УДК 533,9+536,46 This Book of Contributed Papers Includes the Original Abstracts of Lectures and Reports Presented at The
Total Page：16
File Type：pdf, Size：1020Kb
УДК 533,9+536,46 This book of contributed papers includes the original abstracts of lectures and reports presented at the International Workshop "Noncquilibrium Processes in Combustion and Plasma Based Technologies» (Minsk, August 23-28, 2008). Данный сборник трудов содержит оригинальные тексты лекций и докладов, представленных на международную научную конференцию "Неравновесные процессы в горении и плазменных технологиях" (Минск, 23-28 августа 2008 г.). Редакционная коллегия: Е.А. Матвейчик, А.Н. Мигун Рецензенты: Доктор физ.-мат. наук, академик НАН Беларуси С.А. Жданок Доктор техн.наук, чл.-корр. НАН Беларуси, профессор B.JI. Драгун доктор физ.-мат. наук, профессор Н.А. Фомин Институт тепло- и массообмена им. А. В. Лыкова НАН Беларуси, 2008 In Memory of Mikhail Nikolaevich ROLIN Mikhail Nikolaevich ROLIN was born in 1946. His youth, student days, and the beginning of his scientific work coincided with the best period in the history of the Soviet Union, when such notions as the collectivism and unselfishness were the reality of everyday life, the prestige of education was high, and many of the young people pursued the only object in life - SCIENCE that paved the way to outer space and where every working day promised meeting with the unknown. At that time of romanticism, talented young people selected the professions of physicists, chemists, mathematicians, biologists; half the century lay in wait till the dominance of financiers and managers. In 1969 Mikhail graduated from the V. I. Lenin Byelorussian State University in Minsk, Department of Atomic Physics, and went to work at the Heat and Mass Transfer Institute of the Academy of Sciences of the BSSR. His subsequent 39 years of work were devoted to the Heat and Mass Transfer Institute. His passion for the science and striving for cognition were the main traits of his character; he was entirely devoid of the pangs of vanity and craving for quick promotion. The difficulties of the years of "perestroika" (ideological reorientation) have not shaken Mikhail Nikolaevich - he kept being true to himself, to his principles, country, and the science. From the start of his working life Mikhail Nikolaevich has set a very high level of demands on the studies carried out. Any new topic was studied extensively and thoroughly and only then the methods and direction of search were outlined. His reports were thoroughly worked out with a clearly cut physical picture of the process studied. His replies to the questions posed were delightedly noteworthy for exactness and laconism, which is only possible in the case of the deepest mastery of the topic. There were changes in the trends of investigations and laboratories, where Mikhail Nikolaevich was on the staff, but unaltered remained the thoroughness of his studies, the elegance of the proposed models, and the effectiveness of the computational programs created by him. The list of his publications numbers 62 scientific works, plus 3 being in press. The range of his scientific interests was broad enough: various areas of nonequilibrium processes of the physics of plasma, the properties of heat shielding materials, gas dynamics, radiation of high-enthalpy gas flows, chemical kinetics, tomography, etc. In recent year Mikhail Nikolaevich has been engaged in research of the physicochemical processes occurring in various discharge facilities. He has become utterly engrossed in the creation of models to describe the barrier and microwave discharges. His self-consistent model of atmospheric pressure microwave discharge in inert gases ranks among scientific novelties of the worldwide level. Mikhail Nikolaevich has made a great contribution to the scientific activities of the Heat and Mass Transfer Institute by his works and his influence on the colleagues by pre- assigning the high level of discussions, sharing his knowledge and results of research with his colleagues. We have lost a very talented scientist, a specialist with encyclopedic knowledge in various areas of physics, engineering, and culture. Fond memories of this kind and pure person who personified the best traits of the Soviet scientist will long live in our hearts. Friends and colleagues 1. ELEMENTARY PROCESSES IN PLASMA AND COMBUSTION PHENOMENA ELECTRONIC ENERGY-EXCHANGE PROCESSES IN HIGH-TEMPERATURE AIR S.A. LOSEV, V.N. JARYGINA Institute of Mechanics, M.V. Lomonosov Moscow State University, Moscow, Russia The electronic states as electronic terms are the system of complicated energetic surfaces that differs from the notation of vibrational states in the form of separate energy-levels. The electronic state variation is the result of electronic energy-exchange at atoms/molecules collisions. These processes are accompanied by transition between various electronic potential surfaces as nonadiabatic transitions. The nonadiabatic transitions happen with high probability if potential surface come close or intersect. The electronic energy-exchange processes are connected with chemical processes, this suggests to consider electronic-chemical reactions. The goal function of processes under study is the coefficients in kinetic equations as the rate constants of electronic-chemical reactions. The analysis of kinetic processes with excited electronic states of atoms and molecules in high- temperature air is performed. 