Article
Materials Science, Composites
Xiangteng Ma, Fusheng Wang, Zhen Wang, Yan Li, Bin Xu
Summary: This paper studies the coupling mechanism between lightning channel and composite material by establishing a Magneto Hydro Dynamics (MHD) model. The results show the characteristics of current flow, magnetic field contours, and damage morphology. The mutual relationship between lightning damage morphology and lightning channel evolution is also investigated.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Mathematics
Victor V. Kuzenov, Sergei V. Ryzhkov, Aleksey Yu. Varaksin
Summary: This paper discusses the numerical simulation of the interaction between the cocurrent stream and the combustion products from a solid fuel rocket engine (SFRE). A single calculation methodology is used to describe gas-dynamic processes, and a hybrid computational grid is applied to calculate gas flow near complex geometric shapes. The simulation of the main phase of interaction in the Earth's atmosphere has been conducted.
Article
Engineering, Marine
Zhijian Wu, Li Guo
Summary: This study presents an improved iterative velocity correction scheme that combines the single-phase free surface-lattice Boltzmann method with the immersed boundary method to simulate the impact of aircraft ditching on water entry. The model accurately simulates various phenomena in gas-liquid-solid multi-physical field conditions and prevents particle penetration by correcting the boundary force and implementing an improved scheme. The accuracy of the FS-LBM-IB method in predicting the secondary head-up of the aircraft under suction force is confirmed through benchmark tests and scaled model simulations.
Article
Construction & Building Technology
Huayuan Zhou, Ke Zhong, Hongwei Jia, Yanming Kang
Summary: This study compares the numerical performances of dynamic mesh update methods provided by ANSYS FLUENT in predicting the flow induced by moving objects indoors, discussing five aspects including accuracy, mesh quality, mesh generation complexity, continuity, and computational efficiency.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Electrical & Electronic
Xuan Deng, Yueming Wang, Guicheng Han, Tianru Xue
Summary: This paper proposes a method for measuring the radiation characteristics of an aircraft engine's hot parts and skin using a cooled middle-wave infrared camera. The method corrects the atmospheric transmission model, establishes an absolute radiation correction model, and calculates the temperature inversion equation. The experimental results show that the method is effective for infrared target temperature inversion.
Article
Engineering, Civil
Chuxuan Tang, Zheng Lu, Hailin Yao, Shuan Guo, Yukun Han
Summary: This paper semi-analytically studies the dynamic vibrations of airport runways induced by moving aircraft loads and finds that soil saturation has a crucial impact on the vibration characteristics.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Chris Chartrand, J. Blair Perot
Summary: This paper presents a new method for generating locally orthogonal polygonal meshes from a set of generator points, considering polygon areas as a constraint. The method can be used for particle-based numerical computations and has advantages in incompressible fluid flow calculations.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Marine
Xin-Yang Ju, Peng-Nan Sun, Yan-Ming Shen, Jian-Qiang Chen, A. -Man Zhang
Summary: Researchers used the Delta+-SPH model to simulate and analyze the load and motion characteristics of a spacecraft ditching on water surface. They found that the attitude angles and impact velocities of the spacecraft have an influence on the slamming load and stability during the ditching process. It is important to carefully consider and avoid large inclination angles and vertical velocities to prevent overturning in engineering design.
Article
Multidisciplinary Sciences
Dong Xu, Jianing Liu, Yunfeng Wu, Chunning Ji
Summary: We propose a simple and generalized Discretized Immersed Boundary Method (DIBM) that significantly improves efficiency by discretizing the interpolation functions and reusing a predefined universal interpolation stencil. DIBM achieves speedup ratios of 30-40 or even higher compared to conventional Immersed Boundary Method (IBM), with estimated errors below 1%.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Guang Hu, Qianfeng Liu
Summary: This study investigates the characteristics of the HEMP radiation field on a typical transport aircraft using the frequency sweep method. The induced electric field strength E(t) is found to vary greatly at different positions and usually exceeds the initial peak value of electric field strength E-0. The research provides guidance and insights for the protection design of HEMP on aircraft.
APPLIED SCIENCES-BASEL
(2021)
Article
Geochemistry & Geophysics
Xuwen Tian, Hongbin Xiao, Zixiang Li, Zhenyu Li, Huanyu Su, Qianwen Ouyang
Summary: This paper investigates the effect of the microbially induced calcite precipitation (MICP) method on the strength characteristics of expansive soils through a series of CD triaxial tests. The results show that the MICP method can significantly improve the shear strength index of the expansive soils. The stress-strain relationship of the improved soils can be described by a hyperbolic model, and the predicted results are in good agreement with the measured results. Additionally, a scanning electron microscope experiment reveals the mechanism of the MICP method in improving the strength characteristics of expansive soils.
