搜索结果: 31-44 共查到“diesel engine”相关记录44条 . 查询时间(0.17 秒)
柴油机缸盖水腔流动与沸腾传热的流固耦合数值模拟（Fluid-solid Coupling Numerical Simulation on Flow and Boiling Heat Transfer of Cooling Water-jacket in Cylinder Head of Diesel Engine）
气缸盖 冷却水腔 沸腾传热 流固耦合 数值模拟
2010/5/5
采用CFD软件STAR-CD和FEA软件ABAQUS对226B型柴油机缸盖冷却水腔内的流动和传热过程进行了流固耦合数值模拟计算。为反映沸腾传热的影响，基于FORTRAN语言开发了单相流沸腾传热模型，将其嵌入到STAR-CD中。与试验结果的比较表明，加入沸腾传热模型可以大幅度提高模拟计算的精度，最大误差由18%下降至7%，为柴油机冷却水腔的优化设计提供了理论依据。 Fluid-solid coupl...
EGR与富氢进气对柴油机性能和排放的影响（Effect of EGR and Intake Hydrogen Enrichment on Performance and Emissions of Automotive Diesel Engine）
柴油机 废气再循环 富氢进气 排放
2010/5/5
试验研究了利用EGR加富氢进气改善ZS195型柴油机性能和排放的可行性，在标定转速下试验研究了不同EGR率、掺氢率对ZS195型柴油机工作过程、排放和经济特性的影响。研究结果表明：在高负荷工况，当EGR率一定时，随着掺氢率的增加，缸内峰值压力和压力升高率峰值增加。EGR加富氢进气可以降低HC、CO排放量和烟度，但NOx排放量有所增加。ZS195型柴油机采用EGR技术后，富氢进气会提高缸内混合气的燃...
Carbonyls Emission Comparison of a Turbocharged Diesel Engine Fuelled with Diesel, Biodiesel, and Biodiesel-Diesel Blend
Turbocharged Engine Direct Injection Biodiesel Unregulated Emissions
2010/1/15
In order to characterize the carbonyls emissions from a turbocharged, direct injection, and intercooled compression ignition
engine, an experimental study was conducted using diesel, biodiesel, and 2...
柴油机缸内工作过程的数值模拟（Numerical Simulation of Working Process in the Cylinder of Diesel Engine）
柴油机 工作过程 多维
2009/5/22
利用CFD软件AVL_Fire对YD490ZL型柴油机进气、压缩、燃烧过程进行了多维瞬态数值模拟。通过对柴油机工作过程中不同时刻气体流动、壁面传热、燃油喷雾雾化、颗粒形成等因素的分析，结果认为适当调整燃烧室中心相对气缸中心在X方向的距离，可以使燃烧更加充分、提高柴油机的燃油经济性；燃烧室换热系数不仅随空间位置变化，而且还随时间变化而各不相同，通过这种多维瞬态计算能够提供不同时刻、不同位置的换热系数...
柴油机功率强化前后气缸盖的温度场模拟与试验（Simulation and Experiment of Temperature Field on Diesel Engine Cylinder Head before and after Enhancement of Power）
柴油机 气缸盖 温度场
2009/5/22
对功率强化前后的柴油机分别进行了性能仿真计算，进而确定了缸盖温度场计算的边界条件；利用有限元软件对气缸盖进行三维稳态热分析，并考虑了冷却水沸腾换热的影响；在该柴油机的单缸试验机上进行了稳态温度场测量试验，分析了试验和计算结果；得到了火力面边界条件的设置规律、稳态温度场随工况的变化关系和单缸机与多缸机的稳态温度场差别。
多缸柴油机转速波动与燃烧不均匀性的相关性（Correlation between Fluctuation of Speed and Combustion Nonuniformity in a Diesel Engine）
多缸柴油机 转速波动 燃烧不均匀性
2010/2/26
测量了不同转速和负荷下V型6缸增压柴油机6个气缸内的瞬态压力和瞬时转速波动，分析了瞬时转速波动和各缸燃烧不均匀性的相关性。试验表明：多缸柴油机相邻的两缸压力峰值对应的曲轴转角之间总会出现一个转速波动峰值，并且某一缸燃气对活塞作功越大，随后出现的转速波动峰值越大，反之，转速波动峰值越小；当平均转速一定时，负荷越大，转速波动率也越大；负荷相同时，转速波动率的大小与转速没有单调变化关系。 For a V...
