M15c6

20問 • 9ヶ月前

ユーザ名非公開

通報

問題一覧

Turbine section converting gas stream kinetic energy

into mechanical energy to drive compressor

Turbine Blades Material

Nickel alloy.

Impulse type Turbine Blades used in

starter blades

Impulse-reaction type used in

all modern jet engines

Turbine blade secured to the disc using

fir tree root with locking plate

Cooling air enters the fir-tree turbine blades though the

base of the root

Fir-Tree turbine blades attachment

allows slight movement

The space between two nozzle guide vanes forms

a convergent duct in order to increase velocity

the cooling air flows through the hollow nozzle vanes and rotor blades this method

is known as Convection cooling

Blade Twist

To ensure equal work done all over the blade length (root to tip)

Nozzle Guide Vanes Function

direct gases in proper angle to first stage turbine nozzle.

Nozzle Guide Vanes

Cooling by ceramic coating and bleed air

Creep is permanent elongation in rotor blades,

resulting of thermal stress and high centrifugal force

Most creep resistant blades are

single structure blades

ACC cools turbine casing to

reduce tip losses and improve efficiency in the cruise.

Shrouded turbine rotor blades used

to reduce vibration and improve air flow.

The efficiency of a turbine blade increases proportional,

as its rotational speed increases

The nozzle guide vanes and at the rotor blades are cooled by the method of

film cooling

Running clearance on a turbine disk is kept to a minimum to

reduce tip losses

advantage of an axial turbine is that it

allows very high airflow which is needed to create the high thrust of modern engines

mod5 training

mod5 training

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問題一覧

Turbine section converting gas stream kinetic energy

into mechanical energy to drive compressor

Turbine Blades Material

Nickel alloy.

Impulse type Turbine Blades used in

starter blades

Impulse-reaction type used in

all modern jet engines

Turbine blade secured to the disc using

fir tree root with locking plate

Cooling air enters the fir-tree turbine blades though the

base of the root

Fir-Tree turbine blades attachment

allows slight movement

The space between two nozzle guide vanes forms

a convergent duct in order to increase velocity

the cooling air flows through the hollow nozzle vanes and rotor blades this method

is known as Convection cooling

Blade Twist

To ensure equal work done all over the blade length (root to tip)

Nozzle Guide Vanes Function

direct gases in proper angle to first stage turbine nozzle.

Nozzle Guide Vanes

Cooling by ceramic coating and bleed air

Creep is permanent elongation in rotor blades,

resulting of thermal stress and high centrifugal force

Most creep resistant blades are

single structure blades

ACC cools turbine casing to

reduce tip losses and improve efficiency in the cruise.

Shrouded turbine rotor blades used

to reduce vibration and improve air flow.

The efficiency of a turbine blade increases proportional,

as its rotational speed increases

The nozzle guide vanes and at the rotor blades are cooled by the method of

film cooling

Running clearance on a turbine disk is kept to a minimum to

reduce tip losses

advantage of an axial turbine is that it

allows very high airflow which is needed to create the high thrust of modern engines