SOME POSSIBILITIES OF USING GAS MIXTURES OTHER THAN AIR IN AERODYNAMIC RESEARCH

摘要

A study is made of the advantages that can be realized in compressible-flow research by employing a substitute heavy gas in place of air. Most heavy gases considered in previous investigations are either toxic chemically active, or (as in the case of the Freons) hare a ratio of specific heats greatly different from air. The present report is based on the idea that by properly mixing a heavy monatomic gas with a suitable heavy polyatomic gas, it is possible to obtain a heavy gas mixture which has the correct ratio of specific heats and which is nontoxic, nonflamma­ble, thermally stable, chemically inert, and comprised of com­mercially available components.