersonic combustor were investigated using the flame stabilizing method of cavity and strut. The results showed that the combustor with the strut achieved independent and stable combustion of kerosene, and the porous injection behind the strut improved the atomization and combustion efficiency of kerosene.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Thermodynamics
Rong Feng, Yuhui Huang, Jiajian Zhu, Zhenguo Wang, Mingbo Sun, Hongbo Wang, Zun Cai
Summary: The study demonstrates that a multi-channel gliding arc (MCGA) plasma enhances the ignition and combustion of ethylene fuel in a combustor by generating multiple flame kernels that merge to strengthen ignition, resulting in faster flame propagation and shorter ignition time. The enhancement effect of MCGA on combustion is more significant with increasing global equivalence ratio.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2021)
Article
Engineering, Aerospace
Xin Li, Yu Pan, Chaoyang Liu, Xiao Liu
Summary: To avoid the thermal choking problem in scramjet, a wall-expansion scheme is usually adopted, but it poses challenges to flame holding. This paper uses large eddy simulation to study the effect of expansion angle change on the flameout limit in the strut-based supersonic combustor. The numerical results show the establishment of the recirculation zone and the role of reflected shock waves in enhancing combustion.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Pengfei Xiong, Dong Zheng, Yu Tan, Ye Tian, Jialing Le
Summary: This study experimentally investigates the ignition and flame transient development in an ethylene fueled cavity-based supersonic combustor under low conditions. It is found that ethylene can achieve successful ignition and stable combustion at low inflow Mach numbers, with the combustion mode dependent on the global equivalence ratio (ER). Furthermore, the combustion and shockwaves are observed to strengthen each other until a balance is reached, ensuring stable flow structures and combustion.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Yu Meng, Wenming Sun, Hongbin Gu, Fang Chen, Ruixu Zhou
Summary: This study investigates the combustion mode and instability characteristics of scramjets using the POD method. Experimental observations of flow and combustion behavior were made on a scramjet model with a cavity stabilizer. The results provide insights into the oscillation characteristics of three typical stabilized combustion modes.
Article
Chemistry, Physical
Sai Sreekar Yarasai, Dineshkumar Ravi, Sharan Yoganand, Thundil Karuppa Raj Rajagopal
Summary: A numerical investigation was conducted to analyze the performance and combustion characteristics of a scramjet combustor with and without a cavity. Different geometrical shapes of injectors were considered, including circle, square, and rectangle. The results showed that the circular injector with a cavity exhibited better mixing and combustion characteristics compared to the other injector models.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Mechanical
Rongkang Gao, Sean O'Byrne, Suzanne L. Sheehe, Joseph Kurtz, Jong-Leng Liow
EXPERIMENTS IN FLUIDS
(2017)
Article
Engineering, Aerospace
Yedhu Krishna, Suzanne L. Sheehe, Sean O'Byrne
Article
Optics
Yedhu Krishna, Sean O'Byrne, Kannan Munuswamy, Gopalan Jagadeesh
Article
Optics
Benjamin D. Kaebe, Nickolas P. Robins, Toby K. Boyson, Harald Kleine, Sean O'Byrne
Article
Thermodynamics
Rongkang Gao, Sean O'Byrne, Jong-Leng Liow, Toby K. Boyson
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2018)
Article
Mechanics
R. Prakash, S. Gai, S. O'Byrne
Article
Mechanics
R. Prakash, L. M. Le Page, L. P. McQuellin, S. L. Gai, S. O'Byrne
JOURNAL OF FLUID MECHANICS
(2019)
Article
Energy & Fuels
Eunju Jeong, Sean O'Byrne, In-Seuck Jeung, A. F. P. Houwing
Article
Mechanics
Laurent M. Le Page, Matthew Barrett, Sean O'Byrne, Sudhir L. Gai
Article
Physics, Fluids & Plasmas
Rounak Manoharan, Toby K. Boyson, Sean O'Byrne
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2020)
Article
Mechanics
Rongkang Gao, Sean O'Byrne, Felix Sharipov, Jong-Leng Liow
Proceedings Paper
Computer Science, Theory & Methods
Laurent M. Le Page, Matthew Barrett, Sean O'Byrne, Sudhir L. Gai
31ST INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS (RGD31)
(2019)
Proceedings Paper
Computer Science, Theory & Methods
S. L. Gai, R. Prakash, A. Khraibut, L. Le Page, S. O'Byrne
31ST INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS (RGD31)
(2019)
Proceedings Paper
Physics, Applied
Ernest. E. S. Ong, Sean O'Byrne, Jong-Leng Liow
PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON APPLIED SCIENCES (ICAS-2)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
Arthur Dogariu, Benjamin M. Goldberg, Sean O'Byrne, Richard B. Miles
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2017)