scholarly journals Experimental study on the premixed lean-burn in alumina particles based porous burner

2021 ◽  
Vol 7 ◽  
pp. 7434-7444
Author(s):  
Lei Li ◽  
Zhongguang Sun ◽  
Yongjiang Luo ◽  
Yunpei Liang ◽  
Xinyu Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Lean Burn ◽  
Porous Burner ◽  
Alumina Particles

Experimental study of combustion strategy for jet ignition on a natural gas engine

2020 ◽  
pp. 146808742097775
Author(s):  
Ziqing Zhao ◽  
Zhi Wang ◽  
Yunliang Qi ◽  
Kaiyuan Cai ◽  
Fubai Li
Keyword(s):  
Experimental Study ◽  
Natural Gas ◽  
Efficient Points ◽  
Lean Burn ◽  
Gas Engine ◽  
Absolute Value ◽  
Natural Gas Engines ◽  
Natural Gas Engine ◽  
Excess Air ◽  
Lean Limit

To explore a suitable combustion strategy for natural gas engines using jet ignition, lean burn with air dilution, stoichiometric burn with EGR dilution and lean burn with EGR dilution were investigated in a single-cylinder natural gas engine, and the performances of two kinds of jet ignition technology, passive jet ignition (PJI) and active jet ignition (AJI), were compared. In the study of lean burn with air dilution strategy, the results showed that AJI could extend the lean limit of excess air ratio (λ) to 2.1, which was significantly higher than PJI’s 1.6. In addition, the highest indicated thermal efficiency (ITE) of AJI was shown 2% (in absolute value) more than that of PJI. Although a decrease of NOx emission was observed with increasing λ in the air dilution strategy, THC and CO emissions increased. Stoichiometric burn with EGR was proved to be less effective, which can only be applied in a limited operation range and had less flexibility. However, in contrast to the strategy of stoichiometric burn with EGR, the strategy of lean burn with EGR showed a much better applicability, and the highest ITE could achieve 45%, which was even higher than that of lean burn with air dilution. Compared with the most efficient points of lean burn with pure air dilution, the lean burn with EGR dilution could reduce 78% THC under IMEP = 1.2 MPa and 12% CO under IMEP = 0.4 MPa. From an overall view of the combustion and emission performances under both low and high loads, the optimum λ would be from 1.4 to 1.6 for the strategy of lean burn with EGR dilution.

Combustion Visualization and Experimental Study on Multi-Point Micro-Flame Ignited (MFI) Hybrid Lean-Burn Combustion in 4-Stroke Gasoline Engines

2020 ◽  
Author(s):  
Xue-Qing Fu ◽  
Bang-Quan He ◽  
Sipeng Xu ◽  
Tao Chen ◽  
Hua Zhao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Lean Burn ◽  
Gasoline Engines

Experimental study on lean-burn characteristics of an SI engine with hydrogen/gasoline combined injection and EGR

2019 ◽  
Vol 44 (26) ◽  
pp. 13988-13998 ◽  
Author(s):  
Xiumin Yu ◽  
Zezhou Guo ◽  
Ling He ◽  
Wei Dong ◽  
Ping Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Si Engine ◽  
Lean Burn

An Analytical and Experimental Study of Plasma Spraying of Alumina

1988 ◽  
Vol 121 ◽  
Author(s):  
D. J. Varacalle
Keyword(s):  
Experimental Study ◽  
Plasma Spraying ◽  
Numerical Models ◽  
Power Level ◽  
Hydrogen Gas ◽  
Physical Processes ◽  
Particle Injection ◽  
Alumina Particles ◽  
Temperature And Flow Fields

ABSTRACTAs part of an investigation of the dynamics that occur in the plume of a typical thermal spray torch, an analytical and experimental study of the plasma spraying of alumina is being performed; preliminary results are reported here. Numerical models of the physical processes in the torch column and plume were used to determine the temperature and flow fields. Computer simulations of particle injection (15, 34, and 53 μm alumina particles) are also presented. The alumina experiments were conducted at a 35 kW power level using a 100 scfh argon and 15 scfh hydrogen gas mixture for two alumina powders. The quality of the coatings is discussed with respect to porosity, sample metallography, and microhardness.

Experimental study of stratified lean burn characteristics on a dual injection gasoline engine

2022 ◽  
Author(s):  
Chun Xia ◽  
Tingyu Zhao ◽  
Junhua Fang ◽  
Lei Zhu ◽  
Zhen Huang
Keyword(s):  
Experimental Study ◽  
Gasoline Engine ◽  
Lean Burn ◽  
Dual Injection
Sign in / Sign up

Export Citation Format

Share Document