Article
Chemistry, Physical
Yuelei Zhang, M. Barzegar Gerdroodbary, Saleh Hosseini, A. M. Abazari, Zhixiong Li
Summary: The research applies a computational method to examine the impacts of coaxial hybrid air and fuel jets on fuel mixing at supersonic cross-flow, revealing significant improvement in fuel penetration and mixing inside the combustion chamber. The study also confirms that the coaxial injector enhances the spiral feature of the fuel jet, promoting fuel mixing downstream and increasing circulation strength in far away from an injector.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Mechanics
Yakang Kong, Yun Wu, Haohua Zong, Shanguang Guo
Summary: This paper presents an experimental study on supersonic cavity flow control using a spanwise pulsed spark discharge array (SP-PSDA), focusing on its control effect and underlying mechanism. Results show that the SP-PSDA induces thermal bulbs, causing wave-like oscillation in the shear layer. The study finds that SP-PSDA actuation at 5 kHz has a better control effect and enhances the whole hairpin structure's I Rms. Proper orthogonal decomposition reveals the coupling of thermal bulbs with the shear layer to form large-scale coherent structures that excite the Kelvin-Helmholtz instability.
Article
Chemistry, Physical
Z. Li, Gautam Choubey, Hosam A. Saad, Awad Musa, Yuelei Zhang, Chenggang Hu
Summary: This article investigates the impact of fuel injection systems in the combustion chamber on the overall thrust efficiency of high-speed vehicles. It reveals that the 3-lobe nozzle is more efficient than other styles and the circular jet has a higher mixing productivity compared to other cases.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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
Engineering, Multidisciplinary
Huijuan Zhang, Lanxia Guo, Biao Xie, Tao Huang, Jinlan Tan
Summary: Improving the fuel mixing in a scramjet engine is crucial for increasing flight speed. This study investigates the importance of using an extruded single lobe-nozzle to enhance fuel mixing in the combustion chamber. Computational techniques are used to analyze the effects of different injector types and the height of the extruded lobe injector on shock interaction and fuel mixing. The study concludes that the lobe injector improves fuel mixing more efficiently behind the nozzle, while a circular nozzle is efficient for fuel mixing far downstream of the injector.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Energy & Fuels
M. Barzegar Gerdroodbary, R. Moradi, Houman Babazadeh
Summary: This study investigates the influence of free stream angles on fuel mixing in scramjet design, showing that a positive angle can lead to more uniform expansion of the fuel mixing zone. Increasing the angles of the free stream reduces the mixing zone when the fuel jet interaction decreases, with a mixing efficiency of -20 degrees about 30% more than other angles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Fuzhang Wang, Hasan Sh. Majdi, Hayder A. Dhahad, Taher A. Nofal, Awad Musa
Summary: This paper investigates the effect of an upstream oblique ramp on the fuel mixing process of hydrogen multi-jets in supersonic cross airflow. The results show that the presence of the oblique ramp significantly enhances fuel mixing, and the productivity of the divergent ramp is higher than that of the convergent ramp.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Aerospace
A. A. Dhankarghare, T. Jayachandran, T. M. Muruganandam
Summary: This study combines a strut and a cavity into a strut cavity and compares it with a wall cavity using numerical simulations at different Mach numbers and aspect ratios. The results show that the wall cavity is more prone to oscillations compared to the strut cavity. The generation process of waves inside the cavity is revisited, where both the unstable shear layer and vortex shedding contribute to the wave generation in supersonic flows.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Xiaoling Shi, Dunlan Song, Hui Tian, As'ad Alizadeh, Masood Ashraf Ali, Mahmoud Shamsborhan
Summary: Comprehensive computational investigations have been conducted to examine the role of an annular air jet on fuel mixing in the combustion chamber. The results show that the injection of the annular jet can enhance circulations and improve fuel mixing inside the chamber.
