Modern Shock Tube Methods for Chemical Studies in High Temperature Gases

摘要

Shock tube measurements are the primary source of chemical kinetic data for gases at high temperature, particularly above the temperature limit of heated steady-flow reactors (about 1500 K). During the past few years significant advances have been made in shock tube methods which enable more direct and quantitative measurements of elementary reactions than previously reported. Such refinements will lead to an improved kinetic data base useful, for example, in modeling nonequilibrium flows of air and combustion gases associated with advanced high-speed aircraft and transatmospheric vehicles. Here we discuss two areas of continuing activity in our laboratory, namely the development of improved diagnostic methods based on cw dye laser absorption spectroscopy and the development of a new laser-photolysis shock tube for direct studies of reactions involving reactive radical species. Reprints.(aw)