SPECTRAL RADIOMETRY AND TWO-PATH PYROMETRY OF ROCKET EXHAUST JETS
Abstract
Knowledge of the temperature and radiative properties of the exhaust jets from modern rocket engines can only come from direct measurements of the spectral radiance of the exhaust products. The fundamental relations governing radiative transfer are briefly reviewed, and the methods of relating the observed spectral radiance of a gaseous source to its intrinsic properties are outlined. The inhomogeneous character of rocket exhaust jets is illustrated. Descriptions are given of several unique instruments of exhaust radiation: a telespectrograph, for measuring spectral radiance in the ultraviolet and visible; an infrared spectral and total teleradiometer for similar measurements in the infrared; a photographic pyrometer and a Two-Path Spectral Radiometer for two-path measurements of gas temperature and spectral emissivity. Typical results obtained with the various instruments are presented and discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0257483
Entities
People
- Arthur G. Debell
- Frederick S. Simmons