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core 1 > 1.5 > Flashcards

1.5 Flashcards

1
Q

Front Frame Location

A

Front of compressor section

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2
Q

Front Frame Description

A

Welded steel ring that houses inlet guide vanes

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3
Q

Inlet Guide vanes

A

hollow to allow for hot air from engine to circulate through the vanes to prevent ice from forming
also provides lubrications oil to and from main bearing

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4
Q

Air Inlet Duct

A

Preswirls front frame in direction of rotation of engine compressor rotor to prevent shock

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5
Q

Compressor section Location

A

Between front frame and combustion section

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6
Q

Compressor consist of

A

Casing, rotor assembly, stator assembly, exit guide vane assembly, and diffuser

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7
Q

Compressor Section main purpose

A

supplies air in sufficient quanitities to satisfy the requirements of the combustion section

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8
Q

Compressor section purpose,cont.

A 
Heating/as
cabin pressurization
cooling of engine cavities
pressurization of fuel cells and transfer of fuelk
anti-icing
oil seal pressurization
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9
Q

Compressor section os of the axial flow type

A

Compressor section os of the axial flow type

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10
Q

axial flow compressor

A

compresses air in direction that is parallel to axis of engine

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11
Q

axial flow compressor consists

A

alternating series of rotating airfoils(blads) and stationary airfoils(stator vanes)

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12
Q

axial flow compressor casing

A

houses the stator assemblies

provides mountaing pads for accessories and bleed air ports.

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13
Q

axial flow compressor rotor assembly consist of

A

Shaft, disks, blades
blades are attached to compressor disk by dove tail, bulb, or fir tree root. locked in place by peening pins locking wires or keys

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14
Q

axial flow compressor rotor assembly blades are made of

A

stainless steel, aluminum, or titanium

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15
Q

axial flow compressor stator assembly consist of

A

stationary vanes dove-tailed into split0rings and mounted to compressor casing.

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16
Q

axial flow compressor stator assembly banes are made from

A

aluminum titatnium or staineless steel

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17
Q

exit guide vanes location

A

at compressor exit

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18
Q

exit guide vanes are

A

stationary vanes that straighten air to eliminate turbulence

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19
Q

diffuser located

A

part of compressor section

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20
Q

diffuser forms

A

the compressor rear frame

21
Q

diffuser develops

A

a pressure wall to prevent reverse flow of combustion gases back into compressor

22
Q

high pressure point

A

diffuser

23
Q

types of axial flow compressor

A

single and dual

24
Q

advantage of axial flow compressor(compared to centrifugal cflow compressor)

A

high peak efficiencies

small frontal area

25
Q

disadvantage of axial flow compressor

A

heavy
difficult to manufacturer
high starting power requirements

26
Q

Combustion section location

A

between compressor and turbine

27
Q

Combustion section purpose

A

to burn the fuel/air mixture, adding heat energy to mass airflow

28
Q

combustion section components

A 
Casing
chambers
ignitor plugs
fuel nozzles
fuel drain
29
Q

Type of fuel nozzles

A

Duplex and simplex

30
Q

fuel drain

A

located at bottom of combustion casing. drains residual fuel

31
Q

Type of combustion chambers

A

Annular and can-annular

32
Q

Annular

A

limited area,1 chamber

33
Q

can-annular

A

mulitble chambers

34
Q

Turbine section locationg

A

between combustion and exhaust

35
Q

Turbine purpose

A

extract energy from expanding gases from combustion section and xonvert gases to shaft horsepower

36
Q

turbine energy determined by

A

compressor size, number of engine driven accessories, reduction gearboxes to drive propellars, rotary airfois driven by shafts

37
Q

Trubine section components

A

Casing
Nozzles assemblies
turbine rotar assembly

38
Q

Types of turbine blades

A

impulse - light
reaction - medium
impulse reaction - heavy

39
Q

Exhaust section location

A

Aft of turbine section

40
Q

Exhaust section purpose

A

collect exhaust gases and deliver them to exhaust nozzles
mounting for thermocouplings’
provide mounting for struts

41
Q

Exhaust section inner cone

A

prevents turbulence and allows gases to come together to form a solid jet stream

42
Q

Tailpipe

A

used to carry exhaust gases away from airframe(apart of aircraft not engine)

43
Q

exhaust nozzles purpose

A

impart final boost in velocity to gases leaving engine(provide thrust)

44
Q

thermocouples location

A

forward, aft or between turbine stages

45
Q

thermocouples purpose

A

monitor termp throughout system

46
Q

Insulation blankets

A

protect airframe from heat

47
Q

Power Take Off location

A

center front of compressor hub

48
Q

Power take off purpose

A

change compressor rotor speeds suitable drive speeds

core 1 (6 decks)

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