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

Cheng, Shen; Zhang, Peng; Ji, Changwei; Di, Liming; Zhu, Zhaojun; Wang, Huaiyu

doi:10.1016/j.fuel.2022.123807

Cited by 41 publications

(5 citation statements)

References 51 publications

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“…The entrainment effect between the spray edge and the surrounding gas can be enhanced and improve the breakup and atomization of the fuel spray. 33 Therefore, the atomization mixing quality of different fuels presents D100 < B20 < P20 < DMF20, which is in good agreement with the experimental results of spray characteristics described above.…”

Section: Effect Of Fuel Property On Macroscopic Spray Characteristicssupporting

confidence: 88%

Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Bao

Wang

et al. 2023

Energy Science & Engineering

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Under high ambient pressure (5 MPa) and different injection pressures (90, 120, and 150 MPa), a high‐speed imaging technique was carried out to comparatively investigate the macroscopic spray characteristics of diesel with three different types of blended fuel in a constant volume chamber. The oxygenated fuels were n‐butanol (B), pine oil (P), and 2,5‐dimethylfuran (DMF). All their blending ratio with diesel were 20%. Results showed that less viscosity could be improved the spray characteristics of the fuel in the range of experimental conditions. Then, the tested fuels had a longer penetration and a greater spray area with increasing the injection pressure from 90 to 150 MPa. On the other hand, the percentage increases in the mean spray cone angle of D100, B20, P20, and DMF20 were 3%, 4.4%, 2.4%, and 2.9%, respectively. At the same experimental condition, the spray penetrations of DMF20 and P20 were larger than that of D100, but the spray penetration of B20 was basically similar to D100. Besides, the performance of the spray cone angle and spray area were D100 < B20 < P20 < DMF20. In addition, the comprehensive influence was that blending oxygenated fuels would be a benefit for developing fuel atomization and the air–fuel mixture of conventional diesel fuel.

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Section: Effect Of Fuel Property On Macroscopic Spray Characteristicssupporting

confidence: 88%

Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Bao

Wang

et al. 2023

Energy Science & Engineering

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“…The engine's main technical parameters are shown in Table 1 [28]. In this paper, the vibe heat release model is used for combustion heat release [24], and the calculation formula is as follows: The heat transfer model is used to calculate heat loss, and the complicated heat transfer process is transformed into a heat transfer coefficient model. According to the instantaneous average heat transfer coefficient of the working medium to the cylinder wall [30], the heat transfer coefficient of working medium to the cylinder wall is calculated as follows:…”

Section: Df Engine Modeling Methodologymentioning

confidence: 99%

“…It indicates that the established one-dimensional (1-D) GT-power model runs accurately in gas mode. The errors between the simulation values and experimental values of the main parameters are within 2%, which indicates that the established 1-dimensional simulation model can be used for further studies [24]. The factory test report [28] was referred to.…”

Section: Simulation Model Of the Df Enginementioning

confidence: 99%

“…The results show that the MOGA provides more feasible pareto optimality [23]. Stoumpos used GT-Power simulation software to establish a marine fourstroke DF engine model with multiple Wiebe functions in order to study the transient response of the engine when the mode switches and load changes and optimized it with MOGA [24]. Response surface method (RSM) is relatively simple and reliable, and has a good alternative effect, so it is applied more often in marine engines.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Optimization of the Flue Gas Heat Recovery of a Marine Dual-Fuel Engine Based on RSM and GA

2022

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Implementation of flue gas waste heat recovery is an effective way to improve the energy utilization of marine engines. This paper aims to model and optimize a marine four-stroke dual-fuel (DF) engine coupled with a flue gas waste heat recovery system. Firstly, the DF engine and waste heat recovery system were respectively modeled in GT-Power and Simulink environments and verified with experimental data. Then, a regression model was built using the response surface method, with the intake temperature, compression ratio, and pilot fuel injection timing as input parameters and parametric analysis was performed. Finally, multi-objective optimization of the waste heat recovery system was performed using a genetic algorithm. The result showed that the optimal solution is obtained when the intake temperature is 306.18 K, the geometric compression ratio is 14.4, and the pilot fuel injection timing is −16.68 °CA after the top dead center. The corresponding brake-specific fuel consumption was 155.18 g/kWh, reduced by 3.24%, and the power was 8025.62 kW, increased by 0.32%. At the same time, 280.98 kW of flue gas waste heat generation was obtained.

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“…At present, many new solutions have been proposed to improve the incomplete combustion of WREs [12]. For example, the design of combustion chamber was optimized, the direct injection (DI) technology was adopted, and the flame propagation speed was improved by burning gas fuels such as hydrogen [13][14][15] and natural gas [16,17]. In addition, the lean burn and chamber optimization promise many advantages to improve the performance and combustion characteristics of WREs [18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of In-Cylinder Low-Pressure Direct Injection Strategy on the Atomization and Combustion Process of a Small-Scaled Gasoline Wankel Rotary Engine

Liu

Huang

et al. 2023

International Journal of Energy Research

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To solve the problem of poor atomization and combustion in a small-scaled gasoline Wankel rotary engine (WRE) with low-pressure port injection mode, the numerical simulation was used to optimize the injection strategy. Firstly, the effects of in-cylinder temperature and pressure on gasoline atomization characteristics were studied, and the optimal injection timing was determined. Based on this, the influence of injection position, injection angle, and installation direction on the atomization, fuel-air mixing, and combustion processes of low-pressure direct injection (DI) small-scaled gasoline WRE was investigated. The results show that the injection angle is a key factor in determining the gasoline atomization characteristics. Injecting along the direction of rotor rotation causes the impingement between fuel bundle and combustion chamber pocket, resulting in the smaller Sauter mean diameter (SMD) and liquid penetration length (LPL). The installation direction of nozzle plays an important role in the airflow movement. When the nozzle is vertical-installed, the airflow repeatedly crosses to form multiple eddies, making the fuel to move more easily towards the front of combustion chamber. When the nozzle is parallel-installed at the lower edge of the installing zone and injecting along the direction of rotor rotation, the peak in-cylinder pressure is the largest and increased by 21% compared to the original port injection. By this injection strategy, the problem of incomplete combustion for the studied small-scaled gasoline WRE could be almost completely solved.

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

Cited by 41 publications

References 51 publications

Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Modeling and Optimization of the Flue Gas Heat Recovery of a Marine Dual-Fuel Engine Based on RSM and GA

Effect of In-Cylinder Low-Pressure Direct Injection Strategy on the Atomization and Combustion Process of a Small-Scaled Gasoline Wankel Rotary Engine

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