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Olena Monchenko,Yelyzaveta Kutniak,Hanna Martyniuk,Nadiia Marchenko
Pág. 72 - 79
A universal mathematical model of a noise signal in pipeline systems from the point of its origin to the observation point was presented. Due to the indicator function introduced into it, the model makes it possible to use different types of components a...
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Xianghua Chen, Wenxin Chen, Liyuan Zhao and Yekai Chen
The rapid pace of urbanization has led to an increasing frequency of road collapses, posing a significant threat to urban traffic safety. Underground pipeline leakage stands out as the primary cause of such collapses. This paper presents a macroscopic an...
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Chuanbo Cui, Zhipeng Jiao, Yuying Zhou, Shuguang Jiang, Yanwei Yuan, Jiangjiang Li and Zhiqiang Song
Previous theories on coal spontaneous combustion (CSC) prevention and control mostly focused on how to improve the CSC-inhibiting effect instead of the failure of the inhibitors. Due to the influence of air leakage in the goaf, the inhibitors and the wat...
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Fei Tan, Wufeiyu Tan, Feifei Yan, Xin Qi, Qinghua Li and Zhikai Hong
Urban ground collapse is a common geological disaster characterized by its invisible nature, particularly in China, and results in significant socioeconomic losses and even loss of life. Underground pipeline breakage is the most common factor leading to ...
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Shuli Hong, Jun Chi, Xin Xiang and Weiyu Lu
A centrifugal compressor of a micro turbine generator system is investigated by the theoretical model and numerical analysis to explore the characteristics of the tip leakage vortex as the centrifugal compressor approaches stall. The numerical simulation...
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Jinbang Cai, Yue Su, Huan Shen and Yong Huang
A coupled model has been developed to simulate groundwater flow in fractured karst systems according to the complex geological and karst hydrogeological conditions of the dam site, where a 3D mathematical model based on Boussinesq equation was used to de...
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Yajian Wang, Yuyou Yang, Fei Su and Linbing Wang
This study could provide a shield lining joint leakage calculation and analysis model.
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Da Yu, Keren Dai, Jinming Zhang, Benqiang Yang, He Zhang and Shaojie Ma
In recent years, penetrating weapons have been used more and more to attack increasingly hard targets; therefore, the impact of such a penetrating process has increased to an extremely high level. As an important component of a fuze, the reliability of t...
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Giulio Cantini, Simone Salvadori, Massimiliano Insinna, Giorgio Peroni, Gilles Simon, Duccio Griffini and Raffaele Squarcini
Regenerative pumps are characterized by a low specific speed that place them between rotary positive displacement pumps and purely radial centrifugal pumps. They are interesting for many industrial applications since, for a given flow rate and a specifie...
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Jiazheng Lu, Pengkang Xie, Zhen Fang and Jianping Hu
Metal-oxide arresters (MOAs) are used to absorb the electrical energy resulting from overvoltages in power systems. However, temperature rises caused by the absorbed energy can lead to the electrothermal failure of MOAs. Therefore, it is necessary to ana...
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Kazeem B. Adedeji, Yskandar Hamam, Bolanle T. Abe, Adnan M. Abu-Mahfouz
Pág. 1 - 21
Water loss through leaking pipes constitutes a major challenge to the operational service of water utilities. In recent years, increasing concern about the financial loss and environmental pollution caused by leaking pipes has been driving the developmen...
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Kazeem B. Adedeji, Yskandar Hamam, Bolanle T. Abe and Adnan M. Abu-Mahfouz
Water loss through leaking pipes constitutes a major challenge to the operational service of water utilities. In recent years, increasing concern about the financial loss and environmental pollution caused by leaking pipes has been driving the developmen...
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Ghaleb Hoblos and Mourad Benkaci
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O. M. Pshinko,L. V. Amelina,M. M. Bilyaev
Pág. 181 - 186
The 2D numerical model was developed and used to simulate river pollution after accident on the ammonia pipe over Dnipro River. The model is based on the numerical integration of the K-gradient transport model and potential flow. The results of numerical...
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Te-Kwei Wang, Yu-Hsun Lin, Jian-Yuan Shen
Pág. 169 - 180
This research proposes an artificial intelligence (AI) detection model using convolutional neural networks (CNN) to automatically detect gas leaks in a long-distance pipeline. The change of gap pressure is collected when leakage occurs in the pipeline, a...
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Qingmin Hou and Weihang Zhu
Small leaks in natural gas pipelines are hard to detect, and there are few studies on this problem in the literature. In this paper, a method based on the extended Kalman filter (EKF) is proposed to detect and locate small leaks in natural gas pipelines....
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Ilya Ostanin, Zahie Anka and Rolando Di Primio
Hydrocarbon prospectivity in the Greater Barents Sea remains enigmatic as gas discoveries have dominated over oil in the past three decades. Numerous hydrocarbon-related fluid flow anomalies in the area indicate leakage and redistribution of petroleum in...
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Nuno Santos, Miguel Chaves, Paulo Gamboa, Armando Cordeiro, Nelson Santos and Sónia Ferreira Pinto
This paper focuses on the study of the high frequency transformer incorporated in solid- state transformers, specifically on the development of the steps that enable the design of an optimized high frequency transformer and its equivalent model based on ...
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Yong Liu, Hao Du, Xinjiang Ren, Baichun Li, Junze Qian and Fangchao Yan
Due to the complexity of sealing surface topography, it is difficult to take the surface topography into consideration when building a leakage rate model theoretically. Therefore, a theoretical model for estimating the leakage rate of metal-to-metal seal...
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Chao Zhong, Lulu Zhai, Jia Guo, Baoling Cui and Guoyou Chen
This paper proposes a new solution method for the leakage and static characteristics of smooth annular seal under a homogeneous gas-liquid two-phase flow based on a bulk-flow model. In this solution method, the Rayleigh?Plesset equation is introduced int...
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