Potential improvement in combustion and pollutant emissions of a hydrogen-enriched rotary engine by using novel recess configuration

Article Energy & Fuels

Effect of hydrogen enrichment on the flame propagation, emissions formation and energy balance of the natural gas spark ignition engine

Xingyu Sun et al.

Summary: Adding hydrogen to natural gas in spark ignition engines improves combustion rate, thermal efficiency, and emissions control.

FUEL (2022)

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Article Energy & Fuels

Understanding the role of turbulence-induced blade configuration in improving combustion process for hydrogen-enriched rotary engine

Cheng Shi et al.

Summary: The effects of turbulence-induced blade (TIB) configuration on ignition, combustion process, and emission performance in rotary engines were investigated using numerical simulations. The results show that introducing TIB improves turbulent flow, with the leading-blade rotor chamber exhibiting better combustion and emission characteristics. The TIB configuration has a greater impact on combustion improvement in pure gasoline engines.

FUEL (2022)

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Article Energy & Fuels

Parametric analysis of hydrogen two-stage direct-injection on combustion characteristics, knock propensity, and emissions formation in a rotary engine

Cheng Shi et al.

Summary: The study explores a novel hydrogen injection strategy to improve the efficiency and reduce emissions of gasoline rotary engines. Through CFD modeling and experimental validation, it was found that two-stage direct-injected hydrogen significantly improves combustion characteristics and thermal efficiency.

FUEL (2021)

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Article Chemistry, Physical

Research on the hydrogen injection strategy of a direct injection natural gas/hydrogen rotary engine considering apex seal leakage

Baowei Fan et al.

Summary: The present paper investigates the impact of hydrogen injection strategy on the combustion performance of a natural gas/hydrogen rotary engine. A 3D dynamic simulation model considering ASL was established, and it was found that HIA and HIT could alter hydrogen distribution, affecting combustion efficiency.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

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Article Energy & Fuels

Numerical simulation on the combustion and NOx emission characteristics of a turbocharged opposed rotary piston engine fuelled with hydrogen under wide open throttle conditions

Jianbing Gao et al.

Summary: Hybrid vehicles are gaining attention due to environmental concerns, and Opposed Rotary Piston (ORP) engines are seen as a promising power source for these vehicles. Research on a turbocharged ORP engine fueled with hydrogen revealed high volumetric efficiency and excellent torque characteristics, with a maximum indicated power density significantly higher than turbocharged four-stroke reciprocating engines fueled with gasoline.

FUEL (2021)

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Article Energy & Fuels

Experimental and numerical study on the effect of single-hydroxybenzene/n-heptane blends on engine combustion and particulate emissions

Haozhong Huang et al.

Summary: The study examines the impact of single-hydroxybenzene/n-heptane blended fuel on engine performance and particle emission characteristics to identify an optimal composition for a model diesel fuel. Among the tested fuels, the n-butylbenzene/n-heptane blend shows the closest effects to pure diesel (D100) in terms of engine performance and particle emissions, making it suitable for modeling purposes.

FUEL (2021)

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Article Energy & Fuels

Experimental and numerical study of combustion and emissions performance in a hydrogen-enriched Wankel engine at stoichiometric and lean operations

Cheng Shi et al.

Summary: Based on experimental and numerical simulations, the addition of hydrogen in a retrofitted Wankel engine was found to increase combustion temperature and pressure, optimizing combustion processes and improving engine stability. However, it also led to increased nitrogen oxide emissions, which could be mitigated by diluting the mixture.

FUEL (2021)

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Article Thermodynamics