Transactions of Academenergo 2008 №4

HEAT EXCHANGE AND HYDRODYNAMICS AT CRITICAL MODES FOR UNNJUTONIAN LIQUID ON THE INITIAL SITE OF THE COAXIAL CHANNEL
B.R. Abajdullin

e-mail: cyberincorp@mail.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: unnjutonian liquid, intensity of a chemical source, critical areas, tenzor of speed of deformation, a structurally-viscous liquid, intensity dissipative source of thermal emission
Abstract: In the given work is the mathematical model of critical modes of heat exchange at current unnjutonian liquid on an initial site of the coaxial channel presented. The results of numerical research are in the form of distributions of temperature, axial and radial a component of speed and viscosity on length and on radius of the channel are given. On border of the channel are thermal boundary conditions of the first sort set.

 THE HIGH EFFECTIVE SPECIFIC HEAT CHANGING APPARATUS ON FOUNDATION OF SPECIFIC HEAT CHANGING ELEMENTS IN SIGHT OF SPRING-TWISTED PIPE
Evseev E.S., Zolotonosov A.YA., Zolotonosov JA.D.

 e-mail: zolotonosov@mail.ru
Limited Liability Company “Progress”
Kazan State Power Engineering University
Keywords: spring-twisted and smooth pipes, the coefficient of the heat-giving, heat changing apparatus
Abstract: There id considered the modernization possibility of heat changing equipments on foundation of spring-twisted heat changing elements, there was defined the coefficient of the heat-giving the through the spring-twisted side, there is comparison of modernization apparatus the heat producer with the know smooth-pipe heat-changing equipments, also there was produced the economic note of metal to manufacture measure of meters spring-twisted canal comparing with manufactures of linear meters smooth pipe.

e-mail: bryakina@list.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: porous rotary sprayers, cleaning, pollutions, sprayer materials, drop size, property, dispersion composition, operational regime.
Abstract: А new type of porous rotary sprayers for spraying in narrow fractions was studied, and the principles of spraying liquids from the surface of porous rotary sprayers were formulated.

DYNAMIC OF LIQUID FILM FLOW IN THE CANONS WITH HIGH SCALE REGULAR ROUGH SURFACE.
Nikolaev A.N.

e-mail: andr_nik_nik@rambler.ru
Kazan State Technical Kirov’s University
Keywords: liquid, tangential stresses, rough surface
Abstract: A phisical model is proposed for the flow a liquid in the indentations of a high scale regular rough surface, which is in good agreement with known experimental evidence. On the basis the proposed physical model of flow, a method has been developed for calculating tangential stresses in movement of liquid film along a rough surface.

CONSTRAINT PARAMETERS CALCULATION AND STRUCTURAL COMPONENTS IN HIGHER ORDER TERM DECOMPOSITION.
Kislova S.YU., Shlyannikov V.N.

e-mail:  svetlana_kislova@mail.ru, shlyannikov@mail.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: constraint and mixity parameters, crack angle, finite element analysis, small-scale yielding, elastic-plastic material
Abstract: Method for investigation of mixed mode crack behavior accounting for crack-tip curvature and high order term expansion is presented. Both qualitative and quantitative effects of mixed mode loading influence are stated. Mode-mixity parameters behavior accounting for crack tip curvature, crack growth direction angle and elastic – plastic material properties is analyzed. By fitting numerical results empirical formula was obtained to describe dependence between constraint and mode mixity parameters.

PIPELINE FATIGUE LIFE PREDICTION BY LIMITING STRAINS UNDER BIAXIAL LOADING.
Shlyannikov V.N., Shagivaleev R.F.

e-mail: shlyannikov@mail.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: fatigue life, pipeline, limiting strains, surface crack growth, fracture process zone, static and low-cycle biaxial loading
Abstract: On the base the Pisarenko-Lebedev limiting state theory limiting strains equations for biaxial both static and low-cycle loading conditions are obtained. The numerical results of a part-through crack growth and fatigue life modeling for pipeline containing surface defect under both cyclic internal pressure and tension/compression loading are presented. The total regularities of crack growth for variation of the pipeline geometry from thin- to thick-walled cylinder, an initial crack shape from oblong semi-elliptical  up to true half-circular, depth of the initial crack from shallow surface up to deep part-through has been established.  The evaluation is given for influence on the crack growth rate and fatigue life of a fracture stress caused by different process zone sizes and also critical plastic strains stipulated by various nominal stress biaxial ratio.

DEFINITION OF THERMODYNAMIC PROPERTIES OF BITUMEN ON THE BASIS OF SIMULATION THEIR FRAMES.
Ermolaev D.V., Mingaleeva G.R.

e-mail: denis-yermolaev@mail.ru, mingaleeva-gr@mail.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: bitumen, thermal capacity, enthalpy, entropy
Abstract: In work calculated values of thermal capacity, entropy and the enthalpy of bitumens received under the method of application, grounded on definition of hybrid states of carbon atoms and numbers of atoms of the hydrogen linked to them chemically are introduced. For check of adequacy of the applied method of application comparison of calculated data of heat capacity with experimental values in temperature range 25-300ºC has been held. Reception of values of thermodynamic properties of bitumens allows to hold an estimation of performance of technological schemas of their complex use.

THE THERMODYNAMIC ANALYSIS OF PROCESS OF DECOMPOSITION OF THE BASIC FUNCTIONAL GROUPS OF ORGANIC MASS OF COAL.
Pyatygina M.V., Mingaleeva G.R.

e-mail: pmv_83@mail.ru, mingaleeva-gr@mail.ru
Research Center of Power Engineering Problems of the Russian Academy of Sciences
Keywords: thermodynamic parameters, additive method of calculation of thermodynamic functions, structural fragments of organic mass of coal
Abstract: On the basis of an additive method of calculation of thermodynamic functions for structural fragments of organic mass of coal the modeling connections forming organic mass of coal and products of their decomposition in the course of thermo chemical processing of coal have been considered. Also the method of the thermodynamic analysis with reference to concrete connections of coal is described. As a result of modeling of process of decomposition of organic mass of coal possibility of course of reactions of decomposition on the basis of calculation of thermodynamic parameters – enthalpy, entropy and Gibbs energy has been estimated.