scholarly journals ИССЛЕДОВАНИЕ ЭКОЛОГИЧЕСКИХ ПОКАЗАТЕЛЕЙ АВТОТРАКТОРНОГО ДИЗЕЛЯ ПРИ РАБОТЕ НА ПРЕДЕЛЬНЫХ СОСТАВАХ ЭТЭ

2019 ◽  
Author(s):  
S.A. Plotnukov ◽  
A.N. Kartashevich ◽  
A.V. Plyago
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
High Speed ◽  
Ecological Indicators ◽  
Experimental Installation ◽  
Optimum Angle ◽  
Rotary Speed ◽  
Definition Of ◽  
Speed Characteristic

Цель исследований экспериментальное определение токсических показателей дизельного двигателя Д-245.5S2 сельскохозяйственного трактора при его работе на этаноло-топливной эмульсии с предельным содержание этанола в смеси. Объект исследования: экспериментальная установка (двигатель Д-245.5S2, электротормозной стенд RAPIDO SAK N670 с балансирной маятниковой машиной). Испытания дизеля проводились в соответствии с ГОСТ 18509-88. Исследования проводились на дизельном топливе и этаноло-топливной эмульсии с содержанием этанола 20 и 50 в смеси. Во время проведения исследований снималась регулировочная характеристика для определения оптимального угла опережения впрыскивания (угол 22 до верхней мертвой точки (ВМТ)). Затем снимались нагрузочные характеристики при частоте вращения коленчатого вала 1800 мин-1 и 1400 мин-1 и скоростная характеристика. Во всех экспериментах производилась фиксация эффективных и экологических показателей. Опираясь на полученные в результате испытаний экспериментальные данные, были установлены зависимости токсических показателей дизеля при его работе на этаноло-топливной эмульсии. Также были выявлены изменения токсичности и дымности отработавших газов при разных составах топлива. Приведены графики нагрузочной характеристики (экологические показатели) работы двигателя на базовом топливе и на этаноло-топливной эмульсии с содержанием 20 и 50 этанола в смеси.The purpose of probes - experimental definition of toxic indicators of diesel engine D-245.5S2 at its work on etanolo-fuel emulsion with limiting the ethanol maintenance in a mixture. Object of probe: experimental installation (engine D-245.5S2, electrobrake stand RAPIDO SAK N670 with balancer by pendular car). Diesel engine tests were spent according to GOST 18509-88. Probes were spent on diesel fuel and etanolo-fuel emulsion with the maintenance of ethanol of 20 and 50 to mixtures. During carrying out of probes the adjusting characteristic, for definition of an optimum angle of an injection advance (a corner 22 to the top dead point (TDP)) acted in film. Then loading characteristics acted in film at rotary speed of a bent shaft of 1800 mines-1 both 1400 mines-1 and the high-speed characteristic. At all experimentals fixing of effective and ecological indicators was made. Leaning against the received experimental data as a result of tests, dependences of toxic indicators of a diesel engine have been established at its work on etanolo-fuel emulsion. Also changes of toxicity and smoke, the fulfilled gases are revealed at different structures of fuel. Schedules of the loading characteristic (ecological indicators) engine works on base fuel and on etanolo-fuel emulsion with the maintenance of 20 and 50 of ethanol in a mixture are resulted.

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

Study on Performance Optimization of Car Diesel Engine with VNT Based on One-Dimensional Simulation and Experimental Verification

2012 ◽  
Vol 155-156 ◽  
pp. 12-17 ◽  
Author(s):  
Lian Xu Wang ◽  
Da Wei Qu ◽  
Chang Qing Song ◽  
Ye Tian
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Performance Optimization ◽  
High Speed ◽  
Turbine Blades ◽  
Simulation Software ◽  
Engine Operation ◽  
One Dimensional ◽  
Distribution Phase ◽  
Dimensional Simulation

To research the performance optimization of high speed car diesel engine，firstly according to the characteristic of car diesel engine with Variable Nozzle Turbocharger (VNT)， one-dimensional cycle model of the engine was established by using simulation software BOOST and validated by experimental data in this paper. The turbine blades’ opening corresponding to different speed was determined. Therefore the problem that the VNT surges at low engine speed and the inlet air flow is insufficient at high speed was solved. Based on the above model, this paper improved the efficiency of the engine by optimizing the compression ratio and the distribution phase of camshaft and then used the experimental data to check the simulation results. Meanwhile the fuel consumption and the possibility of the engine operation roughness decreased.