Article
Engineering, Industrial
Hongwei Zhu, Zhiqiang Lu, Chenyao Lu, Yifei Ren
Summary: This paper addresses a reactive scheduling problem of aircraft moving assembly line with uncertain material delivery, and proposes a SVDD-based method for training and decision making using machine learning models. Experimental results show that the method can quickly respond to disturbances and produce high-quality solutions.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2021)
Article
Engineering, Multidisciplinary
M. B. Almatrafi, Abdulghani Alharbi, Kh Lotfy, A. A. El-Bary
Summary: The main objective of this article is to investigate the analytical and numerical solutions of the Generalized Benjamin-Bona-Mahony (GBBM) equation, and compare the performance of different methods. The exact solution is obtained analytically, while numerical solutions are demonstrated using various techniques. 2D and 3D surfaces are shown under suitable parameter selection to compare exact and numerical solutions.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Remote Sensing
Isaac Levi Henderson
Summary: Registration of unmanned aircraft is a common policy worldwide and this study examines the registration policies of advanced economies. New Zealand is used as a case study, where a registration scheme is being considered. The study's findings suggest that for New Zealand, it would be more effective to register users and organizations instead of individual aircraft. Further research is needed worldwide to understand the relationship between registration schemes and ownership data.
Article
Mathematics, Interdisciplinary Applications
Patricia Tonon, Rodolfo Andre Kuche Sanches, Kenji Takizawa, Tayfun E. Tezduyar
Summary: This article introduces two excellent moving mesh methods, ST and ALE, and discusses the recently introduced BCBMM and HCBMM methods in detail. Test computations with finite element meshes show that these methods perform well, avoiding cycle-to-cycle accumulated mesh distortion.
COMPUTATIONAL MECHANICS
(2021)
Article
Automation & Control Systems
Yingqi Zhang, Peng Shi, Ramesh K. Agarwal, Yan Shi
INTERNATIONAL JOURNAL OF CONTROL
(2020)
Article
Thermodynamics
Simin Shen, Zhongdong Qian, Bin Ji, Ramesh K. Agarwal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2019)
Article
Mechanics
Z. Jiang, W. Zhao, W. Chen, R. K. Agarwal
Article
Energy & Fuels
Yi Ouyang, Yang Xiang, Xue-Ying Gao, Hai-Kui Zou, Guang-Wen Chu, Ramesh K. Agarwal, Jian-Feng Chen
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2019)
Article
Engineering, Chemical
Hao Chang, Ramesh K. Agarwal, Wei Li, Ling Zhou, Weidong Shi
Article
Thermodynamics
Qiongyao Qin, Ramesh Agarwal, Xiaobing Zhang
COMBUSTION AND FLAME
(2019)
Article
Thermodynamics
Ling Zhou, Kartik Deshpande, Xiao Zhang, Ramesh K. Agarwal
Article
Engineering, Mechanical
Weidong Cao, Wei Li, Leilei Ji, Weidong Shi, Zhanxiong Lu, Ramesh K. Agarwal
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2019)
Article
Automation & Control Systems
Ge Song, Peng Shi, Ramesh K. Agarwal
Summary: This article addresses the problem of event-triggered-based fixed-time sliding mode cooperative control for leader-follower multiagent networks with bounded perturbation. A terminal integral sliding mode manifold with fast convergent speed is designed, and a distributed consensus tracking control strategy based on event-triggered and sliding mode control is developed to guarantee consensus within a fixed time. The proposed event-triggered control algorithm reduces the update frequency of control law and eliminates Zeno behavior, as demonstrated through simulation examples.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Shiqi Zheng, Peng Shi, Ramesh K. Agarwal, Chee Peng Lim
Article
Engineering, Electrical & Electronic
Wen Xing, Peng Shi, Ramesh K. Agarwal, Liya Li
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2020)
Article
Computer Science, Artificial Intelligence
Qikun Shen, Peng Shi, Ramesh K. Agarwal, Yan Shi
Summary: This study examines the filter design problem of nonlinear systems and proposes a new adaptive neural network-based filter design method, which can effectively estimate system states and unknown time delays, overcoming the drawback of having unknown time delays in the designed filters. Simulation results demonstrate the effectiveness of the proposed new design method.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2021)
Article
Environmental Sciences
Shuo Li, Wei Li, Leilei Ji, Weidong Shi, Ramesh K. Agarwal
Summary: By establishing a multi-region dynamic slip method, the internal flow characteristics of the mixed-flow pump under the Alford effect were studied. Numerical predictions using ANSYS Fluent software showed that eccentricity significantly impacted the flow field in the blade tip area and led to increased vortex core strength in the impeller's small gap area, causing flow instability and energy loss. The research also found that eccentricity increased the strength and number of vortex core structures in the guide vane, leading to flow separation near the impeller's eccentric side.
Article
Engineering, Electrical & Electronic
Wei Li, Shuo Li, Leilei Ji, Xiaofan Zhao, Weidong Shi, Ramesh K. Agarwal, Muhammad Awais, Yang Yang
Summary: This paper utilizes CFD analysis technology to study the cavitation performance and pressure pulsation characteristics of an LNG submerged pump, and quantitatively analyzes the effect of cavitation on low-frequency pulsation. The results show that an increase in flow rate leads to stronger and periodic pressure pulsation in the impeller, while the amplitude decreases.
Article
Physics, Fluids & Plasmas
Xiang Zhang, Ramesh K. Agarwal
