A Ram Air Driven Air Cycle Cooling System for Avionics Pods 860912
An avionics cooling system is described which uses direct ram air cooling at low air-craft speeds and ram air driven air cycle cooling at high aircraft speeds. The air cycle cooler operates on a reverse bootstrap cycle which has numerous advantages over closed cycle refrigeration systems. It requires no electrical power during flight since all of the power is supplied by captured ram air. A small amount of electrical power is required for ground cooling. The paper includes a description of the cooling system, the component hardware, analytical predictions and experimental measurements of air cycle cooling performance. Data are provided for internal pressures, flow rates, turbine discharge temperatures and cooling capacity. The results indicate that the system cooling capacity varies from 500 W to 1600 W at sea level and from 300 W to 400 W at an altitude of 50,000 ft. The effects of flow leakage and system pressure drop are found to be acceptable for avionics pod applications.
Citation: Grabow, R., Kreter, T., and Limberg, G., "A Ram Air Driven Air Cycle Cooling System for Avionics Pods," SAE Technical Paper 860912, 1986, https://doi.org/10.4271/860912. Download Citation
Author(s):
Richard M. Grabow, Todd W. Kreter, Gil E. Limberg
Affiliated:
Ford Aerospace and Communications Corp. Newport Beach, CA, AiResearch Manufacturing Co. Torrance, CA
Pages: 8
Event:
Intersociety Conference on Environmental Systems
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Aerospace Environmental Systems-Proceedings of the Sixteenth Ices Conference-P-177
Related Topics:
Electric power
Avionics
Aircraft
Hardware
Pressure
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