Accession Number:

AD0819193

Title:

INVESTIGATION OF A MOVING BELT RADIATOR.

Descriptive Note:

Final rept. 1 May 65-1 May 67,

Corporate Author:

ROCKETDYNE CANOGA PARK CA

Report Date:

1967-08-01

Pagination or Media Count:

313.0

Abstract:

This report covers the 24-month period of a continued research program on the feasibility of the moving belt radiator, a novel concept for the rejection of waste heat in space. The main concerns of the program are materials compatibility, thermal conduction between surfaces, antifriction bearing operation at high temperature in a high vacuum, and the dynamic behavior of the belt system under simulated in-flight conditions. These areas were investigated in four phases of the program. Phase 1, Long-Duration Thermal and Flexural Tests, showed that higher contact conductances 6000 Btuhr-sq ft-F than required for a belt radiator system can be obtained with a molybdenum belt, molybdenum drum, and liquid tin interface. A 1,000,000 contact-cycle test demonstrated the durability and compatibility of this combination of materials. Phase 2, Small-Scale Model Moving Belt Experiments were used to measure contact conductances up to 2240 Btuhr-sq ft-F of the molybdenum-tin-molybdenum combination. A 100-hour endurance test was performed and showed that there was no deterioration of the heat transfer. Phase 3, Bearing Tests have shown the feasibility of dry-film lubricated bearings at 800 F in a high vacuum. An increased curvature and diametral clearance gave the most satisfactory results with submicron-size particle MoS2 powder or a MoS2 C compound as lubricant. Phase 4, Dynamic Simulation of In-Flight Operation was studied with the aid of scaled models. A 120-scale model was used to investigate engineering problems of a belt system. Author

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Machinery and Tools
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE