A Preliminary Design and Analysis of an Advanced Heat-Rejection System for an Extreme Altitude Advanced Variable Cycle Diesel Engine Installed in a High-Altitude Advanced Research Platform

Johnston, Richard P. (1992) A Preliminary Design and Analysis of an Advanced Heat-Rejection System for an Extreme Altitude Advanced Variable Cycle Diesel Engine Installed in a High-Altitude Advanced Research Platform. Technical Report NASA CR-186021, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

Satellite surveillance in such areas as the Antarctic indicates that from time to time concentration of ozone grows and shrinks. An effort to obtain useful atmospheric data for determining the causes of ozone depletion would require a flight vehicle capable of reaching altitudes of at least 100,000 ft and flying subsonically during the sampling portion of the mission. A study of a heat rejection system for an advanced variable cycle diesel (AVCD) engine was conducted. The engine was installed in an extreme altitude, high altitude advanced research platform. Results indicate that the waste heat from an AVCD engine propulsion system can be rejected at the maximum cruise altitude of 120,000 ft. Fifteen performance points, reflecting the behavior of the engine as the vehicle proceeded through the mission, were used to characterize the heat exchanger operation. That portion of the study is described in an appendix titled, "A Detailed Study of the Heat Rejection System for an Extreme Altitude Atmospheric Sampling Aircraft," by a consultant, Mr. James Bourne, Lytron, Incorporated.

EPrint Type:	NASA Contractor Report
Keywords:	Extreme altitude remotely piloted vehicle, High-altitude atmospheric sampling, Hybrid heat exchanger, Unmanned air vehicle, Variable cycle diesel
Subjects:	(01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: Miscellaneous
ID Code:	1076
Deposited On:	01 September 2006
Additional Information:	55 pages. A report titled "A Detailed Study of the Heat-Rejection System for an Extreme Altitude Atmospheric Sampling Aircraft," by Mr. James Bourne, Lytron, Incorporated, is included as an appendix to this document.