Open AccessExperimental study of the flame propagation of gaseous fuel based mixture using optical visualisation
Author(s) -
Rosen Hristov,
Stefan Stefanov,
Radostin Dimitrov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1002/1/012023
Subject(s) - combustion , ignition system , combustion chamber , schlieren , schlieren photography , spark (programming language) , spark plug , materials science , flame speed , spark ignition engine , nuclear engineering , internal combustion engine , volume (thermodynamics) , automotive engineering , mechanical engineering , mechanics , premixed flame , computer science , engineering , chemistry , aerospace engineering , flow visualization , combustor , thermodynamics , physics , programming language , flow (mathematics) , organic chemistry
At this article presents experimental investigations carried out to determine the flame kernel propagation of gaseous fuel-air mixture under spark-ignition engine-like conditions. Various combustion processes taking place in an experimental combustion chamber are discussed. Consecutive shots of the development of the fuel flame front in a constant volume combustion chamber under different initial conditions are presented. Direct visual recording of an image of the combustion process is performed or Schlieren photography techniques are used. Modern types of spark plugs with different gaps in the entire price range are examined. CNG and LPG are used as gaseous fuels, since they are the main alternative fuels used in internal combustion engines for vehicles. Some of the results, such as pressure, maximum pressure and electric spark indicators, are shown as graphics. To calculate the speed of the flame propagation, specialised software processing the areas of the individual photos was used. The conclusions emphasize the results of relative air/fuel ratio, most favourable type of spark plugs and their gaps and location in the combustion chamber.