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Combustor design and performance prediction based on parametric model

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航空动力学报 2014年第4期29卷 748-754页

作者： LI Feng SHANG Shou-tang GUO Rui-qing CHENG Ming TANG Zheng-fu SONG Bo School of Energy and Power engineering Beijing University of Aeronautics and Astronautics combustion Design Office Shenyang Engine Design and Research InstituteAviation Industry Corporation of China

By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been *** on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was *** results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes *** combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner *** parametric model method is helpful to provide a fast design method for the aero-engine combustor design.

关键词：经验模型航空动力设计涡旋设计航空设计

Experimental Investigation on Space-dispersed Double-wall Jet combustion System for DI Diesel engine

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Defence Technology（防务技术） 2012年第1期8卷 1-10页

作者：郭鹏江高希彦 institute of internal combustion engine Dalian University of Technology

A space-dispersed double-wall jet combustion system was developed by adopting the wall-guiding spray method and the stratification *** experimental test was carried out to optimize the structural parameters of the diesel-engine combustion system,including chamber structure,swirl ratio of cylinder head,included angle of jet orifice,number and diameter of jet orifice,fuel injection pressure and *** effect of double-wall jet combustion system on combustion and engine performance was tested to obtain the best performance indexes,and the double-wall jet combustion system was compared to the *** results show that NOx is reduced from 712 PPm to 487 PPm at 2 100 r/min,and from 593 PPm to 369 PPm at 3 000 r/min,which are reduced by 31.6% and 37.7%,*** smoke intensity was reduced form 3.67 BSU to 2.1 BSU,and the oil consumption was reduced from 240.5 g/(kW·h) to 225.4 g/(kW·h),which was decreased by 6.3% at low *** pressure in the cylinder was obviously reduced from 115 bar to 108 bar,which was reduced by 6%.

关键词： power machinery engineering wall-guiding double-wall jet diesel engine combustion

FLOW CHARACTERISTICS OF WALLFLOW DIESEL PARTICULATE FILTER SYSTEM WITH REVERSE PULSE AIR REGENERATION

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Chinese Journal of Mechanical engineering 2005年第3期18卷 439-441页

作者： Yao Chunde Shao Yuping Zhang Chunrun Zi XinYun Jiang Dahai Deng Chenglin State Key Laboratory of engine combustion Tianjin University Tianjin 300072 China Department of Automotive engineering Military Traffic Institute Tianjin 300161 China

To simulate steady airflows inside of wall-flow diesel particulate filters （DPF） with different reverse blowing pipes collocation, a mathematical model of the flow in a DPF is established by an equivalent continuum approach. The experimental results agree well with the theoretical values calculated from the model. Simulation shows that the velocity and the pressure distribution of the filters in the regenerative process are key factors to the filter＇s regeneration. How to decrease the mal-distribution of the flow in the filter and how to achieve the better regenerative performance at the least cost of air consumption in the regenerative process are the ultimate goals of the study. Calculation and experiments show that the goals can be realized through adjusting the angle of two reverse blowing pipes and their relative location suitably.

关键词： Wall-flow filter Reverse pulse air regeneration Flow characteristic Simulation

An investigation of the performance of an electronic in-line pump system for diesel engines

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Journal of Marine Science and Application 2008年第4期7卷 261-267页

作者：范立云朱元宪隆武强马修真薛莹莹 internal combustion engine institute Dalian University of Technology Chengdu Wit Electric Fuel Injection Co. Ltd. College of Power and Energy engineering Harbin Engineering University

WIT Electronic Fuel System Co.,*** developed a new fuel injector,the Electronic In-line Pump(EIP) system,designed to meet China's diesel engine emission and fuel economy *** can be used on marine diesel engines and commercial vehicle engines through different EIP systems.A numerical model of the EIP system was built in the AMESim environment for the purpose of creating a design tool for engine application and system *** model was used to predict key injection characteristics under different operating conditions,such as injection pressure,injection rate,and injection *** validate these predictions,experimental tests were conducted under the conditions that were *** results were quite encouraging and in agreement with model *** experiments were conducted to study the injection characteristics of the EIP *** results show that injection pressure and injection quantity are insensitive to injection timing variations,this is due to the design of the constant velocity cam ***,injection quantity and pressure *** width at different cam speeds are presented,an important injection characteristic for EIP system calibration.

关键词： EIP marine engine fuel injection system AMESim

The Current Situation of the Study on Twisted Tape Inserts in Pipe Exchangers

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Journal of Marine Science and Application 2014年第4期13卷 477-483页

作者： Changzhong Man Chong Wang Jinyu Yao institute of internal combustion engine Dalian University of Technology Dalian 116024 China

Heat transfer enhancement is used in many applications including heat exchangers, air conditioning, and refrigeration systems; hence many researchers have conducted experimental and numerical researches on heat transfer enhancement and have developed various techniques and methods. As a passive heat transfer technique, twisted tapes are widely used in various industries for their cost savings, lower maintenance requirements and the fact that they are easily set up. This paper introduces the principle of heat transfer enhancement of twisted tapes and reviews some of the experimental works done by researchers on this technique in recent years. The variously modified twisted tape inserts are widely researched and used to enhance heat transfer efficiency for heat exchangers. Twisted tapes perform better in low Re conditions and in square tubes. However, they could also cause higher pressure drops. Twisted tapes have great potential and profound implications if they can be used in traditional heat exchangers. Besides this, some correlations between the Nusselt number and friction factors are presented in this paper.

