21 Result(s)

Article

Concept of turbines for ultrasupercritical, supercritical, and subcritical steam conditions

The article describes the design features of condensing turbines for ultrasupercritical initial steam conditions (USSC) and large-capacity cogeneration turbines for super- and subcritical steam conditions havi...

V. E. Mikhailov, L. A. Khomenok, I. I. Pichugin, I. A. Kovalev… in Thermal Engineering (2017)

Article

Start-up circuit upgrading to reduce the erosion of the rotor blades of the last stages of steam turbines and prevent the mass strips of stellite plates

At turbine starts with low steam flow rates in idle mode, the low-pressure rotor blades consume energy, causing the ventilation heating of the stages and creating higher depression in them than in the condense...

V. V. Bozhko, A. V. Gorin, I. V. Zaitsev, I. A. Kovalev… in Thermal Engineering (2017)

Article

Operational diagnostics of thermal state and efficiency of steam turbines of TPP and NPP

Various ways for solving complex problems of the strength and operating life of steam turbines of TPP and NPP are studied. Diagnostic characters and technical possibilities for their control during the steam t...

V. V. Bozhko, A. N. Kovalenko, V. M. Lyapunov, L. A. Khomenok in Thermal Engineering (2016)

Article

On the preparation and photoelectric properties of Tl_1–x In_1–x Sn _x Se₂ (x = 0.1–0.25) alloys

The technological conditions for growing single crystals of Tl_1–x In_1–x Sn _x Se₂ (x = 0.1–0.25) alloys are develop...

S. P. Danylchuk, G. L. Myronchuk, M. Yu. Mozolyuk, V. V. Bozhko in Semiconductors (2016)

Article

Specific features of the low-temperature conductivity and photoconductivity of CuInSe₂-ZnIn₂Se₄ alloys

n-type CuInSe₂-ZnIn₂Se₄ alloy single crystals are grown by the horizontal variant of the Bridgman method. The slight temperature dependence of the conductivity, high electron concentratio...

V. V. Bozhko, O. V. Novosad, O. V. Parasyuk, N. Vainorius, A. Sakaviciues… in Semiconductors (2014)

Article

Influence of cation-vacancy imperfection on the electrical and photoelectric properties of the Cu_{1 − x} Zn _x InS₂ alloy

The growth technology of single crystals of Cu_{1 − x} Zn _x InS₂ alloys (x = 0–12) of n-type conductivity is developed. The formation mechanism of the alloy is inves...

A. V. Novosad, V. V. Bozhko, H. E. Davydyuk, O. V. Parasyuk… in Semiconductors (2014)

Article

Optoelectronic features of novel infrared CuInS₂–ZnIn₂S₄ crystalline alloys

Novel promising CuInS₂–ZnIn₂S₄ elastoptical crystalline alloys which is operated by light is synthesized. Investigation of photoconductivity and IR-induced piezooptic effect has been performed for novel synthesiz...

V. R. Kozer, V. V. Bozhko, O. V. Parasyuk… in Journal of Materials Science: Materials in… (2014)

Article

Influence of technological defects on the optical and photoelectric properties of AgCd_{2 − x} Mn _x GaSe₄ alloys

The study is concerned with the photoelectric and optical properties of a AgCd_{2 − x} Mn _x GaSe₄ alloy with a Mn → Cd isovalent substitution. The positions ...

A. P. Tretyak, H. Ye. Davydyuk, V. V. Bozhko, L. V. Bulatetska… in Semiconductors (2012)

Article

Comprehensive diagnostics as a necessary tool for ensuring operational reliability of turbine units

The EXPERT monitoring and diagnostic system is described. Tasks solved by means of its sub-systems are formulated, and experience gained from using the EXPERT system at power stations is generalized.

I. A. Kovalev, N. Yu. Isakov, V. V. Bozhko in Thermal Engineering (2012)

Article

Extending the service life of steam turbines using the systems for cooling the thermally stressed parts of high- and intermediate-pressure cylinders

The problem of extending the service life of a large fleet of operating steam turbines is considered. A method for reducing the damageability of the most thermally stressed parts of steam turbines with capacit...

