15.3 compressor inlet ducts Flashcards
(13 cards)
what is used to straighten airflow into inlet of the compressor
inlet guide vanes (igv)
is the air inlet duct considered a part of the engine
no
it is considered an airframe part
as aircraft speed increase, does thrust increase or decrease?
decrease
what is ram recovery
compensates for the losses caused by increase in speed -
added pressure at inlet of engine increases the pressure and airflow to engine
what speed should the airflow into the engine be below
mach 1
cons of inlet screen
loss of inlet pressure
susceptible to icing
cause more than no screen if it has failed
when are inlet screens not used
on turbofan engines with steel or titanium compressor blades
when is a bellmouth inlet used
on an engine undergoing testing in test cell
how do turboprops provide anti icing on inlet
warm oil from engine oil resevoir is used to provide anti icing with additional hot air
what temp can ice form in the inlet (dry and moist air)
5c in dry air
7c in moist air
when are electrical heat strips used
when the engine cowls require anti-icing
what engines use bleed air for anti icing
high mass airflow engines
