УДК 42
ББК СГАУ: Ш143.21.923
ISBN 978-5-7883-0809-8
2
© Самарский государственный
аэрокосмический университет, 2010
Unit I
COMPRESSORS
Before you Begin
I. Have you ever met the term “Compressor” in technical
literature? <...> Brainstorm all possible terms related to the topic.
compressors
Reading
I. In the text, find definitions of :
a) -compressor efficiency
-axial flow compressor
-centrifugal flow compressor
-centrifugal-axial-flow compressor
-stage
-rotor blades
-stator vanes
3
b) try to define the meaning of the term “compression ratio” as
you understand it. <...> Compressors
The role of the compressor in a gas
turbine engine is to provide a maximum
of high-pressure air which can be heated
in the limited volume of the combustion
chamber and then expanded through the
turbine. <...> The energy that can be released
in the combustion chamber is proportional to the mass of air consumed; therefore the compressor is one of the most important components of the gas turbine engine since its efficient operation (maximum compression with minimum temperature rise) is the key to high
overall engine performance. <...> The compressor efficiency will determine
the power necessary to create the pressure rise of a given airflow and
will affect the temperature change which can take place in the combustion chamber. <...> Types of Compressors
All gas turbine engines use one of the following forms of compressors:
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1. <...> The Axial-Flow Compressors
The axial-flow compressor is made up of a series of rotating airfoils called rotor blades and a stationary set of airfoils called stator
vanes. <...> As its name implies, the air is being compressed in a direction
parallel to the axis of the engine. <...> The entire compressor is made up of a series
of alternating rotor and stator vane stages. <...> Some axial-flow designs
have two or more compressors or spools which are driven by separate
turbines and are therefore free to rotate at different speeds. <...> Furthermore, the number of compressor blades and stator vanes (which can
exceed 1000 in a large jet engine), the close fits required for efficient
air pumping, and the much narrower range of possible operating
conditions, make this type of compressor very complex and very expensive to manufacture. <...> Modern manufacturing techniques are
bringing <...>
Развитие_профессиональных_компетенций_студентов_технических_вузов_(английский_язык).pdf
МИНИСТЕРСТВО ОБРАЗОВАНИЯ И НАУКИ РФ
ГОСУДАРСТВЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ
ВЫСШЕГО ПРОФЕССИОНАЛЬНОГО ОБРАЗОВАНИЯ
«САМАРСКИЙ ГОСУДАРСТВЕННЫЙ АЭРОКОСМИЧЕСКИЙ
УНИВЕРСИТЕТ имени академика С.П. КОРОЛЁВА
(НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ)»
С.А. Авдейко, Г.В. Любаева
РАЗВИТИЕ ПРОФЕССИОНАЛЬНЫХ КОМПЕТЕНЦИЙ
СТУДЕНТОВ ТЕХНИЧЕСКИХ ВУЗОВ
(АНГЛИЙСКИЙ ЯЗЫК)
Утверждено Редакционно-издательским советом университета
в качестве учебного пособия
САМАРА
Издательство СГАУ
2010
Стр.1