Systems of commercial turbofan engines: an introduction to - download pdf or read online

By Andreas Linke-Diesinger

ISBN-10: 3540736182

ISBN-13: 9783540736189

For the certainty of the operation of gasoline turbine engines utilized in airplane, it isn't sufficient to appreciate the elemental operation of a fuel turbine. it's also essential to comprehend the operation and the layout of its structures. This booklet presents an advent to the platforms of recent advertisement turbofan engines. it's made for the reader who's conversant in the fundamentals of airplane fuel turbine engine operation and is getting ready him- or herself for the 1st engine kind education. This ebook additionally bargains a uncomplicated orientation during the a number of tubes, traces and method parts put in on a posh turbofan engine.

Within this publication you can find details at the operation of engine structures, the services in their parts and the terminology used in the course of the undefined. The engine platforms are defined utilizing examples chosen from today’s engines. consequently, you can be made acquainted with the present expertise during this box. The examples comprise a variety of engines from diverse brands. whether you haven't any engineering heritage, this publication provides you with understandable details and may assist you to obtain a deeper wisdom of the working rules at paintings within the platforms of industrial turbofan engines. it truly is precious for the airplane mechanic, the engineering scholar and for the coed pilot.

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Additional info for Systems of commercial turbofan engines: an introduction to systems functions

Example text

For the efficient storage of data in the databases of the fuel control system the characteristic diagrams are stored for the ISA conditions only. The data are converted to the actual atmospheric conditions by the respective calculations established in the software. 5 Location Designations on Cases For the description of a position on an engine or an aircraft basically a view from the aft into flight direction is assumed. Directions like “left of centerline” or “right of centerline” are based on this viewing direction.

3, no CDP seal is installed. Here the air pressure from the exit of the last HPC rotor is present at the front face of the HPT disk. A bearing compartment in the inner cavity of the combustion case needs cooling to keep the temperature of the compartment walls low for the prevention of oil coking. 4 shows the supply of cooling air to this compartment. The air is delivered through an external system via an air cooler. After this air has passed the cooling air passages around the bearing compartment it exits into the internal airflow of the combustion case.

1 Components of an Active Clearance Control System The cooling air is extracted from the fan duct or from the appropriate stage of the HPC. In the air duct, which guides the cooling air towards the turbine case area, an airflow control valve is installed. This turbine clearance control valve is used to control the amount of air flowing to the turbine case. Because of the different cooling demands of the HPT and the LPT one valve for each turbine is needed (and one for the HPC if HPC ACC is installed).

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