• 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 Investigations of an Icing Protection System for UAVs 

      Hann, Richard; Borup, Kasper Trolle; Zolich, Artur Piotr; Sørensen, Kim Lynge; Vestad, Håvard Nitter; Steinert, Martin; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)
      UAV icing is a severe challenge that has only recently shifted into the focus of research. Today, there are no mature icing mitigation technologies for UAVs, except for the largest fixed-wing drones. We are working on the ...
    • Experimental Investigations of an Icing Protection System for UAVs 

      Hann, Richard; Borup, Kasper Trolle; Zolich, Artur Piotr; Sørensen, Kim Lynge; Vestad, Håvard Nitter; Steinert, Martin; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)
    • Modelling of a Solenoid Injector for Internal Combustion Engines and Simulation Using the Bond Graph Methodology 

      Gaucherand, Jessica; Pedersen, Eilif; Netzer, Corinna; Løvås, Terese (Peer reviewed; Journal article, 2023)
      In internal combustion engines, fuel injection timing, injection rate and pressure is optimized to ensure suitable combustion and reduce emissions. Injectors are complex systems where mechanical, electromagnetic, and fluid ...
    • 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 ...
    • Strategies on Methane Slip Mitigation of Spark-Ignition Natural Gas Engine during Transient Motion 

      Tavakoli, Sadi; Schramm, Jesper; Pedersen, Eilif (Peer reviewed; Journal article, 2021)
      The liquefied natural gas (LNG)-fueled ships were provisioned to meet the strict emission legislation in the marine application since 2000. However, the scientific approach of burning the low-emission natural gas in lean ...
    • UAV Icing: Ice Accretion Experiments and Validation 

      Hann, Richard (Journal article; Peer reviewed, 2019)
      Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans ...
    • UAV Icing: Icing Cases for Validation of Path Planning Method 

      Cheung, Michael; Hann, Richard; Johansen, Tor Arne; Stovner, Bård Nagy (Peer reviewed; Journal article, 2023)
      As part of the complete solution to deal with atmospheric in-flight icing on unmanned aerial vehicles (UAV), a path planner is a valuable tool for finding an optimal path for accomplishing UAV missions. When considering ...
    • UAV Icing: Intercycle Ice Effects on Aerodynamic Performance 

      Wallisch, Joachim; Hann, Richard (Peer reviewed; Journal article, 2023)
      Atmospheric in-flight icing poses a challenge to all aircraft including unmanned aerial vehicles (UAVs). Aircraft should avoid icing conditions unless they have ways of mitigating the negative effects of icing, e.g., if ...