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Numerical investigation to evaluate the effects of gravity and pressure on flame structure and soot formation of turbulent non-premixed methaneair flame

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Propulsion and Power Research 2022年第4期11卷 473-495页

作者： Subrat Garnayak Amjad Ali Pasha Radi Alsulami Medhat A.Nemitallah Abdul Gani Abdul Jameel Sukanta K.Dash V.Mahendra Reddy School of Energy Science&Engineering Indian Institute of Technology KharagpurWest Bengal721302India department of Aerospace Engineering King Abdulaziz UniversityJeddah21589Saudi Arabia department of Mechanical Engineering King Abdulaziz UniversityJeddah21589Saudi Arabia IRC-Hydrogen and Energy storage and Mechanical Engineering department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia department of Chemical Engineering King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Center for Refining&Advanced Chemicals King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia department of Mechanical Engineering Indian Institute of Technology KharagpurWest Bengal721302India

In this study,a turbulent non-premixed(diffusion)methane-air flame has been investigated computationally to analyze the influences of pressure and gravity on flame structure and sooting characteristics between 1 and 10 *** simulation has been conducted in a 2-D axisymmetric computational domain using the finite volume-based computational fluid dynamics(CFD)*** interaction of turbulence and chemistry is modeled by considering the steady laminar flamelet model(SLFM)and the GRI Mech 3.0 chemical *** radiative heat transfer calculation is carried out by considering the discrete ordinate(DO)method and the weighted sum grey gas model(WSGGM).The semi-empirical Moss-Brookes model is considered to calculate *** impact of gravity on flame and sooting characteristics are evaluated by comparing the normal-gravity flames with the zero-gravity *** effect of soot and radiation on flame temperature is also *** results show a close agreement with the measurement when both soot and radiation are included in the numerical *** rates of soot formation,surface growth,and oxidation increase with increased operating pressure,regardless of ***-gravity flames have a higher soot volume fraction,a wider soot-containing zone,a higher CO mass fraction,and a lower flame temperature than normal-gravity flames while maintaining constant *** normal-gravity flames,the CO mass fraction decreases with pressure,whereas it increases with pressure rise in flames of zero *** of zero gravity appear taller and broader compared to the flames of normalgravity for a fixed *** increase in pressure significantly reduces the flame length and width in normal-gravity ***,the pressure elevation has little effect on the shape of a zero-gravity *** outcomes of the present study will assist in fully understanding the combustion and sooting characteristics of turbulent diffusion flames that will help design and develop h

关键词： Computational fluid dynamics(CFD) Flamelet Gravity Pressure Soot

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Leak Detection of Gas Pipelines Based on Characteristics of Acoustic Leakage and Interfering Signals

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Sound & Vibration 2019年第4期53卷 111-128页

作者： Lingya Meng Cuiwei Liu Liping Fang Yuxing Li Juntao Fu College of Information and Control Engineering China University of PetroleumQingdaoChina. Provincial Key Laboratory of Oil and Gas storage and transportation Safety University of PetroleumQingdaoChina. China SINOPEC Natural Gas Corporation BeijingChina.

When acoustic method is used in leak detection for natural gas pipelines,the external interferences including operation of compressor and valve,pipeline knocking,etc.,should be distinguished with acoustic leakage signals to improve the accuracy and reduce false *** this paper,the technologies of extracting characteristics of acoustic signals were *** acoustic leakage signals and interfering signals were measured by experiments and the characteristics of time-domain,frequency-domain and time-frequency domain were *** main characteristics of time-domain are mean value,root mean square value,kurtosis,skewness and correlation function,*** features in frequency domain were obtained by frequency spectrum analysis and power spectrum density,while time-frequency analysis was accomplished by short time Fourier *** results show that the external interferences can be removed effectively by the characteristics of time domain,frequency domain and time-frequency *** can be drawn that the acoustic leak detection method can be applied to natural gas pipelines and the characteristics can help reduce false alarms and missing alarms.

