Combustion Measurements in a Heavy Fuel-Oil Furnace

1991

Two distinct heavy fuel oil (HFO) sprays were generated by a twin-fluid atomiser, for differing atomising air to fuel ratios and investigated under non-reacting conditions in a spray test rig in which their radial mass distribution and mean droplet size and distribution were determined. Both sprays exhibit solid cone type distributions in their atomisation pattern - with that of the lower atomising air to fuel ratio having a more sharply defined central peak. Increasing the atomising air to fuel ratio reduces the droplet size distribution, producing a spray with a greater uniformity in its radial variation. The sprays, however, subtend approximately the same angle. The atomisation tests were followed by combustion measurements in a large-scale laboratory cylindrical furnace for both sprays. Measurements of mean gas temperature, species concentrations (O2, CO2, CO and unburnt hydrocarbon) and incident wall radiation flux are reported. The two flames exhibit distinct vaporisation rate histories which may be attributed to differences in droplet size and spray momentum. The data presented are intended to provide a better understanding of the relationship between spray quality and combustion performance and to assist the validation of mathematical models for prediction of HFO combustion.

Authors in the community:

• 

  M

  Mário Manuel Gonçalves da Costa

  ist13384

  Affiliations and sources

  IST > LAETA

  Laboratório Associado de Energia, Transportes e Aeronáutica

  IST > IDMEC

  Instituto de Engenharia Mecânica

  IST > DEM

  Departamento de Engenharia Mecânica

Combustion Science and Technology

129

154

75

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mechanical-engineering - Mechanical engineering

eng - English