Article
Thermodynamics
Z. Li, Jiaxuan Leng, Nidal H. Abu-Hamdeh, Khaled O. Daqrouq, Awad Musa, Osama K. Nusier
Summary: The effects of lateral injection from the circular strut on the fuel mixing and distributions in a scramjet engine for high-speed flight are comprehensively investigated using computational fluid dynamics (CFD). The results show that the circulation factor is reduced and the mixing performance is improved when the single cross jet is replaced by the lateral injection system or when the strut height of lateral injection is increased. Furthermore, replacing the single normal injection with a lateral nozzle located on a circular strut significantly improves the mixing performance behind the injector.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Aerospace
Guangli Fan, Hassan Abdulwahab Anjal, Raed Qahiti, Nidal H. Abu-Hamdeh, Abdullah M. Abusorrah, Jin Xu, Hailong Zhang, Zhixiong Li
Summary: This article investigates the impacts of orifice shape on the mixing mechanism of fuel jets into the supersonic air stream of Mach=4, showing that the mixing efficiency of the 3-lobe injector is about 25% more than that of the 2-lobe and 4-lobe injectors.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Shanshan Shang, Guangwu Sun, Zikai Yu, As'ad Alizadeh, Masood Ashraf Ali, Mahmoud Shamsborhan
Summary: In this research, the usage of an extruded annular nozzle for fuel mixing in the combustion chamber was investigated. The focus was on studying the flow of the fuel jet using three-dimensional simulation. The study connected the mass diffusion mechanism with the fuel mixing of the jet released from the extruded nozzle. The results showed that injecting fuel through the extruded nozzle improved fuel mixing performance in the combustor, especially with the use of coaxial fuel and air jets.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yaohui Li, Guanghui Zhu, Yanpu Chao, Liangbin Chen, As 'ad Alizadeh
Summary: This study aimed to investigate a novel jet configuration to enhance fuel mixing in the combustion chamber. Computational fluid dynamics was used to analyze the three-dimensional structure of the fuel jet released from an extruded nozzle. The results showed that the use of an annular circular nozzle efficiently improved fuel mixing, and increasing the height of the 3-lobe injector enhanced fuel mixing by approximately 90%.
Article
Thermodynamics
Dian Huang
Summary: This study investigates the use of multi-nozzles with varying heights in supersonic combustion chambers of scramjets to enhance fuel mixing and distribution. Computational fluid dynamics is used to analyze the impact of different injector height configurations on supersonic cross-flow and evaluate the flow and fuel mixing efficiency. The findings suggest that multi-jet injectors with different heights can significantly improve fuel mixing downstream.
Article
Engineering, Aerospace
Guangli Fan, Adel Almarashi, Peixi Guo, Nidal H. Abu-Hamdeh, Abdullah M. Abusorrah, R. Moradi
Summary: The study investigates the impacts of high-velocity air stream interacting with cross fuel jet on fuel mixing and flame stability. Computational fluid dynamic method is used to model the flow structure, revealing that adding an inclined ramp upstream can enhance fuel mixing effectiveness and distribution uniformity.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
S. Z. Feng, Y. C. Guo, Grzegorz Krolczyk, Xu Han, Atilla Incecik, Zhixiong Li
Summary: A computational approach is developed for multi-physics modelling of IGBT module, considering the coupling effect between electrical, thermal, and mechanical fields. The approach utilizes tetrahedral elements to construct an efficient IGBT model using the finite element method. The results demonstrate that the proposed approach achieves higher accuracy, convergence, and computing efficiency compared to popular methods, providing an efficient tool for the IGBT multi-physics coupling problem.