关键词： Leak detection acoustic method signal processing external interference characteristic extraction

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Unsteady Flow and Heat Transfer of a Casson Micropolar Nanofluid over a Curved Stretching/Shrinking Surface

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Fluid Dynamics & Materials Processing 2023年第2期19卷 471-486页

作者： Muhammad A.Sadiq Nadeem Abbas Haitham M.S.Bahaidarah Mohammad Amjad department of Mathematics DCC-KFUPMDhahran31261Saudi Arabia Interdisciplinary Research Center for Hydrogen and Energy storage KFUPMDhahran31261Saudi Arabia department of Mathematics Riphah International UniversityFaisalabad CampusFaisalabad38000Pakistan Mechanical Engineering department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia department of Mathematics AIR UniversityIslamabad44000Pakistan

We present the results of an investigation into the behavior of the unsteady flow of a Casson Micropolar nanofluid over a shrinking/stretching curved surface,together with a heat transfer analysis of the same *** body force acting perpendicular to the surface wall is in charge of regulating the fluid flow *** coordinates are used to account for the considered curved geometry and a set of balance equations for mass,momentum,energy and concentration is obtained *** are turned into ordinary differential equations using a similarity *** show that these equations have dual solutions for a number of different combinations of various *** stability of such solutions is investigated by applying perturbations on the steady *** is found that high values of the Micropolar and Casson parameters cause the flow to move more ***,when compared to a shrunken surface,a stretched surface produces a greater Micro-rotation flux.

关键词： Dual solutions Micropolar Casson fluid curved surface perturbation eigen values

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Prediction Model of Refined Gasoline Blending Formula Based on PSO-DBN

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China petroleum Processing & Petrochemical Technology 2022年第3期24卷 128-138页

作者： Wang Xiaoming Li Wei Li Yajie Jiang Dongnian Liang Chenglong School of Future Techrology South China University of TechnologyGuangzhou 510641 Pengcheng Laboratory Shenzhen 518000 College of Electrical and Information Engineering Lanzhou University of TechnologyLanzhou730050 Oil storage and transportation Plant PetroChina Lanzhou Petrochemical CompanyLanzhou730060

To address the problem of the low accuracy of refined gasoline blending formula in the petrochemical industry,the advantages of deep belief networks(DBNs)in feature extraction and nonlinear processing are considered,and they are applied to the prediction modeling of refined gasoline blending conservative ***,based on historical measured data of refined gasoline blending and according to the characteristics of the data set,we use bootstrapping to divide the training data set and the test data ***,considering that parameter selection for the network is difficult,particle swarm optimization is adopted to improve the related optimal parameters and replace the tedious process of manually selecting parameters,greatly improving optimization *** addition,the contrastive divergence algorithm is used for unsupervised forward feature learning and supervised reverse fine-tuning of the network,so as to construct a more accurate prediction model for conservative ***,in order to evaluate the effectiveness of this method,the simulation results are compared with those of traditional modeling methods,which show that the DBNs has better prediction performance than error back propagation and support vector machines,and can provide production guidance for refined gasoline blending formula.

关键词： formulation prediction deep belief network contrastive divergence particle swarm optimization

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Occurrence Characteristics of Saline-Lacustrine Shale-Oil in the Qianjiang Depression,Jianghan Basin,Central China

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Journal of Earth Science 2022年第4期33卷 945-962页

作者： Zhongliang Sun Zhiliang He Furong Wang Yuanjia Han Sheng He Yuguang Hou Jing Luo Youheng Zheng Shiqiang Wu Wuxi Research Institute of petroleum Geology Petroleum Exploration and Production Research InstituteSINOPECWuxi 214126China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China department of Science and Technology China Petroleum and Chemical CorporationBeijing 100728China Key Laboratory of Tectonics and petroleum Resources China University of GeosciencesWuhan 430074China Research Institute of petroleum Exploration and Development Jianghan Oilfield Branch CompanySINOPECWuhan 430223China

