NDLI: Thermal management of military fighter aircraft electro-optics pod: an invited paper

Content Provider	IEEE Xplore Digital Library
Author	Price, D.C.
Copyright Year	2003
Description	Author affiliation: Raytheon Network Centric Syst., McKinney, TX, USA (Price, D.C.)
Abstract	The thermal management of electro-optics equipment mounted in a pod residing under the fuselage of a fighter aircraft represents a formidable challenge. As an add-on to the aircraft, no air- or liquid-coolant can be provided to the pod, and there is a limit to the electrical power that can be provided for cooling purposes. The operating envelope of this electronics pod is from sea level to 13.7 km (45 kft) altitude at Mach numbers from 0.3 to 0.9. The maximum allowable cooling air temperature for equipment in the forward avionics bay was 55/spl deg/C at sea level and 26/spl deg/C at 13.7 km (45 kft). The inlet air temperatures for the electro-optics sensor bay ranged from 4/spl deg/C to 32/spl deg/C with the maximum allowable inlet air temperature set at 40/spl deg/C. The sensor temperature was required to be controlled within +/- 0.14/spl deg/C. The liquid coolant used in the system was the dielectric oil, polyalphaolefin (PAO), and the maximum allowable liquid temperature was 70/spl deg/C. The maximum aerodynamic heating load for the pod was in excess of 2000 W for high speed flight at sea level and the total heat load for the pod, including the aerodynamic heating loads, ranged from 4000 W to 5400 W, depending on the operating mode of the electro-optics equipment. The thermal management solution described in this paper is a complex one which includes the design of a ram air inlet, an environmental control system (ECS) including an expansion turbine with a compressor on a common shaft, three liquid-to-air heat exchangers, two air-to-air heat exchangers, two liquid pumps with accumulators, two fans, one air-cooling loop, two liquid-cooling loops, five air-cooled electronic chassis, and six liquid-cooled electronic chassis.
Starting Page	341
Ending Page	350
File Size	833693
Page Count	10
File Format	PDF
ISBN	0780377931
ISSN	10652221
DOI	10.1109/STHERM.2003.1194383
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal management Military aircraft Temperature sensors Ocean temperature Aerospace electronics Sea level Electronics cooling Temperature distribution Temperature control Aerodynamics
Content Type	Text
Resource Type	Article

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