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Experimental test of liquid droplet radiator performanceThe liquid droplet radiator (LDR) is a heat rejection system for space power systems wherein an array of heated liquid droplets radiates energy directly to space. The use of submillimeter droplets provides large radiating area-to-mass ratio, resulting in radiator systems which are several times lighter than conventional solid surface radiators. An experiment is described in which the power radiated by an array of 2300 streams of silicone oil droplets is measured to test a previously developed theory of the LDR radiation process. This system would be capable of rejecting several kW of heat in space. Furthermore, it would be suitable as a modular unit of an LDR designed for 100-kW power levels. The experiment provided confirmation of the theoretical dependence of droplet array emissivity on optical depth. It also demonstrated the ability to create an array of more than 1000 droplet streams having a divergence less than 1 degree.
Document ID
19880035457
Document Type
Conference Paper
Authors
Mattick, A. T. (Washington Univ. Seattle, WA, United States)
Simon, M. A. (Washington, University Seattle, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Meeting Information
Space nuclear power systems 1986(Albuquerque, MN)
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-83-0367
CONTRACT_GRANT: NAG1-327
Distribution Limits
Public
Copyright
Other