Effects of boiling heat transfer on the performance enhancement of a medium speed diesel engine fueled with diesel and rapeseed methyl ester

Zhang, Zhiqing; Jiaqiang, E; Chen, Jingwei; Xin, Zhao; Zhang, Bin; Deng, Yuewen; Peng, Qingguo; Yin, Zhiwei

doi:10.1016/j.applthermaleng.2020.114984

Cited by 69 publications

(31 citation statements)

References 49 publications

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“…The fresh air mass and exhaust gas recirculation mass are obtained from experimental measurement. The residual gas mass and the short-circuit mass can be calculated by an emptying and simple filling model [10]. Thus, the mass fraction at EVO can be calculated as: When the exhaust valve opens, the mass fraction can be calculated as:…”

Section: Mathematic Modelingmentioning

confidence: 99%

“…To ensure the simulation result in accord with the actual cumulative blow-by, C d is should be adjusted with experimental results [10]. In addition, the flow area of equivalent cylinders is calculated by the following equation [36]:…”

Section: Mathematic Modelingmentioning

confidence: 99%

“…0.8 (10) where α w is the heat transfer rate, W/(m•K); T c is the engine cylinder temperature, K; C m is the mean piston velocity, m 2 ; p c is the cylinder pressure, Pa; D is the cylinder diameter, m; T IVC is the cylinder temperature when the inlet valve closes, K; V is the engine cylinder volume, m 3 ; p c,o is the inverted cylinder pressure, Pa; p IVC is the cylinder pressure when the inlet valve closes, Pa; a is a curve fitted constant; C 1 is the gas velocity coefficient; C 2 is the model constant.…”

Section: ) Heat Transfer Modelmentioning

confidence: 99%

“…It needs thorough theory and experimental study when biodiesel has been widely applied and realized highly effective and pure burning in the engine [9]. In addition, improvements in diesel energy efficiency and emission can be obtained in some areas of design and operation [10]. Meanwhile, many scholars and engine manufactures have developed many methods to reduce the emission and improve engine efficiency [11].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Swirl and Boiling Heat Transfer on the Performance Enhancement and Emission Reduction for a Medium Diesel Engine Fueled with Biodiesel

Tan

Chen

et al. 2021

Processes

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In order to improve the accuracy of numerical simulation, a new heat transfer model is developed by using a modular approach in the Anstalt für Verbrennungskraftmaschinen (AVL)-Boost software. The improved heat transfer model mainly considers the effects of the swirl and boiling heat transfer inside the engine. In addition, a chemical kinetics mechanism including 475 reactions and 134 species is employed to predict the combustion of diesel engines fueled with biodiesel. The result shows that the boiling heat transfer will occur, especially in the high-temperature area. Analysis shows that the improved model is reliable and its precision is increased. Finally, the perturbation method is employed to investigate the relatively important inputs as the complex nonlinear function with a lot of output data and input data produced by the improved model. The relative effects of different parameters such as EGR, injection mass, injection timing, compression ratio, inlet air pressure, fuel injection pressure, exhaust pressure and inlet air temperature on performance and emission characteristics are compared. The eight parameters are investigated on four outputs of brake power, Brake Specific Fuel Consumption (BSFC), NOx and HC. The injected fuel mass plays an important role in emissions and performance. The EGR, compression ratio and inlet air pressure have a great effect on the HC and NOx emission.

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Section: Mathematic Modelingmentioning

confidence: 99%

Section: Mathematic Modelingmentioning

confidence: 99%

Section: ) Heat Transfer Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Swirl and Boiling Heat Transfer on the Performance Enhancement and Emission Reduction for a Medium Diesel Engine Fueled with Biodiesel

Tan

Chen

et al. 2021

Processes

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“…The emission, especially the particle matter from the diesel engine, is the main source of air pollution [4,5], which seriously affects people's physical and mental health and quality of life, but also hinders the sustainable development of the city [6][7][8]. Thus, controlling the exhaust pollution of the diesel engine to protect the atmospheric environment has become an important issue and strategic task for the international automobile industry to spend a lot of human [9], financial [10,11], and material resources [12]. The improvement of the emission control technology for the diesel engine can improve the environmental quality [12][13][14][15], complete the integrity and stability of the ecosystem [13,14], and promote the high integration with environmental protection [15] and economic society [16].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Gas-Soot Flow Distribution Characteristic of Soot Capture Process in the Wall-Flow Diesel Particulate Filter

Tan

2021

International Journal of Aerospace Engineering

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In order to investigate the distribution characteristics of gas-particle two-phase flow in the diesel particulate filter in the capture process, a mathematical model of gas-particle two-phase flow for inside-and-outside filter had been established in the capture process according to the mass conservation equation, momentum conservation equation, and k-ε turbulence equation. The model verification was carried out with the experimental and simulated of flow distribution characteristics of gas-particle two-phase. The obtained results showed that the static pressure gradient along the radial distribution was greater at the inlet of the filter in capture process in the diesel particulate filter, which could easily lead to causing eventual fatigue damage due to stress concentration in the front-end of filter; moreover, the weaker the vortex strength of gas-particle formed in expansion pipe was, the better uniformity of flow velocity and soot concentration distribution were. Therefore, the established mathematical model can be used for predicting gas-particle flow velocity distribution in the diesel particulate filter.

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Compound passive heat transfer augmentation techniques: A comprehensive review

Al‐Chlaihawi,

Hasan,

Ekaid

2023

Heat Trans

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The function of energy is becoming increasingly vital in meeting the requirements of modern societies and sustaining rapid economic and industrial growth globally. Heat transfer equipment has been employed for heat recovery and conversion in various domestic and industrial applications. Therefore, due to the recent global energy crisis, boosting the thermal efficiency of energy systems has become an essential requirement, which would reduce both their size and rates of energy demand. There are active and passive methods for boosting heat transfer rates. As they have no moving components, passive methods are more affordable and dependable than active ones. Applying two or more passive techniques concurrently will result in a higher heat transmission rate than any approach working independently. The current article comprehensively reviews experimental and computational investigations of passive compound forced convection heat transfer augmentation techniques at laminar, transition, and turbulent flow regimes. This article focuses on compound techniques arrangement in the form of turbulators, typical twisted tapes (TTs), surface roughness, vortex generators, and so on. The pioneering research suggests that using a lower twist ratio, lower pitch, and smaller winglet angles in TTs can result in higher heat transfer rates, albeit with a slightly increased friction factor. The combination of alternate‐axes and wings in TTs leads to more effective heat transfer enhancement within the tube.

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Effects of boiling heat transfer on the performance enhancement of a medium speed diesel engine fueled with diesel and rapeseed methyl ester

Cited by 69 publications

References 49 publications

Effects of Swirl and Boiling Heat Transfer on the Performance Enhancement and Emission Reduction for a Medium Diesel Engine Fueled with Biodiesel

Effects of Swirl and Boiling Heat Transfer on the Performance Enhancement and Emission Reduction for a Medium Diesel Engine Fueled with Biodiesel

Investigation on Gas-Soot Flow Distribution Characteristic of Soot Capture Process in the Wall-Flow Diesel Particulate Filter

Compound passive heat transfer augmentation techniques: A comprehensive review

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