Abstract

The theory of the two path-length method for optically determining flame temperature is reviewed, and the requirements for quantitative photographic measurement are presented. Apparatus which includes a camera with the necessary combination of film and filters to accept light in a narrow wavelength interval, and several adjustable lamps to serve as standard sources, is described. The film record contains an image of the rocket exhaust jet adjacent to the images of the lamp filaments whose temperatures are known from a previous calibration with an optical pyrometer. Comparison of measured intensities with and without a reflector behind the flame yields the emittance and flame temperature. Some results of measurements at the exit regions of rocket nozzles affording nearly optimum expanison are presented. The utility of the method in rocket performance studies is discussed.

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  1. D. W. Male, Rev. Sci. Instr. 22, 769 (1951).
  2. P. J. Dyne and S. S. Penner, J. Am. Rocket Soc. 23, 174 (1953).
  3. ASA Z10.4, Trans. Am. Soc. Mech. Engrs., p. 17, 1943.
  4. J. C. DeVos, Physica 20, 690 (1954).
  5. V. N. Huff and A. Fortini, "Theoretical performance of JP-4 fuel and liquid oxygen as a rocket propellant. I-Frozen composition," Natl. Advisory Comm. Aeron. RME 56 A27 (1956).
  6. Huff, Fortini, and Gordon, "Theoretical performance of JP4 fuel and liquid oxygen as a rocket propellant. II-Equilibrium Composition," Natl. Advisory Comm. Aeron. RME 56 D23 (1956).
  7. H. G. Wolfhard and W. G. Parker, Proc. Phys. Soc. (London) 62, 523, (1949).

DeVos, J. C.

J. C. DeVos, Physica 20, 690 (1954).

Dyne, P. J.

P. J. Dyne and S. S. Penner, J. Am. Rocket Soc. 23, 174 (1953).

Fortini, A.

V. N. Huff and A. Fortini, "Theoretical performance of JP-4 fuel and liquid oxygen as a rocket propellant. I-Frozen composition," Natl. Advisory Comm. Aeron. RME 56 A27 (1956).

Huff, V. N.

V. N. Huff and A. Fortini, "Theoretical performance of JP-4 fuel and liquid oxygen as a rocket propellant. I-Frozen composition," Natl. Advisory Comm. Aeron. RME 56 A27 (1956).

Male, D. W.

D. W. Male, Rev. Sci. Instr. 22, 769 (1951).

Parker, W. G.

H. G. Wolfhard and W. G. Parker, Proc. Phys. Soc. (London) 62, 523, (1949).

Penner, S. S.

P. J. Dyne and S. S. Penner, J. Am. Rocket Soc. 23, 174 (1953).

Wolfhard, H. G.

H. G. Wolfhard and W. G. Parker, Proc. Phys. Soc. (London) 62, 523, (1949).

Other

D. W. Male, Rev. Sci. Instr. 22, 769 (1951).

P. J. Dyne and S. S. Penner, J. Am. Rocket Soc. 23, 174 (1953).

ASA Z10.4, Trans. Am. Soc. Mech. Engrs., p. 17, 1943.

J. C. DeVos, Physica 20, 690 (1954).

V. N. Huff and A. Fortini, "Theoretical performance of JP-4 fuel and liquid oxygen as a rocket propellant. I-Frozen composition," Natl. Advisory Comm. Aeron. RME 56 A27 (1956).

Huff, Fortini, and Gordon, "Theoretical performance of JP4 fuel and liquid oxygen as a rocket propellant. II-Equilibrium Composition," Natl. Advisory Comm. Aeron. RME 56 D23 (1956).

H. G. Wolfhard and W. G. Parker, Proc. Phys. Soc. (London) 62, 523, (1949).

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