Accession Number:

AD0912130

Title:

Clear Aperture Anti-Frost Technology.

Descriptive Note:

Final technical rept.

Corporate Author:

AVCO EVERETT RESEARCH LAB INC EVERETT MA

Personal Author(s):

Report Date:

1973-02-01

Pagination or Media Count:

291.0

Abstract:

A theoretical and experimental study of a class of Clear Aperture Anti-Frost CAAF devices is described. Generalized scaling laws for CAAF operation are derived and verified in laboratory experiments. The design, instrumentation and testing of a 10-inch aperture axial flow CAAF is described, and laboratory operation is demonstrated. It is shown that injection of a warm gas primary flow is permissable, and that a secondary, swirling flow is required for internal flow stabilization. Wind tunnel simulation experiments are summarized and transmission data is presented for simulated open canopy operation. Successful CAAF operation for more than four hours is demonstrated for a 500 poundhour flowrate. Transmission degradation at lower flowrates is shown to be due to canopy velocity fluctuations. Author

Subject Categories:

  • Infrared Detection and Detectors
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE