Experimental research into D-243 diesel engine operation when supplying rapeseed oil at intake event

The analysis of application of alternative kind of fuel on the basis of rapeseed oil in the fuel system of the diesel engine is given in the article. The results of experimental research of technical and economic and ecologi­cal characteristics of D-243 diesel engine operation when supplying rapeseed oil into intake manifold are given. The optimum concentration of supplied rapeseed oil within 5 % without adjustment of the fuel equipment of the engine is defined.Дан анализ применения альтернативного вида топлива на основе рапсового масла в системе пита­ния дизельного двигателя. Приведены результаты экспериментальных исследований технико­-экономических и экологических показателей работы дизельного двигателя Д-243 при подаче рапсового масла во впускной коллектор. Определена оптимальная концентрация подаваемого рапсового масла в пределах 5 % без изменения регулировок топливной аппаратуры двигателя

Accelerating units for commercial resonator LINACs model UELR-10-10S designed for radiation sterilization development and results of testing

Some specific design features of the accelerating units for LINACs model UELR-10-10S designed for radiation sterilization and the electron beam characteristics obtained experimentally are considered.Описываются некоторые особенности конструкции ускорителей модели УЭЛР-10-10С, приводятся и обсуждаются характеристики электронного пучка, полученные экспериментально.Описуються деякі особливості конструкції прискорювачів моделі УЕЛР-10-10С, приводяться і обговорюються характеристики електронного пучка, отримані експериментально

Feasibility studies for the measurement of time-like proton electromagnetic form factors from p¯ p→ μ+μ- at P ¯ ANDA at FAIR

This paper reports on Monte Carlo simulation results for future measurements of the moduli of time-like proton electromagnetic form factors, | GE| and | GM| , using the p¯ p→ μ+μ- reaction at P ¯ ANDA (FAIR). The electromagnetic form factors are fundamental quantities parameterizing the electric and magnetic structure of hadrons. This work estimates the statistical and total accuracy with which the form factors can be measured at P ¯ ANDA , using an analysis of simulated data within the PandaRoot software framework. The most crucial background channel is p¯ p→ π+π-, due to the very similar behavior of muons and pions in the detector. The suppression factors are evaluated for this and all other relevant background channels at different values of antiproton beam momentum. The signal/background separation is based on a multivariate analysis, using the Boosted Decision Trees method. An expected background subtraction is included in this study, based on realistic angular distributions of the background contribution. Systematic uncertainties are considered and the relative total uncertainties of the form factor measurements are presented

Process Modelling Vertical Screw Transport of Bulk Material Flow

AbstractVertical screw conveying bulk and powdered materials are an integral part of many production processes in various industries and agriculture. With a wide range of applications in various industries, vertical screw conveyors, along with such qualities as the ease of construction, the continuity of transportation, integrity, the ability to transport and dusty badly smelling goods, have a significant drawback - the material, in addition to the translational motion in the direction of the axis of the conveyor, makes a rotary movement towards the peripheral speed of the screw, which reduces the productivity and increases the power consumption of the conveyor. The use of a simplified model of the movement of the material leads to the creation of inefficient machines, the structure and parameters of working bodies of which differ significantly from optimal. Adequate mathematical description of this process should allow the designers to significantly improve the efficiency of the vertical screw conveyors by means of calculation and selection of optimum values for the geometrical, kinematic and dynamic parameters of working bodies

Effect of temperature and magnetic fields on the structural state of the Fe-Zr-B amorphous alloy below crystallization temperature

Amorphous materials give the possibility to observe the phase and structural transformations in sufficiently narrow temperature intervals with the retention of their unchanged chemical composition. The present report is concerned with the results of the study of structure evolution and its dependence on magnetic field upon heating in the Fe-Zr-B amorphous alloy by the method of the photometric analysis of structural images (PHASI). The PHASI method makes it possible to establish the effect of external temperature and magnetic fields on the brightness spectra of the reflection from the surface of the object under study and the distribution of the zones, in which these changes are localized. The established temperature dependence of the energy characteristics of the reflection brightness spectrum in arbitrary units indicates the complex structural transformations caused by heating of the alloy under study. Also it is shown that the magnetic field produces residual structural changes in the alloy in comparison with its initial stat

The problem of creating an automated system to control growth of single crystal sapphires from melt as a problem of control and monitoring of a complex nonlinear and dynamic system

The paper mentions some problems of automated control system development for growth of large (150 kg and above) single crystal sapphires. We obtain an analytical equation for the temperature distribution and thermal stresses along the crystal axis during the growth phase. An analysis was carried out and numerical estimates were obtained for the axial distribution of components of thermoelastic stresses depending on the physical, optical, and geometric parameters of the crystal. It is shown that the cause of thermal stresses and blocks during crystal growth is the nonlinear temperature dependence of thermal conductivity and thermal expansion coefficients