Accession Number : AD0455747


Title :   THERMODYNAMIC AND COMPOSITION DATA FOR CONSTANTVOLUME COMBUSTION OF STOICHIOMETRIC MIXTURES OF HYDROGEN-OXYGEN DILUTED WITH HELIUM OR HYDROGEN,


Corporate Author : TORONTO UNIV DOWNSVIEW (ONTARIO) INST FOR AEROSPACE STUDIES


Personal Author(s) : Benoit, Andre


Report Date : Nov 1964


Pagination or Media Count : 1


Abstract : An analysis is presented for the computation of thermodynamic properties and composition of burned gases resulting from the combustion at constant volume of the initial mixture (2 + m) H2 + O2 + nHe, for any initial pressure. Calculations were performed for the two limiting cases of He dilution (m = O) and H dilution (n=O) which are used as driver gases for launchers, shock tubes, and shock tunnels. Since for a given dilution, H provides normally a lighter post-combustion gas than He, a higher escape speed but lower final-to-initial temperature and pressure ratios, it is clear that for particular techniques a mixed dilution may lead to the optimum post-combustion conditions. The same program permits the computation of the thermodynamic properties resulting from such mixed dilutions, i.e., when m and n are both different from zero. The calculations were based on the following main assumptions: no other species than H2O, OH, H2, O2, H, O and He are present, the gases in the final products are in thermodynamic equilibrium, all the species obey the thermally perfect gas law, and the system is free from external influence. The accuracy of the results decreases when the final temperature decreases. (Author)


Descriptors :   *HYDROGEN , *OXYGEN , *COMBUSTION , THERMODYNAMICS , THERMODYNAMICS , THERMODYNAMICS , THERMOCHEMISTRY , HELIUM , LAUNCHING , SHOCK TUBES , TABLES(DATA) , MATHEMATICS , SIMULATION , CANADA


Distribution Statement : APPROVED FOR PUBLIC RELEASE