ADVANCES IN ENGINEERING SOFTWARE
(2023)
Article
Mechanics
Shiwei Liu, Gaoliang Peng, Zhixiong Li, Weihua Li, Kang Jin
Summary: This paper investigates the application potential of origami metamaterials in advanced deployable mechanisms, intelligent robots, and energy absorption devices. It embeds flexible joints with metamaterial properties into the origami metamaterial structure, enabling simultaneous geometric nonlinearity and joint stiffness nonlinearity. The nonlinear stiffness characteristics of this composite metamaterial are examined in detail.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Xiaoqiang Guo, Xinhua Liu, Xu Zhang, Grzegorz M. Krolczyk, Paolo Gardoni, Zhixiong Li
Summary: The powerful belt conveyor is crucial for coal mining transportation, and its stable operation is essential for efficiency. Machine vision-based damage detection systems are widely studied and deployed, but capturing high-quality images in the harsh underground coal seam environment is difficult. To solve this issue, an image denoising and enhancement approach based on invertible neural network (INN) is proposed. The proposed model, called denoising INN (DeINN), demonstrates excellent image denoising ability and outperforms existing methods.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Interdisciplinary Applications
Asal Sadeh, Admin Kazemi, Moharam Bahramkhoo, M. Barzegar Gerdroodbary
Summary: Blood hematocrit, porosity, and blood viscosity have significant impacts on the risk of aneurysm rupture, and computational fluid dynamic simulations are reliable tools for recognizing high-risk regions and assessing aneurysm status.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Multidisciplinary Sciences
Sajad Salavatidezfouli, Asad Alizadeh, M. Barzegar Gerdroodbary, Amir Sabernaeemi, Amir Musa Abazari, Armin Sheidani
Summary: This study investigates the stent-induced deformations of the parent vessel of ICA aneurysms and their impact on blood flow and hemodynamic factors. Computational fluid dynamics with one-way Fluid-Solid interaction approach are used to simulate the non-Newtonian blood flow. The results show that the deformation of the aneurysm restricts blood entrance to the sac region and decreases blood velocity and oscillatory shear index (OSI) on the sac wall. It is also observed that the stent-induced deformation is more significant in cases with higher OSI values on the aneurysm wall.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Asal Sadeh, Admin Kazemi, Moharam Bahramkhoo, M. Barzegar Gerdroodbary
Summary: The aim of this study is to investigate the potential region for rupture and hemorrhage inside the MCA aneurysm through the simulation of blood hemodynamics. It mainly focuses on disclosing the impacts of endovascular coiling on blood hemodynamics and the risk of aneurysm rupture. The computational study of blood flow is conducted by solving the Navier-Stokes equations assuming laminar, unsteady, and non-Newtonian flow. The influences of blood hematocrits and coiling porosity are also examined, with results showing limited impacts of blood hematocrit on the maximum OSI in the MCA case.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
Yuansheng Cheng, Zhixiong Li, Grzegorz M. Krolczyk, Chunsheng Yang, Ruqiang Yan
Summary: Vibration measurement is crucial for monitoring and controlling vibrations. Noncontact vibration measurement is more practical than contact methods, but noncontact methods often require a high standard of the light field environment. To solve this problem, a new binocular vision method is proposed, which allows noncontact vibration measurement in different light fields. This method first recognizes multitarget objects in the same image using a YOLOv5 model, generating bounding boxes. A depth image is generated through binocular vision and kept synchronized with the target image. An optimal depth value decision algorithm is developed to determine the 3-D real-time coordinates of each object based on the bounding box and its corresponding depth image. As a result, vibrations of multitarget objects can be measured simultaneously. Experimental tests show accurate results and the ability of the proposed noncontact method to detect very low-frequency vibrations.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Shizhe Feng, Qingjian Sun, Yang Wu, Xu Han, Zhixiong Li, Miguel Angel Sotelo
Summary: A thermal-structural-electromagnetic coupling model is proposed for the stochastic analysis of active phased array antenna performance. The model considers random material parameters and uses stochastic perturbation technique to analyze temperature distribution, thermal deformation, and electromagnetic performance. The results show that the model provides accurate stochastic multiphysics information and reduces computational cost compared to the Monte Carlo method.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Civil
