After text activity. Exercise 1.Read and memorize using a dictionary: piston; crankshaft; turbine; thrust; nozzle; reciprocating engine; dead centre; recessed; cylinder head;

I. Reading Exercises:

Exercise 1. Read and memorize using a dictionary:

piston; crankshaft; turbine; thrust; nozzle; reciprocating engine; dead centre; recessed; cylinder head; single intake valve; single exhaust valve;dished piston; side-valve engines; overhead valve engines; elongated chamber; intake valve/port; pronounced "swirl"; turbulence; overall pattern; spark plug; flame front; crevice; detonate; residual gases; firing stroke; direct injection; indirect injection; ramjets and scramjets; combustor; fuel injector, liner, interconnectors, casing; Cannular type; common air casing; Annular type; annulus; firebox; prone to; sagging;  

Exercise 2. Answer the questions:

1) What is a combustion chamber?

2) How is the combustion chamber in gas turbines and jet engines called?

3) How do diesel engines fall into?

Exercise 3. Match the left part with the right:

1. The term combustion chamber is also used to refer to	a) a combustion chamber in the boiler.
2. Large steam locomotives usually have	b) in which combustion happens at a very small volume.
3. Micro combustion chambers are the devices	c) a far greater volume than the original fuel.
4. The hot gases produced by the combustion occupy	d) an additional space between the fireboxand boiler in a steam locomotive.

Exercise 4. Open brackets choosing the write words:

A reciprocating engine is often (designed/devised) so that the moving pistons are flush with the (top / head)of the cylinder block at top dead centre. The combustion chamber is (recessed/ suspended) in the cylinder head and commonly contains a (single / sole) intake valve and a single exhaust valve.

II. Speaking Exercises:

Exercise 1. Learn the definitions: combustion chamber, engine, turbine, piping, condenser;

combustion chamber-an enclosed space in which combustion takes place, such as the space above the piston in the cylinder head of an internal-combustion engine or the chambers in a gas turbine or rocket engine in which fuel and oxidant burn    

Engine -any machine designed to convert energy, esp heat energy, into mechanical work a steam engine a petrol engine.  

Turbine-any of various types of machine in which the kinetic energy of a moving fluid is converted into mechanical energy by causing a bladed rotor to rotate. The moving fluid may be water, steam, air, or combustion products of a fuel.  

Piping -a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Condenser- an apparatus for condensing, esp. for reducing gases or vapors to liquid or solid form.

Exercise 2. Ask questions to the given answers:

1) Question: ______________________________________________?

Answer: A combustion chamber is the part of an engine in which fuel is burned.

2) Question: ______________________________________________? Answer: The combustion chamber in gas turbines and jet engines (including ramjets and scramjets) is called the combustor.

3) Question: ______________________________________________

Answer: Diesel engines fall into two broad classes:

III. Writing exercises:

Exercise 1. Complete the sentences with the suggested words: fed; fuel; pressure; exhaust.

The combustor is 1 high pressure air by the compression system, adds 2 and burns the mix and feeds the hot, high 3 exhaust into the turbine components of the engine or out the 4 nozzle.

Exercise 2. Compose a story on one of the topics (up to 100 words):

“A combustion chamber

“Gas turbine”

“Steam engine”

Дата добавления: 2015-08-03