Chapter 3 Turbine Engine

Increases, decreases, decreases, increases

A convergent duct________________ velocity and _______________ pressure and temperature, while a divergent duct________________ velocity but _____________ pressure and temperature.

Inlet, compressor, combustion, turbine, exhaust

A gas turbine propulsion engine will always have a/an ___________,____________section, ______________section,_____________ section and a/an ____________ nozzle

Turbo shaft

A gas turbine that delivers power through a shaft to operate something other than a propeller is referred to as a ______________engine .

Thrust

A propulsion system is a machine that produces ________________ to push an object forward.

Rotating mechanical

A turbine engine is a mechanical device that transforms heat energy into a ____________ force

Fan

A turbofan gets some of its thrust from the core, but most of its thrust from the _______________.

Less than the rest of the stream

According to Bernoulli's principle, if the velocity of a stream of fluid is increased at a given point, the pressure of the stream that point is _______________.

Subsonic

Although an aircraft equipped with turbofan engines can fly at speeds faster than the speed of sound, the airplane inlet controls airflow into the engines which must be at _____________speeds.

Decrease

As altitude increases, the thrust of a turbine engine tends to__________________.

equal and opposite reaction

Basic propulsion principle are based on Newton's third law of physics which states that for every action,___________________.

Increased

Bernoulli's principle states that wherever a stream of any fluid has its velocity _______________ at a given point, the pressure of the steam at that point is less than the rest of the stream.

Turbojet, turboprop, turboshaft, turbofan

In a gas turbine propulsion engine, forward thrust can be achieved primarily through the utilization of energy created by the following four types of gas turbine arrangements:____________________________,______________________,______________________, and _______________

Intermittently fired

In a pulsejet propulsion engine, a/an ___________ duct is utilized

High pressure

In a ramjet engine, ramming external air into the combustor and using the forward speed of the vehicle produces ___________________.

Higher

In a ramjet engine, to maintain fuel flow through nozzle, the combustion must occur at a pressure that is ________ than the pressure at the nozzle exit.

Compressor

In a turbojet engine, high pressure in the combustor is generated by the ________________.

Convergent, divergent

In reference to airflow principles, _______________ and _____________ ducts provide the means to change the velocity and pressure as it moves through an engine.

Compressor, shaft , turbine

In the answer to question 11, a spool consists of a __________,______________ and ___________.

Centrifugal Compressor

In the early 1920s, development of a workable exhaust driven turbocharge for the piston engine enable exhaust gases to drive a ________________

Divergent

The _______ duct decreases velocity and increases pressure

Turbofan

The _____________ engine is the most modern variation of the basic gas turbine engine.

Convergent

The ______________ duct increases velocity and decreases pressure.

Newtons

The formula F=M x A expresses _______ second law

Reduce

The gearbox in a turboprop engine ________ the power turbine drive shaft's speed because of the high speeds used in the engine

Pressure

The general principle of the fan engine is to convert fuel energy into ______________.

Thermal efficiency

The ratio of total work produced by a gas turbine engine to the amount of chemical energy (i.e, fuel) required is known as _______________

Turbine inlet temp, compression ratio, component efficiencies

The three most important factors affecting the thermal efficiency of a gas turbine engine are: ___________________,____________________, and the ____________________ of the compressor and turbine

Gas generator, speed reduction

There are two main parts of a turboprop propulsion system: the __________and the ____________ and propeller .

32.2 ft per sec

To calculate the acceleration of a given mass, the gravitational constant is used as a units of comparison. The force of gravity is ___________.

Fan jet

Turbofans, sometime called______________, are the most widely used gas turbine engines.

Bypass ratio

With a turbofan engine, the ratio of the airflow (lbs/sec) going around the engine to the air going through the core is called the ____________________.