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Issue 2/2013ABSTRACTS: UDK 539.125.523 AN APPROXIMATE METHOD FOR EVALUATION OF NEUTRON R PHYSICAL PARAMETERS IN OPTICALLY THICK UNIFORM MEDIA CONSISTING OF LIGHT NUCLEI AND ADMIXTURES OF FISSILE MATERIALS AND NEUTRON ABSORBERS / N. B. Babichev, S. A. Serov // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 3–7.An approximate method has been developed for evaluation of neutron spectrum and other physical parameters in infinite and optically thick uniform media consisting of light nuclei with mass number A≠1 and admixtures of fissile materials and neutron absorbers. The approximate correlation developed include thermal motion of light nuclei that has a considerable effect on the formation of slow in the course of their therrmalization. UDK 530.145.7; 514.764.2; 530.145.7 A SIMPLE METHOD FOR SOLVING THE Z > 137 PROBLEM FOR ENERGY LEVELS OF HYDROGEN-LIKE ATOMS / V. P. Neznamov, I. I. Safronov // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 8–15. The «catastrophe» in solving the Dirac equation for an electron in the field of a point electric charge, which emerges for the charge numbers Z > 137, is removed in this work by effective accounting of finite dimensions of nuclei. For this purpose, in numerical solutions of equations for Dirac radial wave functions, we introduce a boundary condition at the nucleus boundary rN=(1,2÷1,4)·10-13·A1/3 cm such that the φ-component of the electron current density is zero. As a result, for all nuclei of the periodic table, 1 ≤ Z ≤ 105, the calculated energy levels practically coincide with the energy levels in standard solutions of the Dirac equation in the external field of the Coulomb potential of a point charge. Further, for Z > 105, the calculated energy level functions E(Z) are monotone and smooth. The lower energy level 1S1/2 reaches the energy E=-mc2 (the electron «drop» on a nuclei) at Zc ≅ 185. The proposed method of accounting of the finite size of nuclei can be easily used in numerical calculations of energy levels of many-electron atoms. UDK 532.517.4 NUMERICAL SIMULATION OF THE FLOATING JET FORMATION USING k-ε TURBULENCE MODEL / A. R. Guzhova, G. V. Zharova, V. P. Statsenko, Yu. V. Yanilkin // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 16–29. Turbulence development in the gravitational field in case of a lighter liquid from a local source flowing into the uniform incompressible environment is simulated numerically. The calculations are carried out with 2D EGAK-T code using a modern version of the k-ε turbulence model. The calculation results are compared with the available experimental data. UDK 534.14 ON PROBLEM OF ECCENTRIC VIBRATOR / B. B. Baydyusenov, S. I. Gerasimov, V. I. Erofeev, V. A. Kikeev // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 30–34. The eccentric vibrator was investigated as two-mass system with two degrees of freedom. Designed mathematical model of the motion of the eccentric vibrator allowed to define two own frequencies of oscillations of the mechanical system. To confirm nominated theoretical positions the modeling of the motion of the eccentric vibrator was organized in the ADAMS software complex. The basic data at modeling were masses of bodies and the rigidity of mechanical bindings. It is confirmed that the calculation of dynamic characteristics of the vibrator on the definition of its own frequencies of oscillations is in good agreement with the modeling. UDK 533.6.05 ESTIMATION OF EFFICIENCY FOR THE RECORDING EQUIPMENT FOR MISSILE TEST TRACK / S. I. Gerasimov, V. I. Erofeev, V. A. Kikeev // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 35–39. Calculation of aerodynamic flow around the part of the video recording block is made in the conditions of aeroballistic experiment. Estimation of the durability and the eigenfrequencies of the recording equipment used in the aeroballistic experiment is made. The conclusion about the efficiency of the equipment is represented. UDK 533.6.05 THE USE OF POINT GAS-DISCHARGE LIGHT SOURCE IN THE COMBINED SCHEMES FOR HIGH-SPEED PHOTO RECORDING / S. I. Gerasimov, V. I. Erofeev, A. V. Speransky, K. V. Totyshev // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 40–45. The schemes of shadow photography, designed for registration in aero-ballistic experiments, are described. The algorithm for determining the parameters of such schemes and requirements to the light source characteristics (duration, brightness temperature) is given. The gas-discharge emitter satisfying for use in these schemes is described. The results of practical aero-ballistic tests using such schemes are shown. UDK 530.12:531.51 PROBLEM OF COLLAPSE IN THE GENERAL RELATIVITY THEORY AND POSSIBLE APPROACHES TO ITS SOLUTION (Part 1) / M. V. Gorbatenko, V. P. Neznamov // VANT. Ser.: Theoret. i prikl. fizika. 2013. N 2. P. 46–57. In order to overcome a trouble of conceptual nature the General Relativity Theory is faced with at describing strong gravitational fields it’s proposed to take into account renormalized the Matter Tensor that describe quantum polarization of space-time. The Structure the Tensor proposed by Pushkin coincides with Matter Tensor in Generalized Conformally Invariant Manner of Equations of General Relativity Theory. In Extreme States (for existence at collapses) taking into account Weyl’s degrees of freedom brings into state of an emergence horizons of events but jump surfaces on changes solution type are arise. The Changes are transitions from one branch to another so Result Solution is regular. |
