Fuel Consumption due to Shaft Power Off-Takes from the Engine

Scholz, Dieter; Seresinhe, Ravinka; Staack, Ingo; Lawson, Craig

Publisher URL:	http://www.fzt.haw-hamburg.de/pers/Scholz/Off-Takes/Off-Takes_PUB_AST-CD-Version_13-04-23.pdf http://www.shaker.de/shop/978-3-8440-1850-9
Title:	Fuel Consumption due to Shaft Power Off-Takes from the Engine
Language:	English
Authors:	Scholz, Dieter Seresinhe, Ravinka Staack, Ingo Lawson, Craig
Editor:	von Estorff, Otto
Keywords:	Airframe Systems and Equipment; Information and Communication Management; Materials and Production; Cabin and Comfort
Issue Date:	2013
Publisher:	Aachen ; Shaker Verlag
Book title:	Proceedings of the 4th International Workshop on Aircraft System Technologies
Part of Series:	Berichte aus der Luft- und Raumfahrttechnik
Startpage:	169
Endpage:	179
Conference:	International Workshop on Aircraft System Technologies 2013
Abstract:	This paper looks at fuel consumption due to shaft power off-takes from the engine and the related increase in the aircraft’s fuel consumption. It presents a review and comparison of published and unpublished data on this kind of consumption. Insight is given into the effects caused by off-takes, looking at phenomena inside the engine when shaft power is extracted. The paper presents results from the TURBOMATCH engine simulation model, calibrated to real world engine data. Generic equations are derived for the calculation of fuel consumption due to shaft power extraction and values are presented for different flight altitudes and Mach numbers. Main result is the shaft power factor kP found to be in the order of 0.002 N/W for a typical cruise flight. This yields an amazingly high efficiency for power generation by shaft power extraction from a turbo fan engine of more than 70 %.
URI:	http://hdl.handle.net/20.500.12738/1387
ISBN:	978-3-8440-1850-9
Institute:	Department Fahrzeugtechnik und Flugzeugbau Fakultät Technik und Informatik
Type:	Chapter/Article (Proceedings)
Appears in Collections:	Publications without full text