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| Author: | Sarjovaara, Teemu |
| Title: | Optical measurements of diesel fuel spray on medium speed engine |
| Publication type: | Licentiate thesis |
| Publication year: | 2011 |
| Pages: | 51 s. + liitt. Language: eng |
| Department/School: | Energiatekniikan laitos |
| Main subject: | Polttomoottoritekniikka (Kul-14) |
| Supervisor: | Larmi, Martti |
| Instructor: | |
| Location: | P1 Ark Aalto 9853 | Archive |
| Keywords: | diesel fuel spray optical measurements medium speed engine particle image velocimetry PIV dieselpolttoainesuihku optiset mittaukset keskinopea moottori |
| Abstract (eng): | This Licentiate's Thesis examines experimental approach to fuel spray of medium speed diesel engine. Fuel spray and its local conditions determine the emission generation on compression ignition engine, where the combustion is traditionally mixing controlled. Optical measurement methods offer excellent way to study highly turbulent fuel sprays both in optical engines and in chambers. The gathered results can be utilized to increase the knowledge of basic fuel spray physics, develop combustion process and to offer reference data for numerical simulations. There are a lot of reported optical measurements of diesel fuel spray and combustion, but they have concentrated on small high speed engines. There have been only few studies focusing on large bore engines. Large bore engines are more challenging to modify for optical measurements, since their dimensions and high cylinder pressures, and also the emission legislation have not been as strict as with smaller engines. The thesis presents measurements of medium speed engine's fuels spray. Two optical measurement methods are presented -particle image velocimetry (PIV) and backlight imaging. The measurements have been carried out in cold chambers and in optical engine. The results gathered for the chamber measurements have excellent quality while results from engine measurement did have some quality problem. But both measurement results offered valuable information from in-cylinder phenomena of large bore medium speed diesel engine. |
| ED: | 2011-05-31 |
INSSI record number: 42107
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