Blar i NTNU Open på forfatter "Emberson, David"
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Detailed Study of LED Diffuse Back Illumination for Soot Measurements in an Optical Combustion Chamber
Olsen, Mathias Solberg (Master thesis, 2017)An optical accessible compression ignition engine is under development at the engine suite at EPT, NTNU. The purpose of the new optical engine is to measure soot formation during the combustion process. In the search of ... -
Diffuse Back-Illuminated Extinction Imaging of Soot: Effects of Beam Steering and Flame Luminosity
Bjørgen, Karl Oskar Pires; Emberson, David; Løvås, Terese (Journal article; Peer reviewed, 2019)This study presents diagnostic development of diffuse backilluminated extinction imaging of soot. The method provides high temporal and spatial resolution of the line-of-sight optical density of soot (KL) in compression-ignited ... -
Experimental Study of Ignition Delay, Combustion, and NO Emission Characteristics of Hydrogenated Vegetable Oil
Krivopolianskii, Vladimir; Bjørgen, Karl Oskar Pires; Emberson, David; Ushakov, Sergey; Æsøy, Vilmar; Løvås, Terese (Journal article; Peer reviewed, 2019)In this article, a comparative study of hydrogenated vegetable oil (HVO) and diesel was performed in two constant volume combustion rigs and an optical accessible compression-ignited chamber (OACIC). Ignition, combustion, ... -
Investigation of Compression Ignition Combustion of Glycerol-Diesel Fuel Emulsions
Wyndorps, Jan (Master thesis, 2019)With Biodiesel production having established in the past century, there is an ongoing interest to add value to its abundant by-product glycerol. With regard to a shortly closed product cycle, its utilisation in the fuel ... -
On Soot Sampling: Considerations when Sampling for TEM Imaging and Differential Mobility Spectrometer
Emberson, David; Rohani, Behzad; Wang, Liang; Sæterli, Ragnhild; Løvås, Terese (Journal article; Peer reviewed, 2019)Particulate matter (PM) has been sampled from a compression ignition engine using a differential mobility spectrometer (Cambustion DMS 500) and for imaging in a transmission electron microscope (TEM) with the aim of coupling ... -
Optical Measurements of In-Flame Soot in Compression-Ignited Methyl Ester Flames
Bjørgen, Karl Oskar Pires; Emberson, David; Løvås, Terese (Journal article; Peer reviewed, 2019)This study investigates in-flame sooting characteristics of biodiesel surrogates in compression-ignited spray flames. The aim of the study is to produce reliable experimental data on in-flame soot for validation of kinetic ... -
Varying Ignition Quality of a Fuel for a HCCI Engine Using a Photochemically-Controlled Additive: The Development of a ‘Smart’ Fuel
Emberson, David; Sandquist, Judit; Løvås, Terese; Schönborn, Alessandro; Saanum, Inge (Peer reviewed; Journal article, 2021)This study examines the possibility to provide control over ignition timing in a homogeneous charge compression ignition engine (HCCI) using a fuel additive whose molecular structure can be adapted upon exposure to UV ...