Characteristics of performance and emissions in high-speed direct injection diesel engine fueled with diethyl ether/diesel fuel blends

Energy ◽  
2012 ◽  
Vol 43 (1) ◽  
pp. 214-224 ◽  
Author(s):  
Dimitrios C. Rakopoulos ◽  
Constantine D. Rakopoulos ◽  
Evangelos G. Giakoumis ◽  
Athanasios M. Dimaratos
Keyword(s):  
Diesel Engine ◽  
Diethyl Ether ◽  
Diesel Fuel ◽  
High Speed ◽  
Direct Injection ◽  
Direct Injection Diesel Engine ◽  
Fuel Blends ◽  
Performance And Emissions

Performance Calculation of a TBD234V12 Diesel Engine with STC

2012 ◽  
Vol 157-158 ◽  
pp. 1075-1078
Author(s):  
Yang Wang ◽  
Yin Yan Wang ◽  
Fan Shi ◽  
Xin Guang Li
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Computer Model ◽  
High Speed ◽  
Marine Diesel Engine ◽  
High Speed Diesel ◽  
Turbocharging System ◽  
Marine Diesel ◽  
Performance Calculation ◽  
Good Agreement

A computer model for a TBD234V12 marine high-speed diesel engine with 2 turbocharger(2TC) is built on GT-POWER. For validating the computer model, a calculation to the conventional turbocharging system has been done firstly, and the results show good agreement with experimental data. The computer model has then been used for predictive studies of the diesel engine with the proposed STC system on the mapping characteristics. From these results, it can be seen that the STC system can not only improve the part load performance of the diesel engine obviously, but also enlarge the operating range of the marine diesel engine.

scholarly journals Evaluation of Combustion Performance and Heat Release in Preheated Fuel Consumed Diesel Engines

2021 ◽  
Vol 31 (3) ◽  
pp. 349-363
Author(s):  
Sergey А. Plotnikov ◽  
Anatoly N. Kartashevich ◽  
Marina V. Motovilova
Keyword(s):  
Experimental Data ◽  
Diesel Engine ◽  
Heat Release ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Heating Temperature ◽  
Combustion Process ◽  
Thermal Action ◽  
Fuel Combustion ◽  
Combustion Performance

Introduction. The expansion of the fleet of tractors and vehicles causes increased requirements for internal combustion engines. This problem can be solved by improving the work process in a diesel engine that can be achieved by heating the diesel fuel in the fuel supply system. External thermal action is carried out on the high pressure line directly in front of the injectors. Materials and Methods. To analyze and calculate the process of combustion and heat release in a diesel engine with preliminary thermal fuel preparation, bench tests were carried out using the National Instruments software and the necessary equipment. Results. Experimental data of the diesel fuel combustion process in the cylinder of the 4CHN 11.0/12.5 engine are obtained. The analysis of the combustion performance and heat release of diesel with a preliminary high-temperature effect on the fuel was carried out. Indicator diagrams, graphs of heat release, the maximum average temperature of gases in the engine cylinder, and graphs of active and total heat release were constructed. The experimental data showed a decrease in the ignition delay period, the maximum cycle temperature in the engine cylinders, and an acceleration of the start of heat release and combustion process. The values of the parameters of the diesel fuel combustion process are obtained. Discussion and Conclusion. On the basis of the conducted studies, the dependences of the parameters of the combustion process of a diesel engine with fuel heating to high temperatures are revealed. Indicator diagrams allow drawing a conclusion about the influence of the fuel heating temperature on the intensification of the combustion process. There is an acceleration of the beginning of heat release, a decrease in the rate of pressure build-up and in the rigidity of the engine.

scholarly journals Design of radial impellers: A combined extended analytical and numerical method

