Essays about: "Thermoacoustic"

Showing result 1 - 5 of 8 essays containing the word Thermoacoustic.

1. 1. A numerical comparison of the thermoacoustics for different equivalence ratios for n-dodecane using LES

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Björn Jarfors; [2023]
   Keywords : Computational Fluid Dynamics; Bluff-body stabilised flames; Large Eddy Simulation; Thermoacoustics; Acoustics; NEUMANN Project; Jet engines; Aero engines; Airplanes; Combustion; Numerics; Technology and Engineering;

   Abstract : Klimatförändringarna påverkar vår värld och det behövs ett mer hållbart samhälle. Flygindustrin är i behov av förändring, men flygmotorer är mycket komplexa och tar tid att utveckla. Termoakustiska instabiliteter har kraften att förstöra en motor, men också att minska miljöpåverkan. READ MORE

3. 2. Investigation of Light and Ultrasound Injected Signals in Microphones

   University essay from Linköpings universitet/Elektroniska Kretsar och System

   Author : Robin Djerv; [2021]
   Keywords : LightCommands; DolphinAttack; MEMS Microphone; Signal Injection; Security;

   Abstract : Voice commanded systems (VCS) have been proved to be vulnerable to signal in- jections mimicking voice commands and explored security flaws in market avail- able products for the time of each respective study. Signal injection caused with the help of amplitude modulated ultrasonic waves (being known as DolphinAt- tacks - DA) were proved to work on several such devices in 2017. READ MORE

4. 3. Green Fuel Simulations

   University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Author : Daniel Gutiérrez; [2020]
   Keywords : Industrial gas turbines; Combustion instabilities; Computational fluid dynamics; Acoustics; COMSOL Multiphysics; Flame transfer function;

   Abstract : Many industries have entered a new global phase which takes the environment in mind. The gas turbine industry is no exception, where the utilization of green fuels is the future to spare the environment from carbon dioxide and NOx emissions. READ MORE

5. 4. Thermal Acoustic Flow inside an Ultrasound Resonator

   University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

   Author : Enrico Corato; [2020]
   Keywords : Microfluidics; Ultrasound; Acoustofluidics; Thermal gradient; Thermoacoustic; Technology and Engineering;

   Abstract : This thesis aims at investigating the interaction between thermal gradients and acoustic fields in microfluidic devices. In the research branch of Acoustofluidics, which bridges together acoustics and fluid dynamics, inhomogeneity in the medium has gained great interest due to the novel physics behind and the potential in manipulating submicrometer particles. READ MORE

6. 5. ThermoacousticInstabilities in a Gas Turbine Combustor

   University essay from KTH/MWL Marcus Wallenberg Laboratoriet

   Author : Karl Bengtsson; [2017]
   Keywords : ;

   Abstract : Stationary gas turbines are widely used today for power generation and mechanical drive applications. The introduction of new regulations on emissions in the last decades have led to extensive development and new technologies used within modern gas turbines. READ MORE