检索结果-南通市图书馆

Asymptotic Analysis Soot Model and Experiment for a Directed Injection engine

Chinese Journal of Mechanical engineering 2012年第5期25卷 1011-1015页

作者： LIU Yongfeng PEI Pucheng XIONG Qinghui LU Yong Beijing engineering Research Center of Monitoring for Construction Safety Beijing University of Civil Engineering and Architecture Beijing 100044 China State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China Science and Technology on Vehicle Transmission Laboratory China North Vehicle Research Institute Beijing 100072 China

The existing soot models are either too complex and can not be applied to the internal combustion engine, or too simple to make calculation errors. Exploring the soot model becomes the pursuit of the goal of many researchers within the error range in the current computer speed. On the basis of the latest experimental results, TP （temperature phases） model is presented as a new soot model to carry out optimization calculation for a high-pressure common rail diesel engine. Temperature and excess air factor are the most important two parameters in this model. When zone temperature T〈 1 500 K and excess air factor Ф〉0.6, only the soot precursors-- polycyclic aromatic hydrocarbons（PAH） is created and there is no soot emission. When zone temperature T ≥ 1 500 K and excess air factor Ф〈0.6, PAHs and soot source terms （particle inception, surface growth, oxidation, coagulation） are calculated. The TP model is then implemented in KIVA code instead of original model to carry out optimizing. KIVA standard model and experimental data are analyzed for the results of cylinder pressures, the corresponding heat release rates, and soot with variation of injection time, variation of rail pressure and variation of speed among TP models. The experimental results indicate that the TP model can carry out optimization and computational fluid dynamics can be a tool to calculate for a high-pressure common rail directed injection diesel engine. The TP model result is closer than the use of the original KIVA-3V results of soot model accuracy by about 50% and TP model gives a new method for engine researchers.

关键词： high-pressure common rail diesel engine soot optimization calculation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Message from Editors

引用

CES Transactions on Electrical Machines and Systems 2021年第1期5卷 1-2页

作者： Taeuk JUNG Donghee Lee Dokwan Hong Seonhwan Hwang Jaesuk Lee FREEDM center of North Carolina State University USA Kyungsung University Korea Korea Electrotechnology Research institute Kyungnam University Korea Jeonbuk National University Korea

CURRENTLY,4th Industrial Revolution and Industry 4.0 have been the biggest move in the world from several years *** vehicle and other electrical mobility system such as ship and aircraft,Smart factory and manufacturing have become the main issues of global industry *** power drive systems using internal combustion engine has been replaced by electric motor drive systems having high performance and ecofriendly features.

关键词： friendly Revolution factory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

combustion System Design and Development on 1.4L Miller Gasoline engine

Combustion System Design and Development on 1.4L Miller Gaso...

引用

2018中国汽车工程学会年会

作者： WANG Zhanfeng LIU Yaodong CHEN Haie HUANG Pinghui HAN Yunfeng LIU Ziming China FAW Corporation Limited General R&D institute

In order to meet fuel consumption regulation China Phase 4 and emission regulation China 6,China FAW(First Automobile Work) developed a 1.4 L GDI miller *** cam profile and turbocharger were optimized and designed by one-dimensional thermodynamic analysis.A delicate design of high compression ratio,spray target,and intakeport was realized by Computational Fluid Dynamics(CFD) analysis of in-cylinder flow,atomization and *** combustion system was finally settled based on optical and thermodynamic engine with the primary target:the specific power is 79 kW/L,the specific torque is 168 N·m/L,the Brake Specific Fuel Consumption(BSFC) is 225 g/kW·h,the maximum thermal efficiency is 37.5%.

关键词： gasoline miller cycle fuel consumption emission combustion performance development

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Numerical Study of Pipeline Distribution Effect on the Performance of Pasty Propellant Rocket Motor

引用

Space(Science & Technology) 2023年第1期3卷 572-584页

作者： Renjie Hu Weizong Wang Advanced Space Propulsion and Energy Laboratory(ASPEL) School of AstronauticsBeihang UniversityBeijingChina Key Laboratory of Spacecraft Design Optimization and Dynamic Simulation Technologies Ministry of EducationBeijingChina Aircraft and Propulsion Laboratory Ningbo Institute of TechnologyBeihang UniversityNingboChina

This paper reports the numerical research on PPRM(pasty propellant rocket motor)through computational fluid dynamics simulation along with pipeline design comparison based on simulation *** structure of PPRM includes feed pipelines,and the propellant is distributed in a cone shape when burnt steadily in the combustion *** a result,the internal flow field presents strong 3-dimensional characteristics,which may lead to the flow *** accurately understand the combustion flow field and flow instability in the PPRM,a numerical simulation of the combustion chamber considering propellant pyrolysis and chemical reaction,coupled with the feed system module,is employed in the *** effect of pipeline distribution,including the pipeline location and the nonuniformity of pipeline diameter on the internal combustion flow characteristics as well as the motor thrust,was *** results show that the vortex caused by the special conical shape of the burning surface leads to pressure *** adjusting the pipeline location and the nonuniformity of pipeline diameter,the distribution of vortex varies dramatically,which leads to different oscillation frequencies and *** some pipeline distribution schemes,there is almost no large vortex in the rocket motor,which greatly eliminates the flow acoustic coupling oscillation of the *** oscillation amplitude decreases from about 5.7%to less than 0.1%.The results will help guide the design of the high-performance feed system and combustion chamber of PPRM.

