Sökning: "Vehicle acoustics"
Visar resultat 1 - 5 av 13 uppsatser innehållade orden Vehicle acoustics.
1. Development of a Low Noise Drone Propeller Using CFD Simulations
Master-uppsats, Lunds universitet/Institutionen för energivetenskaperSammanfattning : Noise pollution generated by drones has in recent years become a concern for humans and wildlife and has in some regions resulted in regulatory backlash. This thesis investigates the possibilities of developing a low noise drone propeller using computational fluid dynamics (CFD) simulations. LÄS MER
2. Empirical Verification of an Acoustic Estimation of a Rocket Engine : A Comparison Between Estimated and Measured Noise of a Rocket Engine
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : The noise of a rocket engine is a complex and complicated phenomenon which has been studied for more than half a century [1]. There are many sources to this noise, but due to its great potential impact to the surrounding structures, including the vehicle itself, it is important to have a model to estimate the acoustic environment the engine produces. LÄS MER
3. Accuracy verification of GT-Power model and reduction of computational time
Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWLSammanfattning : The noise produced by any new vehicles is tightly regulated by the European Union which have developed a standardised method for measuring the emitted noise of new vehicles. The method involves a vehicle driving past carefully positioned microphones at a specific range of engine speeds. LÄS MER
4. Estimation of blocked forces from a rear drive unit (RDU) in a test rig fixture
Master-uppsats, KTH/Teknisk akustikSammanfattning : In the modern world, vehicle manufacturers are not the sole producer of every component in a vehicle but instead assign different subsystems to various OEMs (Original Equipment Manufacturer). Subsystems such as Rear Drive Units (RDU), Power Transfer Units (PTU), E-drives etc. are developed separately and then integrated into the main vehicle. LÄS MER
5. Development of Acoustic Simulation Methods for Exhaust Systems
Master-uppsats, KTH/Optimeringslära och systemteoriSammanfattning : Noise pollution is a growing concern due to its harmfulness to human health. Heavy vehicles powered by internal combustion engines stands for a major part of the environmental noise, why noise reduction is an increasing priority in enginve development. LÄS MER