نتایج جستجو برای: soot combustion

تعداد نتایج: 32991  

One of the main controlling parameters in diesel engine combustion is the fuel – air mixing process that has direct effects on engine performance and pollutant emissions, reviewing over previous literature showed that split injection strategies could satisfy this purpose very well. For the first time and in this paper, pilot and double injection strategies were combined and formed new triple in...

Amir Hossein Shamekhi Ehsan Samadani Mohammad Hassan Behroozi Reza Chini

Diesel engine emission standards are being more stringent as it gains more publicity in industry and transportation. Hence, designers have to suggest new controlling strategies which result in small amounts of emissions and a reasonable fuel economy. To achieve such a target, multi-objective optimization methodology is a good approach inasmuch as several types of ...

ژورنال: تحقیقات موتور 2020

The scarceness of non-renewable energies, rising fossil fuels prices, as well as strict environmental regulations have forced many researchers to focus on utilizing environmentally friendly renewable energies such as biogas in internal combustion engines. Variety in raw materials and process of biogas production results in different components and percentages of various elements, including meth...

2010
Fernando Lopez-Parra

The main objective of the work presented in this paper will be to present and discuss the development and implementation of a numerical model to simulate soot formation and depletion in turbulent diffusion flames. The relevance of such model lays on the importance of tying the formation of soot to the ongoing reaction mechanism so that it is fully integrated into the combustion process. The mod...

Journal: :Catalysis Today 2022

Co, Ce and Co-Ce nanofibers were synthesized by the electrospinning method. To obtain mixed fibers, Co was incorporated in two ways: one step synthesis sequential synthesis. Nanofibers applied to reactions: gas-solid (CO oxidation) solid-solid-gas (combustion of diesel soot). Different activity trends observed both reactions. For soot combustion, more active either than or nanofibers. CO oxidat...

2017
Gianluigi De Falco Chiara Colarusso Michela Terlizzi Ada Popolo Michela Pecoraro Mario Commodo Patrizia Minutolo Mariano Sirignano Andrea D’Anna Rita P. Aquino Aldo Pinto Antonio Molino Rosalinda Sorrentino

Chronic obstructive pulmonary disease (COPD) is considered the fourth-leading causes of death worldwide; COPD is caused by inhalation of noxious indoor and outdoor particles, especially cigarette smoke that represents the first risk factor for this respiratory disorder. To mimic the effects of particulate matter on COPD, we isolated peripheral blood mononuclear cells (PBMCs) and treated them wi...

2006
MJ Lewis PA Rubini

The paper describes a methodology for the field modelling of non-charring flame spread over representative solid surfaces. Coupled descriptions of the controlling mechanisms of buoyancydriven flow, combustion, soot production, radiation heat transfer and solid pyrolysis are incorporated into a fire-specific CFD code. The approach is evaluated at sub-model level and in a room corner fire configu...

Journal: :Faraday discussions 2017
Joseph C Charnawskas Peter A Alpert Andrew T Lambe Thomas Berkemeier Rachel E O'Brien Paola Massoli Timothy B Onasch Manabu Shiraiwa Ryan C Moffet Mary K Gilles Paul Davidovits Douglas R Worsnop Daniel A Knopf

Anthropogenic and biogenic gas emissions contribute to the formation of secondary organic aerosol (SOA). When present, soot particles from fossil fuel combustion can acquire a coating of SOA. We investigate SOA-soot biogenic-anthropogenic interactions and their impact on ice nucleation in relation to the particles' organic phase state. SOA particles were generated from the OH oxidation of napht...

2000

“X-Ray Vision”: Taking a Hard Look at Fuel Sprays and Combustion Argonne researchers are collaborating on a close-up study of diesel spray patterns and soot formation using the Advanced Photon Source here at the Laboratory. The APS makes it possible for scientists to examine these phenomena closer than ever before. The knowledge gained could lead to better-performing, loweremission injectors fo...

Journal: :Applied optics 2005
Christopher B Stipe Donald Lucas Catherine P Koshland Robert F Sawyer

A two-laser technique is used to study laser-particle interactions and the disintegration of soot by high-power UV light. Two separate 20 ns laser pulses irradiate combustion-generated soot nanoparticles with 193 nm photons. The first laser pulse, from 0 to 14.7 J/cm2, photofragments the soot particles and electronically excites the liberated carbon atoms. The second laser pulse, held constant ...

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