Theory of Aircraft Engines

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Code Completion Credits Range Language
2221176 Z,ZK 3 2P+1C Czech
Garant předmětu:
Department of Aerospace Engineering

Forms of energy and their transformation. Thermal engine, thermal cycles, thermal efficiency. Thermal and construction schemes of piston and turbine engines, characteristics of their thermal cycles. Alculation of real thermal cycles of reciprocating and turbojet engines. Optimization of design parameters of thermal cycles. Thermo-physical properties of air and combustion products. Combustion of hydrocarbon fuels, combustion chambers and their characteristics, harmful pollutants producing. Flow machines, their operation principles and their classification. Compressor and its operation characteristics. Turbine and its operation characteristics. Inlets and through-flow characteristics. By-pass engines, and turbofan engines. Throttle, speed and altitude performance characteristics of piston and turbojet engines. Noise generation and modes of its reduction. Of design turbojet engine operation, role of automatic engine control. Turbojet engine starting.


Aircraft Propulsion, Mechanics I A, Mechanics II A, Mechanics III A, Thermodynamics A, Fluid Dynamics A

Syllabus of lectures:

1) Forms of energy and their transformations, Thermal engine, Thermal cycles, Thermal efficiency

2) Calculations of real thermal cycles of piston and turbine engines

3) Basic construction configurations of piston and turbine aero engines and properties of their thermal cycles

4) Thermo-physical properties of air and combustion products

5) Combustion of hydrocarbon fuels, combustion chambers and their performance characteristics, production of pollutants

6) Turbomachinery, compressors and turbines, construction schemes, axial flow and centrifugal compressors, performance characteristics

7) Turbine, performance characteristics

8) Inlets and nozzles and their performance characteristics

9) By pass engines, turboshaft engines

10) Operational performance characteristics of piston and turbine aero engines

11) Engine noise and noise suppression

12) Turbine engine operating regimes, acceleration and deceleration

13) Automatic engine control and starting

Syllabus of tutorials:

1) Parametric cycle analysis of ideal gases

2) Parametric cycle analysis of real engines

3) Engine performance analysis

4) Calculation of hot air and combustion products enthalpy

5) Chemical reactions of fuel combustion and calculations of air-fuel theoretical mixing ratio

6) Calculations of the flow within an elementary axial flow compressor stage

7) Calculations of the flow within an elementary axial flow turbine stage

8) Calculations of the flow within diffusers and nozzles

9) Calculation of performance parameters of a by-pass engine and a turboshaft engine

10) Calculation of the air flow within a jet engine as a function of a velocity of flight

11) Calculation of an engine working curve within a compressor performance characteristic

12) Creation of a mathematical and physical model of a turboprop engines

13) The calculations of specific fuel consumption turbine engine

Study Objective:

Explain processes of energy transformation in aircraft piston and turbine engines and describe in detail a course of thermodynamic state of working gases and fuels during their through-flow in both piston and turbojet engines. Understand a function of flow engines, particularly axial-flow and centrifugal flow compressor and axial-flow turbine and this both from the point of view of internal aero-thermodynamics and also from the point of view of operational characteristics. Understand function of combustion chamber, formation of the air-fuel mixture, combustion and its operational characteristics. Get up design thermal and construction schemes of turbojet engines, their thermal cycles for given design flight operation mode, realize a layout of the air and combustion products passage of the turbojet engine on the main flow streamline and calculate its operational characteristics. Understand the coactions of all of the jet engine construction modules and get oriented in its operation characteristics. Understand operation of the turbojet engine in off design flight regimes and understand the function of automatic control of the turbojet engine.

Study materials:

?Mattingly J.D.: Elements of Gas Turbine Propulsion, McGraw-Hill, Inc., 1996

?Hűnecke K.: Jet Engines, Fundamentals of Theory, Design and Operation, Airlife Publishing Ltd, 2000

?Bathie W., W.: Fundamentals of Gas Turbines, John Wiley and sons, INC., 1984

Further information:
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