12 excited states with metastable levels of molecular and atomic oxygen, nitrogen and nitrogen oxide lower than energy of dissociation are considered. The formation of the excited electronic states in atoms and molecules is the result of recombination process, electronic energy-exchange by particles collisions, and chemical exchange reaction. The most rapid processes of the excited electronic states formation are taking place in atoms recombination and isoenergetic transfer of vibrational energy to electronic one from high-excited vibrational levels. The quenching of metastable particles is due to dissociation and to particles collisions. The excited electronic atoms and molecules are treated as separate components in gas mixtures with corresponding complexes of vibrational levels. The theoretical examination of rate constant values in electronic-chemical reactions is performed with the method of transient state for potential surface of collisional complex. The results of dynamic equation solution is the rate constants of these reactions. These values are cited only in two articles (Gonzalezet al [1], Tully [2]) under consideration of high- temperature air. The main values of rate constants of electronic-chemical reactions in high-temperature gas are received using experimental investigation results. These data are based on the analysis of research results in shock tubes, discharge flows, and other facilities. The analysis of experimental investigations has been given in six reviews, as well as in seven individual articles. The prepared complex of rate constants of electronic-chemical reactions in high- temperature air composes the corresponding database for temperatures above one to several thousands Kelvin degrees. This database includes the data on: formation of the excited electronic states as the results of atoms recombination (5 reactions), and particles collisions (9 reactions); electronic energy-exchange due to particles collisions (17 reactions), and atoms recombination (4 reactions); quenching of the excited electronic states of atoms and molecules due to particles collisions (13 reactions), and molecules dissociation (5 reactions). The rate constants are represented as parameters in Arrhenious formula. The procedure of model extension for dissociation (Kustova et al [3]), and chemical exchange reaction (Starik et al [4]) is supported to describe these processes involving molecules in the excited electronic states. The calculation leads to the conclusion that the values of rate constants for dissociation of oxygen molecules in accordance with Marrone-Treanor model differ by some orders for various electronic states. The excitation of electronic states leads to intensive radiation of atoms and molecules as a results of radiation of atoms and molecules as a result of different radiative transitions. The nonequiiibrium radiation essentially affects population of electronic states of atoms and molecules, so there is a need to take into account when solving physical and chemical kinetic problems. The created database on rate constants of electronic-chemical reactions in high- temperature air promotes the solution of kinetics problems. The absence of considering of excited electronic states in thermally nonequiiibrium processes leads to appreciable errors in gas parameters behind shock wave front. The comprehensive account of processes with the participation of atoms and molecules in excited electronic states along with consideration of vibrational excitation of molecules make the modeling of relaxational and reacting gas at high temperature more approximated to reality. References 2 3 1 Gonzalez M., Miquel I, Sayos R. VTST kinetics study of the N( D)+02(X)0( P, D) reactions based on CASSCF and CASPT2 ab initio calculations including excited potential energy surfaces // Chem. Phys. Letters. 2001. Vol. 335. Pp. 339-347. 1 Tully J.C. Collision complex model for spin forbidden reactions: Quenching of O( D) by N2 // J. Chem. Phys. 1974. Vol. 61. No. 1. Pp. 61-67. Kustova E.V., Aliat A., Chikhaoui A. State-to-state dissociation rate coefficients in electronically excited diatomic gases // Chem. Phys. Letters. 2004. Vol. 390. Pp. 370-375. Starik A.M., Titova N.S. Initiation of