Ignition Improvement for Ultra-Lean Dilute Gasoline Combustion

2017 ◽  
Author(s):  
Shui Yu ◽  
Xiao Yu ◽  
Zhenyi Yang ◽  
Meiping Wang ◽  
Xiaoye Han ◽  
...  
Keyword(s):  
Ignition Improvement

GLIDARC reactor power supply with ignition improvement

2019 ◽  
Vol 38 (4) ◽  
pp. 1274-1284 ◽  
Author(s):  
Piotr Krupski ◽  
Henryka Danuta Stryczewska
Keyword(s):  
Power Supply ◽  
Thermal Plasma ◽  
High Speed ◽  
Arc Discharge ◽  
Plasma Reactor ◽  
Secondary Coil ◽  
Content Type ◽  
Discharge Ignition ◽  
Non Thermal Plasma ◽  
Ignition Improvement

Purpose The research purpose of this paper is to confirm that internal overvoltages in the push–pull power inverter can be used to improve the discharge ignition in the gliding arc discharge (GAD) plasma reactor. Design/methodology/approach Investigations are based on the acquisition of voltage changes that occur together with the development of the discharge column and the imaging the GAD with the use of a high-speed camera. Findings The power supply has the distinctive feature of not having the switching overvoltages completely extinguished, as it is in typical push–pull inverters. The overvoltages still exist but only dangerous peaks are cut off. The remaining ones, of a dumped resonance character (Figure 3), are transferred to the secondary coil of the transformer. Correctly shaped overvoltages are used for ignition improvement in the GAD reactor. Practical implications GAD plasma reactors have many applications for pollution control, disinfection and sterilization of surfaces and for plasma deposition, surface functionalization, as well as in agricultural and medical treatment. Investigations prove the push–pull inverter’s advantages in comparison with the transformer-type power supply. Properly configured push–pull inverters have good ignition properties and control options, allowing to generate, desirable for many applications, homogeneous non-thermal plasma. Originality/value The idea of using switching overvoltages in transistors of push–pull switching-mode power supplies is new and has not been previously used to improve discharges ignition in a non-thermal plasma reactor.

HM-60 pyrotechnic igniters ignition improvement

1990 ◽  
Author(s):  
G. DE VALK ◽  
F. ZEE ◽  
G. GADIOT
Keyword(s):  
Ignition Improvement

Some Factors Affecting Altitude Relighting Performance of Turbojet Engine Combustor

1981 ◽  
Author(s):  
Xiong Tian-yu ◽  
Huang Zhao-xiang ◽  
Wang Yi-zhen
Keyword(s):  
Gaseous Fuel ◽  
Test Facility ◽  
Fuel Spray ◽  
Gas Turbine Combustor ◽  
Evaporation Coefficient ◽  
Factors Affecting ◽  
Spark Plug ◽  
Fuel Nozzle ◽  
Ignition Improvement ◽  
Good Agreement

Ignition performance of liquid fuel spray at various fuel/air ratios and the effect of gaseous fuel addition on ignition improvement were investigated on a gas turbine combustor test facility. Distribution of fuel/air ratio with gaseous fuel addition through the spark plug and the fuel nozzle into the flame tube was measured respectively. The universal ignition criterion derived from developed thermal explosion physical model at maximum chemical reaction rate for heterogeneous mixture ignition and the empirical formula of evaporation coefficient in fuel spray are in good agreement with experimental data obtained in dense and dilute fuel spray, and homogeneous mixture.