Hai Wang, Le Tao, Yingfeng Cai, Long Chen, Yicheng Li, Miguel Angel Sotelo, Zhixiong Li
Summary: In this paper, a single-stage anchor-free 3-D object detector algorithm called CenterPoint-SE is proposed, which enhances the spatial perception ability of anchor-free detection networks based on CenterPoints. An efficient 3-D backbone network is constructed to extract fine-grained spatial geometric features, and a powerful spatial semantic feature fusion module called EF-Fusion is designed. Various improvements, including a lightweight IoU prediction branch and a foreground point segmentation auxiliary training branch, are added to enhance the algorithm's performance.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Industrial
Mengmeng Wang, Atilla Incecik, Shizhe Feng, M. K. Gupta, Grzegorz Krolczyk, Z. Li
Summary: A new digital twin (DT) framework with optimal sensor placement (OSP) is proposed, which accurately calculates the modal responses and identifies the damage ratios of offshore jacket platforms. The framework consists of an OSP model and a damage identification model. The OSP model optimizes the sensor number/location using the multi-objective Lichtenberg algorithm (MOLA) to balance the sensor cost and modal calculation accuracy. The damage identification model uses the Markov Chain Monte Carlo (MCMC)-Bayesian method to calculate the structural damage ratios based on modal information obtained from sensory measurements, considering the uncertainties of structural parameters. The method is validated using an offshore jacket platform, demonstrating efficient identification of structural damage location and severity.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Thermodynamics
M. Barzegar Gerdroodbary, M. Jafaryar, M. Sheikholeslami, Y. Amini
Summary: The impact of non-uniform Kelvin force on the thermal properties of ferro nanoparticles in heat exchangers is investigated using computational technique. The study reveals the influence of variable MHD on the hydrothermal characteristics of a screw heat exchanger with nanofluid flow. The findings highlight the significant role of geometrical parameter, Reynolds number and magnetic field on the thermal efficiency of the screw heat exchanger.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Acoustics
Lai Peng, Dezheng Hua, Xinhua Liu, Darius Andriukaitis, Grzegorz Krolczyk, Zhixiong Li
Summary: An active fluid-film bearing lubricated with magnetorheological fluid (MRF) is proposed to address the problems of insufficient load capacity and rotor vibration. The study designs the geometry of the MRF fluid-film bearing, analyzes its intelligent lubrication mechanism, and verifies the method's validity through numerical simulation. The simulation results show that the MRF bearing has the ability to suppress rotor vibration and the IGWO-PID controller has better response characteristics than other algorithms.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Computer Science, Artificial Intelligence
Kuosheng Jiang, Chengsong Zhang, Baoliang Wei, Zhixiong Li, Orest Kochan
Summary: The operating conditions of RV reducer are complex and the fault signal sample is small. An improved DNCNN denoising algorithm is proposed to realize the failure mode recognition of RV reducer, and experimental analysis shows its effectiveness.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Computer Science, Information Systems
Xiaogang Li, Wei Rao, Dahui Lu, Jianhua Guo, Tianwen Guo, Darius Andriukaitis, Zhixiong Li
Summary: An automated guided vehicle obstacle avoidance system based on the grid method and deep learning algorithm is proposed. It effectively detects and avoids obstacles in a complex and dynamic environment, improving the transportation efficiency and reducing the average execution time of tasks in a simulated tobacco production workshop.
Article
Computer Science, Artificial Intelligence
Baiyi Wang, Zipeng Zhang, Patrick Siarry, Xinhua Liu, Grzegorz Krolczyk, Dezheng Hua, Frantisek Brumercik, Z. Li
Summary: The African vultures optimization algorithm (AVOA) has some shortcomings in solving complex problems. To address these issues, a nonlinear African vulture optimization algorithm (HWEAVOA) is proposed, which outperforms other algorithms in terms of convergence speed, optimization ability, and solution stability, according to experimental results.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