The amount of shale oil and its characterization are key issues in the study of shale *** present,many scholars use a variety of methods to evaluate the amount of shale oil,and use the calculated amount of hydrocarbons to analyze its influencing factors;however,there is lack of detailed research on the storage space for shale-oil and it’s influencing *** view of this issue,gas chromatography(GC),gas chromatography-mass spectrometry(GC-MS),soxhlet extraction(SE),fieldemission scanning electron microscopy(FE-SEM),low-temperature nitrogen adsorption(LTNA),highpressure mercury intrusion(HPMI),and X-ray diffraction(XRD)were used to analyze and compare samples from two wells located in different deposition *** unconventional Well BYY2 and BX7 s were drilled in the depocenter and distal area of the Qianjiang Formation,*** by differences in the organic matter type and sedimentary environment,the organic matter in Well BYY2,which was found to be characterized by laminar shale,mainly originated from aquatic *** results showed that as the total organic carbon(TOC)content increased,the amount of shaleoil in the pores ***-oil was mostly stored in mesopores and macropores that had been preserved by dolomite minerals of a biogenic origin and also occurred in pores sized 5–200 nm and>1μ*** minerals of a biogenic origin and clay minerals contributed to the occurrence of *** comparison,the organic matter in Well BX7 has been greatly influenced by terrestrial organic *** in the massive mudstones from Well BX7 were determined to be mainly mesopores preserved by clay minerals and quartz,and the shale-oil was mostly stored within the pores of<40 *** the TOC content was~2.5 wt.%,the generated shale-oil reached *** minerals contributed to the occurrence of shale-oil,whereas quartz only contributed to the occurrence of shale-oil in macropores.

关键词： shale oil reservoir storage space of shale oil saline lacustrine Jianghan Basin

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Mechanical behavior of salt rocks: A geomechanical model

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petroleum 2023年第4期9卷 508-525页

作者： Saeed Shad Negar Razaghi Davood Zivar Soheil Mellat department of Chemical and petroleum Engineering Sharif University of TechnologyTehranIran PanTerra Geoconsultants BV LeiderdorpNetherlands

The geomechanical behavior of salt rocks is a significant concern during drilling and development operations in some hydrocarbon reservoirs and underground gas storage *** this study,the static and dynamic salt rock geomechanical properties from a field in southwest Iran were evaluated using experiments such as waves'velocities,and thermo-mechanical coupled uniaxial and triaxial compression *** a result and by considering both the petrophysical well logs and laboratory data of the waves’velocities,it is observed that the elastic properties of the core samples are concentrated within a narrow range unless an abnormality causes *** results of uniaxial compression tests showed that rock strength decreases with increasing temperature *** addition,the reduction of rock strength was observed with increasing porosity of the core samples as *** the case of triaxial compression tests,applying confining pressure on the core sample caused an increment in rock strength,while temperature decreased rock *** temperature also increased cohesion and decreases friction *** ratio of changes in stress to strain was used to investigate the dynamic changes in the geomechanical *** maximum 0.25 damage factor was observed for the core samples for different definitions of the damage ***,we propose a novel analytical model to predict the stress-strain behavior of salt rocks at different *** model was validated using experimental results and indicated a satisfactory accuracy.

关键词： Salt rock Underground gas storage Geomechanics Dynamic and static mechanical properties Transition zone Damage factor

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Hydrolysis enhancing mechanisms of Mg-based alloys/hydrides from perspectives:Electrochemical corrosion,active sites,mass transfer,and kinetics

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Journal of Materials Science & Technology 2023年第32期163卷 1-16页

作者： Chaoling Wu Qin Huang Bingshou Gong Ji Zhou Guanghui Xia Fangnan He Yao Wang Yigang Yan Yungui Chen department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610042China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065China Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationChengdu 610064China Technology Innovation Center of Hydrogen storage-transportation and Fueling Equipments for State Market Regulation Chengdu 610000China

Hydrogen energy is considered to be an ideal new energy carrier in the 21st century due to its clean,environmentally friendly,renewable characteristics and high energy *** generation of hydrogen by hydrolysis of Mg-based alloys/hydrides has attracted extensive attention attributed to the high hydrogen yield,environmentally-benign by-products,high crust abundance,and well-developed industrial production of ***,in the hydrolysis process of Mg or MgH_(2)to generate hydrogen,the formed Mg(OH)_(2)passivation layer attaches to the surface of the active materials to prevent the reaction from *** improve the hydrolysis performance,a series of methods have been put *** this paper,focusing on the mechanisms of hydrogen generation by hydrolysis of Mg-based alloys/hydrides,we summarize the recent research progress from four different perspectives:electrochemical corrosion promotion by constructing galvanic cells,active sites increment by refining the particles,mass transfer enhancement by breaking Mg(OH)_(2)and corresponding kinetic improvement.