L. A. Khomenok, V. V. Bozhko, I. S. Leonova, I. V. Zaitsev… in Thermal Engineering (2012)

Article

Influence of defects formed by fast reactor neutrons on exciton luminescence spectra of cadmium sulfide single crystals

The influence of clusters of defects formed by irradiation with neutrons in CdS single crystals on parameters of the spectra of exciton photoluminescence at T ∼ 4.2 K has been studied. It is experimentally establ...

G. E. Davidyuk, N. S. Bogdanyuk, V. V. Bozhko, A. H. Kevshyn… in Semiconductors (2010)

Article

Features of subthreshold defect formation in CdS and CdS:Cu single crystals subjected to irradiation with X-ray photons

Experimental results of the study of the effect of irradiation with 230-keV electrons and with X-ray photons with energies of 8.06 and 17.5 keV and the effect of quenching on the formation and reconstruction o...

G. L. Mironchuk, H. Ye. Davidyuk, V. V. Bozhko, V. Kažukauskas in Semiconductors (2010)

Article

Special features of the mechanism of defect formation in CdS single crystals subjected to irradiation with high doses of fast reactor neutrons

Electrical and optical properties of CdS single crystals irradiated with a dose ≥10¹⁸ cm⁻² of fast reactor neutrons have been studied. It is established that clusters of defects are formed in irradiated material,...

H. Ye. Davydyuk, A. H. Kevshyn, V. V. Bozhko, V. V. Halyan in Semiconductors (2009)

Article

Specific features of the effect of irradiation with electrons and neutrons on photoelectric properties of CdS single crystals nominally undoped and doped with Cu

Electrical, photoelectric, and magnetic properties of CdS single crystals undoped and doped with copper (N _Cu ≈ 10¹⁸ cm⁻³) and irradiated with electrons (E = 1.2 MeV, Φ = 2 × 10¹⁷ cm⁻²) an...

H. Ye. Davidyuk, V. V. Bozhko, L. V. Bulatetska in Semiconductors (2008)

Article

Optical and photoelectrical properties of AgCd₂GaS₄ single-crystal compounds

The poorly known AgCd₂GaS₄ single-crystal compounds that crystallize in a rhombic structure (space group Pmn2₁) are studied. Deviations from the stoichiometric composition of the samples and random occupation of ...

L. V. Bulatetskaya, V. V. Bozhko, G. E. Davidyuk, O. V. Parasyuk in Semiconductors (2008)

Article

Special features of optical and photoelectric properties of nominally undoped and Cu-doped CdS single crystals

Experimental data on the effect of fast reactor neutrons on the absorption spectra, photoconductivity, and luminescence of nominally undoped and Cu-doped CdS single crystals are reported. It is shown that defe...

G. E. Davidyuk, V. V. Bozhko, G. L. Mironchuk, L. V. Bulatetskaya… in Semiconductors (2008)

Article

Influence of the defect state of samples on the luminescence spectra of CdS single crystals irradiated by electrons

The photoluminescence spectra of CdS single crystals irradiated by electrons (E = 1.2 MeV, Φ = 2×10¹⁷ cm⁻²) are investigated in the visible and near-infrared regions of electromagnetic radiation. Some samples of ...

G. E. Davidyuk, V. V. Bozhko, G. L. Mironchuk… in Physics of the Solid State (2007)

Article

An Analysis of the Warm-Up Regime for a K-300-240 Turbine Plant Started at Different Temperatures

V. S. Shargorodskii, L. A. Khomenok, V. V. Bozhko… in Power Technology and Engineering (2002)

Article

Photostimulation of photoconductivity in electron-irradiated CdS:Cu single crystals

We have studied the photoconductivity of CdS:Cu single crystals irradiated by fast electrons. When the density of fast recombination centers (s-centers) due to the electron irradiation is high, one observes ph...

G. E. Davidyuk, N. S. Bogdanyuk, V. V. Bozhko in Soviet Physics Journal (1989)

Article

Rearrangement of defects in single crystals of cadmium sulfide irradiated with fast electrons

This study exaines CdS single crystals subjected to a special nonalloying treatment, alloyed with copper, and annealed in a cadmium atmosphere. Irradiation of the test specimens by electrons with E ≈ 1.2 MeV l...

V. M. Tsmots', G. E. Davidyuk, N. S. Bogdanyuk, V. V. Bozhko… in Soviet Physics Journal (1988)