2009 ◽  
Vol 223 (4) ◽  
pp. 901-917 ◽  
Author(s):  
P Epple ◽  
B Karic ◽  
Č Ilić ◽  
S Becker ◽  
F Durst ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Method ◽  
High Speed ◽  
High Efficiency ◽  
Design Method ◽  
Design Stage ◽  
Flow Information ◽  
Efficiency Increase ◽  
Commercial Solver ◽  
Speed Characteristic

The use of high-speed radial impellers is very common in blowers for industrial application. It is also very common to manufacture these impellers using circular arc blades. The design process as well is almost always based on former impeller series and experimental data available. In this work, a method is presented to improve the efficiency of radial impellers with a combined analytical and numerical method. This method is based on an extended analytical formulation of the flow in radial impellers, allowing optimizing efficiency in the design stage. It is complemented by the mathematical implementation of a well-known qualitative principle of efficiency optimization according to Carnot. Finally, the torque-speed characteristic of the motor is included in the design stage. The blade shapes are computed using an inverse method. The design is then validated by means of computational fluid dynamics (CFD) computation with a commercial solver. Finally, a prototype was built and measurements were carried out in a test rig. It is also shown that the design method provided very good predictions leading to an efficiency increase of 13 per cent and a maximum flowrate increase of 11 per cent. The design point was also met. It is also shown that the numerical computations and measurements are in good agreement. An analysis of the CFD results is also presented, giving an insight view into the substantial flow information within the old and the new impellers. The method presented is a combined analytical and numerical method suited to design high-efficiency radial impellers considering also the torque-speed characteristic of the motor without the need of a previous impeller series or knowledge of experimental data.

scholarly journals Prediction of diesel engine performance, emissions and cylinder pressure obtained using bioethanol-biodiesel-diesel fuel blends through an artificial neural network

2017 ◽  
Vol 26 (2) ◽  
pp. 74 ◽  
Author(s):  
Hasan Aydogan
Keyword(s):  
Neural Network ◽  
Experimental Data ◽  
Artificial Neural Network ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Back Propagation Algorithm ◽  
Performance And Emission ◽  
Fuel Blends ◽  
Artificial Neural

The changes in the performance, emission and combustion characteristics of bioethanol-safflower biodiesel and diesel fuel blends used in a common rail diesel engine were investigated in this experimental study. E20B20D60 (20% bioethanol, 20% biodiesel, 60% diesel fuel by volume), E30B20D50, E50B20D30 and diesel fuel (D) were used as fuel. Engine power, torque, brake specific fuel consumption, NOx and cylinder inner pressure values were measured during the experiment. With the help of the obtained experimental data, an artificial neural network was created in MATLAB 2013a software by using back-propagation algorithm. Using the experimental data, predictions were made in the created artificial neural network. As a result of the study, the correlation coefficient was found as 0.98. In conclusion, it was seen that artificial neural networks approach could be used for predicting performance and emission values in internal combustion engines.

scholarly journals RESEARCH ON DOMESTICALLY PRODUCED FIRE-FIGHTING FOAM AGENTS FOR SUBSURFACE FIRE EXTINGUISHING

Fire Safety ◽  
2018 ◽  
pp. 5-14
Author(s):  
T. M. Voitovych ◽  
B. M. Gusar ◽  
V. V. Kovalyshyn ◽  
V. V. Koshelenko ◽  
O. V. Grushovinchuk
Keyword(s):  
Diesel Fuel ◽  
Petroleum Products ◽  
Fire Fighting ◽  
Experimental Investigations ◽  
Fire Simulation ◽  
Experimental Installation ◽  
Fire Extinguishing ◽  
Fuel Layer ◽  
Steel Tanks ◽  
Definition Of

This research outlines the problems of fire extinguishing in tanks, and describes a projected model of an experimental installation for the vertical tank fire simulation. The research also describes a method of extinguishing fires of oil and petroleum products in vertical steel tanks by supplying low expansion foam to the tank base directly into the fuel layer. The time of diesel fuel and gasoline fires extinguishing with the help of general and special purpose fire-fighting foam agents was calculated. Experimental investigations on definition of the fire-extinguishing efficiency of domestically producted fire-fighting foam agents by subsurface fire extinguishing of tanks were carried out.

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