The Effect of Oxygen Concentration on Ignition of Fuel Spray in Low-Pressure Air Flow

1985 ◽  
Vol 107 (1) ◽  
pp. 18-23
Author(s):  
Y. H. Zhao ◽  
N. K. Chen ◽  
J. S. Chin
Keyword(s):  
Oxygen Concentration ◽  
Low Pressure ◽  
Fuel Spray ◽  
Thermal Ignition ◽  
Oxygen Injection ◽  
Stagnant Region ◽  
Oxygen Addition ◽  
Effect Of Oxygen ◽  
Ignition Improvement ◽  
Local Oxygen

Further experimental research has been carried out on the ignition improvement by oxygen addition in a small pilot combustion chamber taken from an existing aeroengine. Both uniform mixture method and local oxygen injection method have been investigated. The results show that oxygen addition improves low-pressure ignition performance significantly. Local oxygen injection makes much better use of oxygen added. Experimental results show low evaporation percentage of fuel spray responsible for the poor ignition performance. Based on thermal ignition theory, a semianalytical equation has been obtained to predict the relative enlargement of maximum ignition velocity by oxygen addition, the equation can correlate experimental data very well. To form a stagnant region with suitable oxygen concentration is the most important factor in the design of ignitor with oxygen addition.

scholarly journals Effects of Combustion Improver on Performance and Emission Characteristics in Multicylinder Diesel Engine

2019 ◽  
Vol 8 (4S2) ◽  
pp. 170-173
Keyword(s):  
Diesel Engine ◽  
General Public ◽  
Emission Characteristics ◽  
Performance And Emission ◽  
Lemon Grass ◽  
Ci Engine ◽  
Ignition Improvement

The goal of the existing investigation is to research the impacts of the minor enlargement of benzyl liquor, classified one at a time as aliphatic and fragrant sort alcohols depending on the classified hydroxyl collecting function in their sub-atomic shape. Lemon grass and diesel mixtures (B25 and B50) had been organized and attempted to take a look at the CI engine execution, discharge and burning attributes under zero burden conditions. To each one of the four mix gasoline checks organized for B25 and B50, benzyl liquor introduced substances were included at 1% - 5% fixations with the aid of quantity. Test assessments for the general public of the diverse powers had been accomplished in a multi chamber, 4-stroke and regular pace CI motor and the motor attributes have been contrasted and diesel and bio gas mixes. The exploratory exam uncovers that the bad execution of B25 and B50 is upgraded with benzyl liquor (Bn) growth. The development in execution is substantial with an expansion in the centralizations of liquor in B25 and B50 mixes. Higher HC, CO and smoke outflows related with B25 and B50 mix fills emanations are dwindled with liquor compulsion. The end result of this exploration paintings is that poor burning attributes of the bio gas- diesel mix may be progressed with the minor enlargement of aliphatic and aromatic liquor. Higher NOx emanations, benzyl liquor verified promising outcomes as a long way as execution parameters like productiveness, discharge and ignition improvement.

The Effect of Oxygen Concentration on Ignition of Fuel Spray in Low Pressure Air Flow

1984 ◽  
Author(s):  
Y. H. Zhao ◽  
N. K. Chen ◽  
J. S. Chin
Keyword(s):  
Oxygen Concentration ◽  
Low Pressure ◽  
Fuel Spray ◽  
Oxygen Injection ◽  
Stagnant Region ◽  
Aero Engine ◽  
Oxygen Addition ◽  
Effect Of Oxygen ◽  
Ignition Improvement ◽  
Local Oxygen

Further experimental research has been carried out on the ignition improvement by oxygen addition in a small pilot combustion chamber taken from an existing aero-engine. Both uniform mixture method and local oxygen injection method have been investigated. The results show that oxygen addition improves low pressure ignition performance significantly. Local oxygen injection makes much better use of oxygen added. Experimental results show low evaporation percentage of fuel spray responsible for the poor ignition performance. Based on thermal ignition theory, a semi-analytical equation has been obtained to predict the relative enlargement of maximum ignition velocity by oxygen addition, the equation can correlate experimental data very well. To form a stagnant region with suitable oxygen concentration is the most important factor in the design of ignitor with oxygen addition.

scholarly journals Ignition improvement by injector arrangement in a multi-fuel combustor for micro gas turbine

2018 ◽  
Vol 297 ◽  
pp. 012006
Author(s):  
O. Antoshkiv ◽  
T. Poojitganont ◽  
S. Jeansirisomboon ◽  
H. P. Berg
Keyword(s):  
Gas Turbine ◽  
Micro Gas Turbine ◽  
Ignition Improvement
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