Low Temperature Nonequilibrium Plasma Production for Ignition and Combustion Control in Hypersonic Flow

2002 ◽  
Author(s):  
Sergei Bozhenkov ◽  
Svetlana Starikovskaia ◽  
Andrei Starikovskii
Keyword(s):  
Low Temperature ◽  
Hypersonic Flow ◽  
Nonequilibrium Plasma ◽  
Combustion Control ◽  
Plasma Production ◽  
Ignition And Combustion ◽  
Temperature Nonequilibrium

Investigation of the ionization rate in a low-temperature nonequilibrium plasma flux

1975 ◽  
Vol 29 (4) ◽  
pp. 1314-1318
Author(s):  
G. V. Babkin ◽  
A. V. Potapov ◽  
V. V. Proshkin ◽  
L. E. Tsvetkova
Keyword(s):  
Low Temperature ◽  
Nonequilibrium Plasma ◽  
Ionization Rate ◽  
Plasma Flux ◽  
Temperature Nonequilibrium

scholarly journals Effective complex hydrophobizators for self-cleaning facade materials

2019 ◽  
Vol 97 ◽  
pp. 02035
Author(s):  
Mikhail Bruyako ◽  
Natalya Ivashchenko ◽  
Kristina Dobrina ◽  
Mikhail Moshnikov
Keyword(s):  
Contact Angle ◽  
Low Temperature ◽  
Nonequilibrium Plasma ◽  
Contact Angles ◽  
Fine Aggregate ◽  
Research Results ◽  
Wetting Contact Angle ◽  
Self Cleaning ◽  
Contact Angle Of Wetting ◽  
Temperature Nonequilibrium

In the work presented here, we present the research results of the effect of self-cleaning of surfaces. The methods of its achievement such as photocatalytic and the method of hydrophobization are considered. The known methods for determining the contact angle of wetting are used. An installation for generating a low-temperature nonequilibrium plasma was used to modify a fine aggregate. The contact angles of wetting obtained as a result of the use of various formulations of hydrophobizing suspensions are determined experimentally. A modification of the quartz filling matter was also carried out. Experiments have confirmed the technical effectiveness of hydrophobisers and the enhancement of their properties when dispersed fillers are used. Even higher values of wetting contact angle were achieved using a plasma-modified filling matter.

https://elibrary.ru/item.asp?id=44369782&pf=1

2020 ◽  
Author(s):  
QI CHEN ◽  
◽  
JINTAO SUN ◽  
JIANYU LIU ◽  
BAOMING ZHAO ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Internal Combustion Engines ◽  
Nonequilibrium Plasma ◽  
Combustible Mixture ◽  
Combustion Engines ◽  
Combustion Chemistry ◽  
Microwave Radio ◽  
Different Types ◽  
Gas Molecules ◽  
Ignition And Combustion

Plasma-assisted ignition and combustion, widely applied in gas turbines, scramjets, and internal combustion engines, has been considered as a promising technique in shortening ignition delay time, improving combustion energy efficiency, and reducing emission. Nonequilibrium plasma can excite the gas molecules to higher energy states, directly dissociate or ionize the molecules and, thereby, has the potential to produce reactive species at residence time and location in a combustible mixture and then to efficiently accelerate the overall pyrolysis, oxidation, and ignition. Previous studies have demonstrated the effectiveness of plasma-assisted combustion by using direct current, alternating currant, microwave, radio frequency, and pulsed nanosecond discharge (NSD). Due to the complicated interaction between plasma and combustion in different types of plasma, detailed plasma-combustion chemistry is still not well understood.

Heat Release Experimental Analysis for RCCI Combustion Optimization

2018 ◽  
Author(s):  
V. Ravaglioli ◽  
F. Ponti ◽  
F. Carra ◽  
M. De Cesare
Keyword(s):  
Low Temperature ◽  
Experimental Analysis ◽  
Closed Loop ◽  
Combustion Stability ◽  
Closed Loop Control ◽  
Combustion Control ◽  
Transient Conditions ◽  
Feed Forward ◽  
Loop Control ◽  
Injection Parameters

Over the past years, the increasingly stringent emission regulations for Internal Combustion Engines (ICE) spawned a great amount of research in the field of combustion control optimization. Nowadays, optimal combustion control has become crucial, especially to properly manage innovative Low Temperature Combustion (LTC) strategies, usually characterized by high instability, cycle-to-cycle variability and sensitivity to slight variations of injection parameters and thermal conditions. Many works demonstrate that stability and maximum efficiency of LTC strategies can be guaranteed using closed-loop control strategies that vary the standard injection parameters (mapped during the base calibration activity) to keep engine torque and center of combustion (CA50) approximately equal to their target values. However, the combination of standard base calibration and closed-loop control is usually not sufficient to accurately control Low Temperature Combustions in transient conditions. As a matter of fact, to properly manage LTC strategies in transient conditions it is usually necessary to investigate the combustion methodology of interest and implement specific functions that provide an accurate feed-forward contribution to the closed-loop controller. This work presents the experimental analysis performed running a light-duty compression ignited engine in dual-fuel RCCI mode, the goal being to highlight the way injection parameters and charge temperature affect combustion stability and ignition delay. Finally, the paper describes how the obtained results can be used to define the optimal injections strategy in the analyzed operating points, i.e. the combination of injection parameters to be used as a feed-forward for a closed-loop combustion control strategy.

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