Article
Energy & Fuels
Han Wu, Xinyi Dong, Zhicheng Shi, Haiying Li, Sheng Miao, Weiren Cao, Yaqing Bo, Lu Zhang, Xiangrong Li
Summary: The effect of injection pressure on diesel ignition is complex, with low-pressure injection being preferred for liquid impingement, while moderately elevated injection pressures under vapor impingement and free spray facilitate fast ignition and optimized heat release.
Article
Energy & Fuels
Onur Baran, Ioannis K. Karathanassis, Phoevos Koukouvinis, Joonsik Hwang, Lyle M. Pickett, David Spivey, Manolis Gavaises
Summary: The influence of additives inducing viscoelasticity in diesel fuel on in-nozzle cavitation evolution and spray morphology has been quantified using high-speed imaging techniques. The additives were found to suppress wall-attached cavitation and enhance longitudinal vortices, leading to increased cone angles of the expelled spray. They also suppressed turbulence-induced transient instabilities.
Article
Energy & Fuels
Ahmet Necati Ozsezen
Summary: The study aimed to investigate the effects of pilot fuel injection and increased boost pressure in a diesel engine fueled with ethanol-butanol-fossil diesel fuel mixtures on combustion characteristics. Results showed that higher alcohol content in the fuel mixture during pilot fuel injection decreased ignition delay and combustion noise.
Article
Chemistry, Applied
Chang Zhai, Yu Jin, Zehao Feng, Feixiang Chang, Hongliang Luo, Keiya Nishida, Yoichi Ogata
Summary: This study investigated the spray combustion characteristics of diesel fuel and found that using a micro-hole diameter injector and ultra-high injection pressure can effectively reduce ignition delay and soot generation. The findings contribute to the development of efficient and low-emission combustion systems.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Zhao Zhang, Haifeng Liu, Zongyu Yue, Yang Li, He Liang, Xiangen Kong, Zunqing Zheng, Mingfa Yao
Summary: This study investigates the effects of compressed air characteristics on the thermal-work conversion process in a diesel engine. The results indicate that the pressure and temperature of the compressed air significantly affect the thermal efficiency of the diesel engine, as well as the emissions of soot and nitrogen oxides.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Thermodynamics
Yaqing Bo, Fushui Liu, Han Wu, Haiying Li, Zhicheng Shi
Summary: The research investigates the impact of injection pressure on impinging ignition at low temperatures in a diesel engine. It finds that increasing injection pressure leads to faster fuel spreading and wider, leaner mixture regions, but extending injection duration is key to successful ignition. The study provides insights into the combustion process during cold starts, highlighting the importance of both injection pressure and duration.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Xiyu Yang, Xiaoyan Wang, Quan Dong, Zuo Ni, Jingdong Song, Tanqing Zhou
Summary: This study presents an innovative fuel injection rate measurement methodology for studying dual-fuel injection characteristics in a high-pressure natural gas direct injection engine. The results demonstrate two different upward trends in injection mass with increasing energizing time, with greater sensitivity observed for shorter energizing times. The duration of gas injection is influenced by both injection pressure and ambient pressure, and increases in either parameter lead to significantly longer injection durations and higher gas injection mass. The pilot diesel injection process has a notable effect on the gas injection rate.
Article
Environmental Sciences
Jatoth Ramachander, Santhosh Kumar Gugulothu, Gadepalli Ravikiran Sastry, Burra Bhsker
Summary: This study focused on maximizing the usage of mahua oil biodiesel in a diesel engine with a common rail direct injection system, analyzing the impact of fuel injection pressure on engine characteristics. By adjusting the injection pressure, ternary fuel can be better utilized, resulting in improved combustion characteristics and higher brake thermal efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Thermodynamics
Wei Chen, Shiwu Yu, Jianfeng Pan, Baowei Fan, Qingsong Zuo, Bin Zhang, Guohui Zhu, Xu Yang
Summary: This study investigates the fuel distribution and combustion process of a high-pressure direct injection diesel Wankel engine under different fuel injection angles. The numerical results show that increasing the fuel injection angle improves power performance, accelerates combustion rate, and reduces emissions. The optimal fuel injection angle is found to be 65 degrees, which increases peak pressure, reduces combustion duration, and decreases soot and carbon dioxide emissions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
P. Pavan, K. Bhaskar, S. Sekar
Summary: The experimental investigation demonstrated that a 40% reduction in NO emission was observed by introducing 10% pilot fuel and higher injection pressure at 32°bTDC compared with single injection mode at 23°bTDC. Smoke, HC, and CO emissions were found to be lower at 34°bTDC by 26.2%, 19.2%, and 21.5% respectively, with the same strategy. A slight increase in CO2 emission by 1.62% was noticed at 500 bar injection pressure at this injection timing compared to single injection mode.
Article
Energy & Fuels
Diming Lou, Yajuan Chen, Yunhua Zhang, Kunyou Jue, Piqiang Tan, Zhiyuan Hu, Liang Fang
Summary: In this study, a self-defined transient cycle is used for the soot loading test and combined with 1D simulations to reveal the temperature and pressure characteristics of Catalyzed Diesel Particulate Filter (CDPF) during the soot loading and regeneration process. The results show that the initial soot loading amount and exhaust flow rate have a significant effect on the pressure drop of CDPF. The soot combustion process can be divided into two stages based on the soot oxidation speed.
Article
Energy & Fuels
Seoksu Moon, Omer Faruk Atac, Gyuhan Bae, Jeonghwan Park
Summary: This study investigates the effects of injection pressure and fuel on the ballistic and linear injection characteristics of a gasoline direct injection injector. The results show that the injection pressure and fuel have more complex and dramatic effects in the ballistic regime, causing changes in needle dynamics and reversal stage appearance at longer injection pulse durations.
Article
Energy & Fuels
Chen Li, Zhixia He, Wei Guan, Genmiao Guo, Tianyang Bai, Bihe Hu
Summary: The study utilizes high-speed microscope imaging technology to capture the complex multiphase flow and near-field spray in the fuel injection process. The submerged jet experiment is used to eliminate air influence and investigate the phenomenon of air back suction. The results show that the submerged jet experiment does not change the internal flow field but can eliminate the influence of air and observe the movement of cavitation bubbles under pressure difference.
Article
Thermodynamics
Yoshinari Kobayashi, Shota Nozaki, Hiroaki Hayashi, Tadayoshi Ihara, Shuhei Takahashi
Summary: This study proposes a novel method to reduce pressure oscillation in high-load HCCI combustion by injecting air into homogeneous mixtures before compression, creating a local fuel concentration gradient.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Article
Thermodynamics
Ziming Yang, Fushui Liu, Yikai Li
Summary: The study found that moderate injection pressures can create the most favorable conditions for the generation of yellow flames, improving cold start performance of compression ignition engines. Additionally, a cold start strategy was proposed by controlling the compression-end temperature in the cylinder.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2021)