Rocket Exhaust Sampling System for Two Phase Exhaust Flow Systems
Abstract
The attractiveness of high boron content fuels for use in rocket motors has decreased somewhat due to the low performance obtained experimentally. Theoretically, high specific impulse at low chamber temperature is possible with such systems as and B10H14-N2H4if the products of combustion contain only BN and H2. Since the actual performance obtained is dependent upon the degree of reaction completion a knowledge of the composition of the exhaust products would be useful. The most direct method of determining exhaust composition is by sampling the products and subsequent chemical analysis. This method has seldom been used in rocketry due to high temperatures, high heat fluxes and the nature of the chemical reactions. It is quite useful however, as a research tool for verification of thermochemical confutations, to determine the effects of motor modifications, and in twophase flow systems, to determine the properties of the solid particles. As part of a boron hydride program recently conducted by the Reaction Motors Division of Thiokol Chemical Corporation an exhaust sampling probe was developed and successfully used to determine the chemical composition of the motor exhaust with the B2H5-N2H4 combination. The program ended before the sampling system could be optimized to give solids-gas ratios or particle size.The primary object of the present program was to develop a rocket engine two-phase exhaust sampling system to collect a representativeexhaust sample during the steady state portion of engine operation from which the exhaust solids to gas ratio and solid particle size could bedetermined. In addition, it was required that l) a preliminary sampling system and 2) a general purpose sampling system be designed, fabricated and delivered for use in two-phase flow exhaust sampling. The purpose of the preliminary sampling system was to permit test crew familiarization with sampling techniques and to provide preliminary exhaust gas data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 28, 1961
- Accession Number
- AD0299245
Entities
People
- J. I. Schaeffer