Abstract

A new experimental technique is developed to determine simultaneously the total hemispherical emittance, solar absorptance, and absorptance–emittance ratio for metals at cryogenic temperatures. The method compares the temperature response of thin metal samples to a sinusoidal perturbation of an imposed radiant intensity. Emittance data are presented for aluminum, copper, and 304 stainless steel over the temperature range 150–500 K. From the data, the applicability of the cyclic radiant intensity method is evaluated, and the problems associated with extending the method to temperatures below 150 K are discussed.

© 1968 Optical Society of America

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References

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  1. J. R. Jack, AIAA J. 5, 1603 (1967).
    [CrossRef]
  2. H. Mark, Proc. Inst. Environmental Sci. (1961), p. 521.
  3. F. E. Terman, Joseph M. Pettit, Electronic Measurements (McGraw-Hill Book Company, Inc., New York, 1952).
  4. G. G. Gubareff, J. E. Jansen, R. H. Torborg, “Thermal Radiation Properties—a Review of the Literature,” Honeywell Research Center (1960).
  5. Y. S. Touloukian, Thermophysical Properties of High Temperature Solid Materials (The Macmillan Company, New York, 1967).

1967 (1)

J. R. Jack, AIAA J. 5, 1603 (1967).
[CrossRef]

1961 (1)

H. Mark, Proc. Inst. Environmental Sci. (1961), p. 521.

Gubareff, G. G.

G. G. Gubareff, J. E. Jansen, R. H. Torborg, “Thermal Radiation Properties—a Review of the Literature,” Honeywell Research Center (1960).

Jack, J. R.

J. R. Jack, AIAA J. 5, 1603 (1967).
[CrossRef]

Jansen, J. E.

G. G. Gubareff, J. E. Jansen, R. H. Torborg, “Thermal Radiation Properties—a Review of the Literature,” Honeywell Research Center (1960).

Mark, H.

H. Mark, Proc. Inst. Environmental Sci. (1961), p. 521.

Pettit, Joseph M.

F. E. Terman, Joseph M. Pettit, Electronic Measurements (McGraw-Hill Book Company, Inc., New York, 1952).

Terman, F. E.

F. E. Terman, Joseph M. Pettit, Electronic Measurements (McGraw-Hill Book Company, Inc., New York, 1952).

Torborg, R. H.

G. G. Gubareff, J. E. Jansen, R. H. Torborg, “Thermal Radiation Properties—a Review of the Literature,” Honeywell Research Center (1960).

Touloukian, Y. S.

Y. S. Touloukian, Thermophysical Properties of High Temperature Solid Materials (The Macmillan Company, New York, 1967).

AIAA J. (1)

J. R. Jack, AIAA J. 5, 1603 (1967).
[CrossRef]

Proc. Inst. Environmental Sci. (1)

H. Mark, Proc. Inst. Environmental Sci. (1961), p. 521.

Other (3)

F. E. Terman, Joseph M. Pettit, Electronic Measurements (McGraw-Hill Book Company, Inc., New York, 1952).

G. G. Gubareff, J. E. Jansen, R. H. Torborg, “Thermal Radiation Properties—a Review of the Literature,” Honeywell Research Center (1960).

Y. S. Touloukian, Thermophysical Properties of High Temperature Solid Materials (The Macmillan Company, New York, 1967).

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Figures (3)

Fig. 1
Fig. 1

Schematic drawing of experimental setup.

Fig. 2
Fig. 2

XY recorder figure for SS304 at 10 rph.

Fig. 3
Fig. 3

Tangent of phase angle as function of cyclic frequency. All samples 25 μ thick.

Tables (1)

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Table I Metal Sample Data

Equations (9)

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γ c p b T ˙ = α E 0 ( 1 + k sin ω t ) + q - 2 σ T 4 .
T = T m + A [ sin ( ω t - φ ) + e - t / θ sin φ ] .
φ = tan - 1 ω θ
A = ( α k E 0 / γ b c p ) [ ( 1 / θ ) 2 + ω 2 ] - 1 2 ,
θ = γ b c p / ( 8 σ T m 3 ) .
φ = tan - 1 [ ( k E 0 / i 0 ) 2 - 1 ] - 1 2 ,
δ ( tan φ ) / tan φ = ( 1 + tan 2 φ ) [ δ ( k E 0 ) / ( k E 0 ) + δ ( i 0 ) / i 0 ] .
δ ( ) / = δ ( tan φ ) / tan φ .
δ ( α ) / α = 2 δ ( k E 0 ) / k E 0 + δ ( i 0 ) / i 0 + δ ( A ) / A .

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