Accession Number:

ADA285461

Title:

Analysis of Infrared Scaling Laws

Descriptive Note:

Final rept.

Corporate Author:

NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD

Personal Author(s):

Report Date:

1994-03-01

Pagination or Media Count:

46.0

Abstract:

The scaling laws appropriate to the IR radiation from ships are displayed. The heat equation is rendered in dimensionless form so that its solutions manifestly apply to ships of arbitrary scale. The important variables for IR thermodynamic similarity are shown, viz. the dimensionless quantities, also called pi variables, associated with temperature, position, time, power per unit volume, and heat transfer coefficient. The purpose of scale modeling is to duplicate the ship values of these dimensionless quantities in the scale models studied. In so doing, the IR signals are duplicated as well and may be studied in a laboratory setting with all the advantages of repetition and control thus implied. Questions of compatibility of dimensionless variables are discussed. It is concluded that no apparent inherent incompatibilities among the dimensionless quantities relevant to the IR present themselves. Infrared scaling laws, Dimensionless variables, Accuracy of IR scaling, Scale model testing.

Subject Categories:

  • Optics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE