New PDF release: Aircraft Propulsion Systems Technology and Design (Aiaa

By Gordon C. Oates

A finished insurance of the most important actual strategies that govern gasoline turbine propulsion structures. subject matters comprise combustion know-how, engine/airplane functionality matching, inlets and inlet/engine integration, variable convergent/divergent nozzle aerodynamics, and extra.

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Extra resources for Aircraft Propulsion Systems Technology and Design (Aiaa Education Series)

Sample text

5) Severely separated flow produces high drag or losses as a result of mixing. Finally, we should appreciate that when a separation point has become more or less stabilized, the local adverse pressure gradient includes the effect of a not inconsiderable separation eddy immediately downstream. There is indirect evidence, from slotted diffusers and slotted compressor casings, that greater pressure recovery could result from evading the added DESIGN AND DEVELOPMENT Time sequence is a, c, Fig. 35 59 b, d.

A word about variable jet nozzles is in order at this point. Opening the nozzle increases the turbine pressure ratio when the ETR is fixed. 0 pressure ratio curve in Fig. 19 indicates the trend of the new match point. The higher speed causes the compressor to develop a higher pressure ratio with a higher weight flow. 0 curve in Fig. 19. These adjustments, of course, affect the thrust, which can be estimated. Variable nozzles are essential in engines with afterburning. Single-Shaft Turboprop Simplified analysis.

Engines often provide additional power in the form of compressed air, which is bled from the compressor. In this section, however, we shall ignore the small power requirements for accessories and other parasitic demands and deal only with those of the propellers and jets. Compressor and Turbine Characteristics This section presents some background information for the discussions that follow. Compressor maps. The characteristics of compressors are described by performance maps similar to Fig. 12.

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Aircraft Propulsion Systems Technology and Design (Aiaa Education Series) by Gordon C. Oates


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