Liquid Sprays Characteristics in Diesel Engines

Martínez-Martínez, Simón; Sanchez, Fausto; Bermúdez, Vicente; Riesco-Ávila, J.M.

doi:10.5772/9724

Cited by 9 publications

(7 citation statements)

References 68 publications

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“…The cone angle is defined as the angle formed by two straight lines that start from the exit orifice of the nozzle and tangent to the spray outline in a determined distance. Martínez et al [30] proposed an empirical equation as follows:…”

Section: A Materialsmentioning

confidence: 99%

Influences of heating temperatures on physical properties, spray characteristics of bio-oils and fuel supply system of a conventional diesel engine

Hoang

Pham²

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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Alternative fuels need to satisfy the strict requirements of the use for diesel engines aiming at enhancing the performance and reducing pollutant emissions. The use of straight bio-oils for diesel engines entails improving their disadvantages such as high density, high surface tension and kinematic viscosity (tri-physical parameters). There have been some as-used methods for reduction of the above-mentioned negative effects related to straight bio-oil disadvantage, however, the adequately-heating method may be considered as a simple one helping the physical parameters of straight bio-oils to reach stable and highly-confident values which are close to those of traditional diesel fuel. As a consequence, the spray and atomization, combustion, performance, and emissions of diesel engines fueled with preheated bio-oils are improved. In this work, a study of the dependence of the density, surface tension and kinematic viscosity of coconut oil (a type of bio-oils) on temperatures (from 40-110 o C) within a wide variety are conducted. In the first stage, the influence study of temperature on tri-physical parameters is carried out on the basis of experimental correlation and asdescribed mathematical equation. In the second stage, the influence study of tri-physical parameters on spray and atomization parameters including penetration length (L b) and Sauter mean diameter (SMD), and the influence of tri-physical parameters on fuel supply system are investigated. The optimal range of temperature for the as-used bio-oils is found after analyzing and evaluating the obtained results regarding the physical properties and spray characteristics, as well as compared with those of diesel fuel. The confident level over 95% from the regression correlation equation between the above-mentioned tri-physical parameters and temperature is presented. Additionally, the measured spray parameters, the calculated values of frictional head loss and fuel flow rate are thoroughly reported.

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Section: A Materialsmentioning

confidence: 99%

Influences of heating temperatures on physical properties, spray characteristics of bio-oils and fuel supply system of a conventional diesel engine

Hoang

Pham²

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…Experimentally different regimes including optomechanics in picocavities [1], vibrational ultra-strong coupling for chemical systems [2], strong coupling of surface plasmon polaritons and molecular vibrations [3], and the anomalous Raman response under strong light-matter coupling [4] have been explored. Theoretically, such strong coupling has been analyzed for cavity-controlled chemistry via a polaron-decoupling [5], vibrationally dressed polaritons [6], for polaritonic chemistry [7,8], spectroscopy [9] or changes in the ground-state under ultra-strong coupling [10].…”

mentioning

confidence: 99%

Cavity-Correlated Electron-Nuclear Dynamics from First Principles

2018

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The rapidly developing and converging fields of polaritonic chemistry and quantum optics necessitate a unified approach to predict strongly correlated light-matter interactions with atomic-scale resolution. Toward this overarching goal, we introduce a general time-dependent density-functional theory to study correlated electron, nuclear, and photon interactions on the same quantized footing. We complement our theoretical formulation with the first ab initio calculation of a correlated electron-nuclear-photon system. For a CO_{2} molecule in an optical cavity, we construct the infrared spectra exhibiting Rabi splitting between the upper and lower polaritonic branches, time-dependent quantum-electrodynamical observables such as the electric displacement field, and observe cavity-modulated molecular motion. Our work opens an important new avenue in introducing ab initio methods to the nascent field of collective strong vibrational light-matter interactions.

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“…If the water is present in biodiesel this reaction cannot be removed. There is always a little water and there is always a soap that is formed when biodiesel is produced [8,10]. However is a possibility when are used solid (heterogenous) catalysts which do not give the free metal ions necessary to form soap.…”

Section: Saponification Indexmentioning

confidence: 99%

Considerations on the combustion of biofuels in compression ignition engines

et al. 2019

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Biofuels are considered to be attractive alternative fuels due to rising oil prices and the depletion of fossil sources. It is produced by a process of transesterification of vegetable oils and animal fats with an alcohol in the presence of a catalyst. At present, biodiesel and bioethanol are considered solutions, and almost all EU countries have prepared a policy on the production and use of biodiesel in the transport and heating sectors. Biodiesel has certain advantages, such as a higher number of cetan, biodegradability, low sulfur content and aromatic content, and lower carbon monoxide emissions, unburned hydrocarbons and particulate matter. One of the main issues related to biodiesel and biodiesel blends is the high viscosity of the fuel. Among the biodiesel properties, density, viscosity and heating value affect engine performance and emission characteristics. The presented paper highlights the differences that occur in comparison to the classical fuels and the performances obtained when using biodiesel.

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Liquid Sprays Characteristics in Diesel Engines

Cited by 9 publications

References 68 publications

Influences of heating temperatures on physical properties, spray characteristics of bio-oils and fuel supply system of a conventional diesel engine

Influences of heating temperatures on physical properties, spray characteristics of bio-oils and fuel supply system of a conventional diesel engine

Cavity-Correlated Electron-Nuclear Dynamics from First Principles

Considerations on the combustion of biofuels in compression ignition engines

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