Sökning: "ljuddämpare"
Visar resultat 6 - 10 av 28 uppsatser innehållade ordet ljuddämpare.
6. IC-Engine Source Characterisation and exhaust system simulations
Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWLSammanfattning : To be able to predict the sound pressure level emitted by a exhaust system one must be able to describe the source. The source in the form of an engine can linearly be described as a source strength and a source impedance. An IC-engine can acoustically have a non-linear part meaning that the source characteristics have a dependency on the load. LÄS MER
7. Konstruktion av avgassystem till MC i syfte att förbättra dess motorkaraktär
Kandidat-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : Detta kandidatexamensarbete behandlar design och konstruktion av ett nytt avgassystem för en motorcykel. Utvecklingen grundar sig på resultat från en körning i bromsbänk av motorcykeln utrustad med original avgassystem, där det visar sig att det finns en påtaglig dipp i vridmoment mellan 4000 och 6500 rpm. LÄS MER
8. Simulating flow-noise for after-treatment systems
Master-uppsats, KTH/Teknisk mekanikSammanfattning : Modern silencers for heavy vehicle applications are designed to cancel out the sound generated by the effects of combustion and propagation of exhaust gases through the engine after-treatment system. The complex geometry within the compact silencer give rise to self generated (or flow-) noise that contribute to the total sound power radiated at the exhaust outlet. LÄS MER
9. Water blow out phenomena inside a heavy truck silencer
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : NOx sensors have become salient components in the development of efficient exhaust after treatment system for heavy duty vehicles in the past few years. When the accumulated water inside the silencer splashes on to the NOx sensor, it can cause permanent cracks in the sensor. LÄS MER
10. CFD Simulation of Urea Evaporation in STAR-CCM+
Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningsläraSammanfattning : Diesel engines produce large amounts of nitrogen oxides (NOX) while running. Nitrogen oxides are highly toxic and also contribute towards the formation of tropospheric ozone. LÄS MER