关键词： Hydrogen generation Hydrolysis Mg MgH2

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Iterative Learning Control Algorithm with a Fixed Step

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Chinese Journal of Mechanical Engineering 2011年第4期24卷 669-675页

作者： WANG Yan NIU Jianjun School of transportation Science and Engineering Beihang University Beijing 100191 China International petroleum Exploration and Production Corporation China Petroleum ＆ Chemical Corporation Beijing 100083 China

Iterative Learning Control （ILC） captures interests of many scholars because of its capability of high precision control implement without identifying plant mathematical models, and it is widely applied in control engineering. Presently, most ILC algorithms still follow the original ideas of ARIMOTO, in which the iterative-learning-rate is composed by the control error with its derivative and integral values. This kind of algorithms will result in inevitable problems such as huge computation, big storage capacity for algorithm data, and also weak robust. In order to resolve these problems, an improved iterative learning control algorithm with fixed step is proposed here which breaks the primary thought of ARIMOTO. In this algorithm, the control step is set only according to the value of the control error, which could enormously reduce the computation and storage size demanded, also improve the robust of the algorithm by not using the differential coefficient of the iterative learning error. In this paper, the convergence conditions of this proposed fixed step iterative learning algorithm is theoretically analyzed and testified. Then the algorithm is tested through simulation researches on a time-variant object with randomly set disturbance through calculation of step threshold value, algorithm robustness testing,and evaluation of the relation between convergence speed and step size. Finally the algorithm is validated on a valve-serving-cylinder system of a joint robot with time-variant parameters. Experiment results demonstrate the stability of the algorithm and also the relationship between step value and convergence rate. Both simulation and experiment testify the feasibility and validity of the new algorithm proposed here. And it is worth to noticing that this algorithm is simple but with strong robust after improvements, which provides new ideas to the research of iterative learning control algorithms.

关键词： iterative learning control fixed step time variant system simulating study robot control

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A systemic review of hydrogen supply chain in energy transition

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Frontiers in Energy 2023年第1期17卷 102-122页

作者： Haoming MA Zhe SUN Zhenqian XUE Chi ZHANG Zhangxing CHEN department of Chemical and petroleum Engineering University of CalgaryCalgaryAB T2N 1N4Canada

Targeting the net-zero emission(NZE)by 2050,the hydrogen industry is drastically developing in recent ***,the technologies of hydrogen upstream production,midstream transportation and storage,and downstream utilization are facing *** this paper,the development of hydrogen industry from the production,transportation and storage,and sustainable economic development perspectives were *** current challenges and future outlooks were summarized *** the upstream,blue hydrogen is dominating the current hydrogen supply,and an implementation of carbon capture and sequestration(CCS)can raise its cost by 30%.To achieve an economic feasibility,green hydrogen needs to reduce its cost by 75%to approximately 2$/kg at the large *** research progress in the midterm sector is still in a preliminary stage,where experimental and theoretical investigations need to be conducted in addressing the impact of embrittlement,contamination,and flammability so that they could provide a solid support for material selection and largescale feasibility *** the downstream utilization,blue hydrogen will be used in producing value-added chemicals in the *** the long-term,green hydrogen will dominate the market owing to its high energy intensity and zero carbon intensity which provides a promising option for energy *** in the hydrogen industry require a comprehensive understanding of their economic and environmental benefits over the whole life cycle in supporting operators and policymakers.

关键词： hydrogen production hydrogen transportation and storage hydrogen economy carbon capture and sequestration(CCS) technology assessment

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CHINA’S PIPELINE INDUSTRY IN FUTURE DECADE

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China Oil & Gas 2005年第3期12卷 12-15页

作者： Pan Jiahua Honorary President of petroleum storage ＆ transportation Committee of China petroleum Society

During the ten years between 1994 and 2004, China has made great achievements in pipeline industry, no matter in its construction scope, technical level or *** is a brilliant page in the piping history of ***, what will be the developing state of China's pipeline industry in the future decade? And what will be its developing trend in techniques and management? All of these are greatly concerned by people in this field. The following part is to be discussed with readers from eight aspects.

关键词：中国石油工业管道建设天然气原油能源安全

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