Sökning: "Combustion monitoring"
Visar resultat 1 - 5 av 40 avhandlingar innehållade orden Combustion monitoring.
1. Development and Application of Non-linear Mid-infrared Laser Spectroscopy for Combustion Diagnostics
Sammanfattning : The work reported in this thesis involved the development and application of two novel infrared non-linear laser techniques, namely mid-infrared polarization spectroscopy (IRPS) and mid-infrared degenerate four-wave mixing (IR-DFWM) to combustion diagnostics. These two techniques meet the needs of species concentration detection in combustion environments, especially for those species lacking accessible electronic (one-photon) transitions in the ultraviolet (UV) or visible spectral region. LÄS MER
2. Detecting, Modelling and Measuring Disturbances in Fixed-bed Combustion
Sammanfattning : Combustion of fixed fuel beds in grate furnaces is one of the most common techniques within production of heat and power from solid fuels. The grate furnace used to be a working horse for combustion of hard coal, while today the incitement of using renewable fuel sources has turned biomass and municipal waste into dominating fuel types. LÄS MER
3. Environmental records of carbonaceous fly-ash particles from fossil-fuel combustion
Sammanfattning : Fossil fuel combustion produces fly-ash particles that are released into the atmosphere and deposited in the environment. A particularly characteristic kind of fly-ash is spheroidal carbonaceous particles. They are composed of an amorphous carbon matrix in which other elements are dispersed. LÄS MER
4. Laser Spectroscopic Techniques for Combustion Diagnostics Directed Towards Industrial Applications
Sammanfattning : In the work presented in the thesis, different laser spectroscopic techniques were utilized for measurement of species concentrations, as well as for surface thermometry. Experiments were conducted in various combustion environments, ranging from laboratory burners to truck-sized internal combustion (IC) engines, gas turbine combustors and a full-size aircraft turbofan engine. LÄS MER
5. Laser Diagnostic Techniques with Ultra-High Repetition Rate for Studies in Combustion Environments
Sammanfattning : When conducting laser based diagnostics in combustion environments it is often desirable to obtain temporally resolved information. This can be due to several factors such as combustion taking place in a turbulent flow field, flame propagation from a spark plug in an initially quiescent combustible mixture, or rapid, multi-point fuel consumption in a homogeneous charge as a result of compression ignition in an engine cycle. LÄS MER
