What is an inverse jet diffusion flame?
A special kind of non-premixed flame established when high velocity central air jet surrounded by low velocity annular fuel jet is ignited.
Advantageous properties of IDF:
- Low soot volume fraction.
- Better mixing at higher air–fuel momentum ratio due to the port arrangement.
Comparison between NDF and IDF
Applications
- Produces less soot and can find application in gas turbine combustors and rockets etc. where radiation heat transfer needs to be minimized.
- The port arrangement in IDF configuration can aid in better air-fuel mixing as high momentum central air jet can entrain and mix the low momentum annular fuel jet effectively.
- IDF can be used as a benchmark flame for studying initial mechanism of soot formation as it forms incipient or young soot in the exhaust.