关键词： vortex oscillation eliminate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CFD study of non-premixed swirling burners: Effect of turbulence models

引用

Chinese Journal of Chemical engineering 2020年第4期28卷 1029-1038页

作者： Erfan Khodabandeh Hesam Moghadasi Mohsen Saffari Pour Mikael Ersson Par G.Jonsson Marc A.Rosen Alireza Rahbari Department of Mechanical engineering Amirkabir University of TechnologyTehranIran School of Mechanical engineering Department of Energy ConversionIran University of Sciesnce and Technology(IUST)Narmak 16846-13114TehranIran Department of Mechanical engineering Shahid Bahonar University of KermanKermanIran Division of Processes Department of Materials Science and EngineeringKTH Royal Institute of TechnologyBrinellvägen 23SE-10044 StockholmSweden Faculty of engineering and Applied Science University of Ontario Institute of TechnologyOshawaOntarioL1H 7K4Canada Department of Mechanical engineering Shahid Rajaee Teacher Training University(SRTTU)TehranIran Research School of engineering The Australian National UniversityCanberraACT 2601Australia

This research investigates a numerical simulation of swirling turbulent non-premixed *** effects on the combustion characteristics are examined with three turbulence models:namely as the Reynolds stress model,spectral turbulence analysis and Re-Normalization *** addition,the P-1 and discrete ordinate(DO)models are used to simulate the radiative heat transfer in this *** governing equations associated with the required boundary conditions are solved using the numerical *** accuracy of this model is validated with the published experimental data and the comparison elucidates that there is a reasonable agreement between the obtained values from this model and the corresponding experimental *** different models proposed in this research,the Reynolds stress model with the Probability Density Function(PDF)approach is more accurate(nearly up to 50%)than other turbulent models for a swirling flow *** the effect of radiative heat transfer model,it is observed that the discrete ordinate model is more precise than the P-1 model in anticipating the experimental *** model is able to simulate the subcritical nature of the isothermal flow as well as the size and shape of the internal recirculation induced by the swirl due to combustion.

关键词： Computational Fluid Dynamics(CFD) Turbulent combustion Non-premixed flames Large eddy simulations Radiative heat transfer model Modeling validation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new perspective on hydrogenation of CO2 into methanol over heterogeneous catalysts

引用

Progress in Natural Science:Materials International 2024年第3期34卷 482-494页

作者： Xueyuan Pan Jingcheng Xu Yali Wang Mingzhe Ma Haiquan Liao Hao Sun Mengmeng Fan Kui Wang Kang Sun Jianchun Jiang Key Lab.of Biomass Energy and Material Jiangsu Province Key and Open Lab.of Forest Chemical Engineering SFA National Engineering Lab.for Biomass Chemical Utilization Institute of Chemical Industry of Forest Products Chinese Academy of Forestry Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry University

The utilization of carbon dioxide is critical to realize the objective of "carbon peak and neutrality". Among various carbon dioxide exploitation approaches, catalytic hydrogenation of carbon dioxide is a significant method to selectively convert the CO2into methanol and other valuable chemicals. Among these products, methanol is a crucial chemical feedstock that can be utilized as a platform molecule for the synthesis of chemicals and fuels as well as a fuel for internal combustion engines and fuel cells, causing particular interest. Nowadays, Catalytic hydrogenation of carbon dioxide into methanol has shifted its focus on the creation of low-cost, environmentally friendly, and efficient catalysts. Inspired of this, we have concluded the mechanism of catalytic hydrogenation of carbon dioxide, and reviewed the research progress of multiple heterogeneous catalysts with high catalytic application prospect, especially the supported catalysts.