Effects of Biodiesel Blending on Particulate and Polycyclic Aromatic Hydrocarbon Emissions in Nano/Ultrafine/Fine/Coarse Ranges from Diesel Engine
Size distribution Diesel engine Engine dynamometer Emission factor PAH corresponding carcinogenity
2016/3/29
The influences of different blending percentages of biodiesel on the size distributions of particulate
matter (PM) and polycyclic aromatic hydrocarbons (PAHs) are not well known. In this study,
comm...
柴油机燃烧噪声增压影响机理试验分析（Effect of Turbocharged Condition on Combustion Noise of Diesel Engine）
直喷式柴油机 燃烧 噪声 增压条件 试验
2010/5/5
研究了直喷式柴油机增压对燃烧噪声的影响机理。通过测量稳态和恒转矩增转速瞬态工况增压前后影响燃烧噪声的参数，得出增压前后柴油机燃烧噪声的变化规律。从燃烧室壁面温度、气体动力载荷和压力高频振荡等方面对试验结果进行分析。结果表明：增压后燃烧噪声降低，增压对稳态工况燃烧噪声的降低比对恒转矩增转速瞬态工况更明显，增压在中速中负荷工况下，对燃烧噪声的控制效果较好。 This paper studied the...
Determination of the temperature distribution in the wet cylinder sleeve in turbo diesel engine
Numerical techniques Heat loads of the wet cylinder sleeve FEM
2010/2/8
Purpose: The determination of the temperature distribution in the wet cylinder sleeve in initial phase of the work of turbo Diesel engine.Design/methodology/approach: The results of calculations of th...
The effect of fuel additive SO-2E on diesel engine performance when operating on Diesel fuel and shale oil
Diesel engine fuel additive shale oil performance efficiency emissions smoke opacity
2010/11/2
The purpose of this research is to perform comparative analysis of the effect of fuel additive SO-2E on the economical and ecological parameters of a direct-injection Diesel engine, operating on Diese...
Performance and exhaust emissions of direct-injection diesel engine operating on rapeseed oil and its blends with diesel fuel
Diesel engine rapeseed oil fuel blends performance efficiency emissions smoke opacity
2010/11/2
The purpose of this research is to examine the effect of rapeseed oil (RO) inclusion into Diesel fuel (DF) on engine performance parameters. During engine operation at 1 400, 1 800 and 2 200 min-1 the...
The influence of effective utilization degree of diesel engine cylinder air charge on soot emission and indicated efficiency
diesel engine soot emission air charge heat losses of heat combustion indicated efficiency
2010/11/2
Mathematical simulator results of the influence of effective utilization degree of (a diesel engine) cylinder air charge on soot emission and connected losses of heat are given in this paper. Increase...
Mathematical model of combined parametrical analysis of indicator process and thermal loading on the Diesel engine piston
diesel engine indicator process piston thermal loading
2010/11/2
In the publication the methodical aspects of a mathematical model of the combined parametrical analysis of an indicator process and thermal loading on the diesel engine piston have been considered. A ...
The influence of fuel additives so-2e on diesel engine exhaust emission
diesel engine fuel additives emission nitrogen oxides carbon oxides smoke
2010/11/2
One of the methods that allows substantially to reduce exhaust smoke of diesel engines and avoid possible damage of the environment by harmful emissions is the usage of multipurpose fuel additives. Th...