Module 6 Flashcards
What is the diffuser?
Divergent section between the compressor and the combustion chamber. It is the area highest static pressure and potential energy
What happens to the air in the diffuser?
Airflow velocity is reduced and Static Pressure is increased
How much of the energy during combustion was used to spin the turbines?
2/3
What helps to control the flame pattern?
Louvres and cooling holes
What joins the combustion gases through layer holes, diluting the hot gases with cooling air prior to entering the turbines
Cooling Air
How do we reduce air velocity for combustion?
Swirl using Pre-Swirl Vanes
What do we call a flameout at high altitudes with low engine speeds and low fuel pressure and a weak flame?
Lean Die-out
What do we call a flameout due to rapid acceleration with an overly rich mixture and insufficient airflow?
Rich Blowout
This type of combustion chamber is commonly used with centrifugal compressors
Single-Burner Combustor
This kind of combustor works well with centrifugal compressors, cans are interconnected with flame propagation tubes
Multi-Can Combustors
This type of combustion chamber consists of an outer liner and inner liner (Basket)
Annular Combustor
This kind of annular combustor is where air enters the front and is discharged at the rear
Straight Flow
This kind of annular combustor is where airflow reverses direction 180 degrees twice. (Helicopters and Turboprop aircraft)
Reverse Flow
This kind of combustor is a combination of multiple can and annular combustor
Can-Annular Combustor
What is a modern solution to combustors to resist flameout?
Precombustor Chamber