关键词： Carbon dioxide Hydrogenation Methanol Heterogeneous catalyst

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Oxidation behaviors of the rotary friction welded joints of HT700 superalloy in saturated water steam at 700℃

Corrosion Communications

引用

Corrosion Communications 2022年第02期 40-47页

作者： Chunlin Huang Jintao Lu Ming Zhu Yaxin Xu Boshuai Li Yongli Zhou Jinyang Huang National engineering Research Center of Clean Coal combustion for Utility Boilers Xi'an Thermal Power Research Institute Co Ltd. Xi'an University of Science and Technology College of Material Science and Engineering State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding Technologies Northwestern Polytechnical University

The oxidation behavior of welded joints with or without heat-treatment of HT700 alloy was studied in 700℃ saturated water vapor with regards to oxidation kinetics,oxide film composition,and *** results show that the oxide film compositions of the as-welded joints and heat-treated welded joints were basically the *** oxide film is composed of a small amount of iron oxide,NiCr2O4,and a large amount of Cr2O3from the outer layer to the inner layer,with a small amount of internal oxidation products *** the beginning of the oxidation process,the double layer oxide film grew at the same time,so that the as-welded joint had better performance in the later stage of *** formation of a continuous internal oxidation layer was later in heat-treated welded joints as compared to the as-welded joint,resulting in a larger thickness of the oxide *** oxidation behavior of the welded seams in different regions of as-welded state and heat treatment state after welding displayed the following characteristics:small grain size,thin oxide film,and the weld fusion line with thin oxide film.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat recovery

引用

Frontiers in Energy 2017年第4期11卷 527-534页

作者： Yiji LU Anthony Paul ROSKILLY Long JIANG Longfei CHEN Xiaoli YU Sir Joseph Swan Centre for Energy Research Newcastle University Newcastle NE1 7RU UK institute of Refrigeration and Cryogenics Shanghai Jiao TongUniversity Shanghai 200240 China School of Energy and Power engineering Beihang University Beijing 100191 China Department of Energy engineering Zhejiang University Hangzhou310027 China

The development of engine waste heat recov- ery technologies attracts ever increasing interests due to the rising strict policy requirements and environmental con- cerns. This paper presented the study of engine coolant and exhaust heat recovery using organic Rankine cycle （ORC）. Eight working fluids were selected to evaluate and compare the performance of the integrated waste heat recovery system. Rather than the conventional engine ORC system mainly focusing on the utilization of exhaust energy, this work proposed to fully use the engine coolant energy by changing the designed parameters of the ORC system. The case study selected a small engine as the heat source to drive the ORC system using a scroll expander for power production. The evaluation results suggest that under the engine rated condition, the solution to fully recover the engine coolant energy can achieve a higher power generation performance than that of the conven- tional engine ORC system. The results suggest that adding a recuperator to the ORC system can potentially improve the system performance when the working fluids are dry and the overall dumped heat demand of the system can be reduced by 12% under optimal conditions. When the ORC evaporating and condensing temperature are respectivelyset at 85℃ and 30℃, the integrated engine waste heat recovery system can improve the overall system efficiency by 9.3% with R600, R600a or n-Pentane as the working fluid.

关键词： organic Rankine cycle scroll expander cool-ant and exhaust recovery internal combustion engine

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高负荷风扇损失源量化分析方法研究

引用

风机技术 2022年第6期64卷 10-17页

作者：刘良烨伊卫林 Beijing institute of Technology

Turbofan engine is very important for civil *** fan as a crucial component,its internal flow mechanisms is more complex and the loss mechanisms analysis is more difficult with the demand for greener,more efficient aircraft *** this paper,taking Rotor67,a high-load fan rotor,as the research *** the physical characteristics of the fluid in the computational fluid dynamics(CFD)results,the losses are divided into five loss regions:shock loss,boundary layer loss,tip clearance leakage loss,corner separation loss and wake *** region is defined by the flow physics in the CFD results combined with geometrical *** operating conditions of design point,near stall point and choke point are taken into account,and the loss of each loss zone is quantified by using the entropy rate analysis theory,which provides a basis for the loss analysis of transonic fan and blade optimization.

关键词： High Load Fan Loss Generation Entropy Production Computational Fluid Dynamics(CFD)

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modern Electrical Power Source on New System of Dissipation and Renewable Energies Sources

引用

Computer Technology and Application 2014年第1期5卷 7-14页

作者： Zygmunt Szymanski institute of Electrical engineering and Process Control in Mines Silesian University of Technology Gliwice Gliwice 44-100 Poland

This paper presents some solutions of modem renewable energy system applied actually in dissipation energy source： wind turbine, solar panel battery charge, SSS （support set system）, and standby diesel generator cooperated in series, parallel and hybrid system with main energy system. Its solution enable obtain independent individual energy source in different work exploitations. One of problems concerned with alternative energy source is changes of output voltages and output power dependence of climatic conditions. Possible solution is application of decoupled adjustable speed generation system in renewable energy generation. The decoupled generation system consists of： alternative energy source, internal combustion engine drives permanent magnet generator and DC/AC, or AC/AC converter. Performance of single decoupled generation set is discussed supported by results of laboratory tests. To provide high quality voltage is applied an additional energy storage, made from super capacitor and bidirectional DC/DC convert. Such system performs very stiff voltage in any load condition. Integration of solar battery panels or renewable wind energy system is provided via DC link of the variable speed decoupled autonomous generation system. Results of computer simulation and laboratory experiments are presented in the paper.

关键词： Power source renewable energy dissipation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：