关键词： heat exchanger twisted tape swirl flow heat transfer enhancement correlation pipe exchanger

Research on the Impact of CeO2 -based Solid Solution Metal Oxide on combustion Performance of Diesel engine and Emissions

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Journal of Marine Science and Application 2013年第3期12卷 374-379页

作者： Zhipeng Xin Yunbang Tang Changzhong Man Yince Zhao Jianlu Ren institute of internal combustion engine Dalian University of Technology Dalian 116023 China

This paper mainly studies on the performance of high-speed diesel engines and emission reduction when the engine uses heavy oil mixed with nanometer-sized additives Ce0.9 Cu0.1 O2 and Ce0.9 Zr0.1 *** the test,Indiset 620 combustion analyzer made by AVL,was used to make a real-time survey on the cylinder pressure,the fuel ignition moment,and establish a relation between the change trend of temperature in cylinder and the crank *** the engine burning heavy oil and heavy oil mixed with additives,combustion analysis software Indicom and Concerto were used to analyze its combustion process and emission *** investigation shows that nano-sized complex oxide can improve the performance of diesel engine fueled with heavy oil,and reduce the emission of pollutants like NOx and CO,comparing it with the pure heavy *** to the consequences of this experiment,the additives improve the overall performance in the use of heavy oil.

关键词： oil additives nano-sized complex oxide diesel engine combustion analysis emissions

Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders

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Particuology 2024年第1期84卷 12-29页

作者： Shuyuan Liu Luyang Han Hongmei Liu Yingkai Song Linlin Liu Songqi Hu Science and Technology on combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an710072China School of Mechanical engineering and Rail Transit Changzhou UniversityChangzhou213164China Shanghai institute of Space Propulsion Shanghai201112China Shanghai engineering Research Center of Space engine Shanghai201112China

A high-pressure laser ignition and combustion system with adjustable oxidizer gas atmosphere is established to investigate the ignition and combustion characteristics of boron-magnesium(BM)com-posite *** ignition and combustion model of BM powders is established and validated in the present *** results show that increasing water content,O_(2) content and Mg content all result in shorter ignition delay time of BM powders,among which the effect of water content is the most ***,ignition delay time increases as pressure *** combustion time decreases with increasing Mg content and ambient pressure but increases with water *** the increase of O_(2) content,combustion time of BM powders first increases and then decreases,which means a critical O_(2) content exists above which combustion time *** results show that there exists a trade-off between ignition and combustion performance of BM composite powders.

关键词： Boron magnesium powder Laser ignition Ignition and combustion model Reaction mechanism Numerical model

Large eddy simulation of turbulent premixed and stratified combustion using flame surface density model coupled with tabulation method

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Applied Mathematics and Mechanics(English Edition) 2018年第12期39卷 1719-1736页

作者： Zhou YU Hongda ZHANG Taohong YE Minming ZHU Department of Thermal Science and Energy engineering University of Science and Technology of China Shenyang engine Research institute Aero Engine (Group) Corporation of China

Large eddy simulations(LESs) are performed to investigate the Cambridge premixed and stratified flames, SwB1 and SwB5, respectively. The flame surface density(FSD) model incorporated with two different wrinkling factor models, i.e., the Muppala and Charlette2 wrinkling factor models, is used to describe combustion/turbulence interaction, and the flamelet generated manifolds(FGM) method is employed to determine major scalars. This coupled sub-grid scale(SGS) combustion model is named as the FSD-FGM model. The FGM method can provide the detailed species in the flame which cannot be obtained from the origin FSD model. The LES results show that the FSD-FGM model has the ability of describing flame propagation, especially for stratified flames. The Charlette2 wrinkling factor model performs better than the Muppala wrinkling factor model in predicting the flame surface area change by the *** combustion characteristics are analyzed in detail by the flame index and probability distributions of the equivalence ratio and the orientation angle, which confirms that for the investigated stratified flame, the dominant combustion modes in the upstream and downstream regions are the premixed mode and the back-supported mode, respectively.

关键词： large eddy simulation(LES) flame surface density(FSD) model tabulation premixed combustion stratified combustion

Large eddy simulation of turbulent premixed piloted flame using artificial thickened flame model coupled with tabulated chemistry

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Applied Mathematics and Mechanics(English Edition) 2018年第9期39卷 1277-1294页

A sub-grid scale(SGS) combustion model, which combines the artificial thickened flame(ATF) model with the flamelet generated manifold(FGM) tabulation method, is proposed. Based on the analysis of laminar flame structures, two self-contained flame sensors are used to track the diffusion and reaction processes with different spatial scales in the flame front, respectively. The dynamic formulation for the proposed SGS combustion model is also performed. Large eddy simulations(LESs) of Bunsen flame F3 are used to evaluate the different SGS combustion models. The results show that the proposed SGS model has the ability in predicting the distributions of temperature and velocity reasonably, while the predictions for the distributions of some species need further improvement. The snapshots of instantaneous normalized progress variables reveal that the flame is more remarkably and severely wrinkled at the flame tip for flame *** satisfactory results obtained by the dynamic model indicate that it can preserve the premixed flame propagation characteristics better.

关键词： large eddy simulation(LES) artificial thickened flame model tabulation dynamic modeling flame sensor