Development and study of boilers with a ring furnace using different coals

This is a critical analysis of the profiles of boilers with nontraditional ring furnaces for 330 and 600MWunits operating with different coals. The ANSYS FLUENT mathematical simulation software has been used in this work. Data on the temperature distributions in the boiler, the nitrogen oxide concentrations, and a large amount of other simulation results and calculations are presented which are important for further improvements in the technology of boilers with ring furnaces.     

A Neutron Spectrometer for Experiments with Radioactive Beams on the ACCULINNA-2 Fragment Separator

A neutron spectrometer based on stilbene crystals has been developed by the Flerov Laboratory of Nuclear Reactions at the Joint Institute for Nuclear Research (Dubna, Russia). The timing resolution is determined as a function of the signal amplitude (σT = 0.18 ns at an amplitude of 1 MeV in the electron equivalent). The measured energy resolution of the detecting modules for γ rays is σE/E = 4.5% at E = 1 MeV. The quality of the n–γ discrimination is investigated. It is shown that reliable discrimination is possible, beginning with a deposited energy of 100 keV in the electron equivalent, which corresponds to the kinetic energy of recoil protons of ～700 keV. The neutron spectrometer helps to significantly expand the experimental capabilities and to carry out correlation experiments with radioactive beams on the ACCULINNA-2 fragment separator at a new level of quality.     

Use of chemical and metallurgical methods for processing of gabbro-basalt raw material

The recovery of silica and the mixture of iron and aluminum oxides, as well as associated valuable elements, from hydrochloric acid solutions obtained after the desalination of the products of the sintering of wastes of gabbro-basalt raw material with soda by hydrochloric acid has been experimentally studied. A scheme of the integrated utilization of gabbro-basalt raw material involving chemical and metallurgical methods has been suggested.     

Investigation of a high-frequency discharge initiated across a hypersonic air flow and a magnetic field

Burning of a high-frequency (HF) discharge initiated across a hypersonic air flow and a magnetic field, as well as accompanying effects, is investigated experimentally. The essential influence of the HF discharge in the magnetic field near a flat plate on the conditions of flowing around the model, particularly on the configuration of attached compression shocks, is shown.     

Use of a computer molecular simulation to describe lubricating layer structure

The potential of methods of computer molecule dynamics for determining the characteristics of lubricating layers are considered for hydrodynamic and boundary lubrication regimes. Examples of finding parameters of adsorption, supermolecular self-organization, and rheology in lubricating layers are given for model lubricants.     

Modular high frame rate detector for synchrotron applications

The development of detectors often lags the development in X-ray sources. However, advanced detectors are critical for fully utilizing and exploiting the capabilities of the new bright sources. We report on the development of a modular high frame rate detector for synchrotron applications such as small angle X-ray scattering (SAXS) and wide angle X-ray scattering (WAXS). The detector consists of four modules, each providing an imaging area of 5×5 cm(2) and capable of frame rates of 200 frames per second (fps) with full resolution, and 650 fps with smaller region of interest (ROI). Details of the detector design and experiments at synchrotron beamlines are discussed in the paper.