Nondestructive Evaluation of Moisture Intrusion in Missile Components.
Abstract
Field return data for the SPARROW III/AIM-7 missile have indicated that moisture intrusion into the target seeker has occurred. A program was initiated to determine the controlling parameters in the moisture intrusion problem and develop recommendations for modifications to the design of the seeker section. Testing was performed to determine parameters associated with target seeker geometry. Using the test results, a thermodynamic model of the system was developed which allowed for simulation of a variety of environmental conditions and geometry changes. The results indicated that the driving factors in the level of moisture intrusion were the rate of change of environmental temperature, the leakage path area, and significant differences between the thermal response of the electronics packaged and the outer shell. It was possible to match the results of the thermodynamic model with those of the experiments. Proposed modifications to the target seeker were made and results checked with the thermodynamic model. Areas requiring additional testing and analysis are discussed. Keywords: Air to air missiles; Leakage(Fluid); Guided missile components; Humidity testing; Thermodynamic model. (edc)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 25, 1987
- Accession Number
- ADA196269
Entities
People
- Daniel J. Pomerening
- Steven T. Green
Organizations
- Southwest Research Institute