Chemical kinetics in air flows in nozzles

Non-equilibrium flows of the 5-component air mixture N2/O2/NO/N/O in nozzles are studied taking into account dissociation, recombination and exchange reactions. In the frame of the onetemperature description, variation of the gas temperature, velocity and air composition along a nozzle axis is studied numerically for different conditions in a reservoir. The influence of models for reaction rate coefficients and a nozzle profile on gas flow parameters is shown as well as the role of exchange reactions and recombination. The gas temperature and velocity calculated for 5-component air mixture are compared with ones found for binary mixtures N2/N and O2/O.

nozzle flows, chemical kinetics, dissociation, recombination, exchange reactions

Volume 17, issue 2, 2016 year

Химическая релаксация в потоках воздуха в соплах

Исследуются течения пятикомпонентного воздуха N2/O2/NO/N/O в соплах с учетом неравновесных химических реакций диссоциации, рекомбинации, обмена атомами при возбуждении колебательных степеней свободы молекул. На основе однотемпературного описания численно изучено изменение состава смеси, температуры и скорости вдоль оси сопла при разных условиях в форкамере. Показано влияние моделей скорости химических реакций, реакций рекомбинации и обмена и формы сопла на параметры течения. Представлено сравнение температуры и скорости в потоках пятикомпонентного воздуха и бинарных смесей N2/N и O2/O.

течения в соплах, химическая кинетика, диссоциация, рекомбинация, обменные реакции

Volume 17, issue 2, 2016 year

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