The low pressure (LP) exhaust system presents a promising avenue for improving the performance of large steam turbines. For this reason, LP exhaust systems have attracted the attention of the research community for decades. Nevertheless, we still lack understanding of the flow physics and loss mechanisms in the exhaust system, especially at part-lo...
Metallurgical and Materials Transactions A
Increasing amount of tribological applications is working under alternating high/low temperature conditions where the material is subjected to temperature fatigue mechanisms such as creep, softening due to annealing, and at the same time must withstand mechanical wear due to sliding contact with pairing bodies. Steam turbine valves, gate valves, va...
Journal of Machinery Manufacture and Reliability
Based on the mathematical model of a single-span turbine rotor featuring initial bending and residual imbalance, an estimate is made for the vibration amplitudes at the control points of the rotor span at speeds near the lowest critical values on the rundown. Two versions of rotor mounting on anisotropic foil bearings are considered, which simulate...
Heat and Mass Transfer
In this paper, the influence of incidence angle on the aerodynamics of the steam flow field around a rotor tip section is investigated. An Eulerian–Eulerian method, based on a non-equilibrium thermodynamics model for simulating the wet flow is employed. In this study, the effects of incidence angle on different design parameters such as: outflow Ma...
A variant of the combination of an NPP with a continually operating low-capacity additional steam turbine is proposed and analyzed. In the event of an accident with total blackout, the proposed setup makes it possible to supply electricity to first- and second-category consumers and circulation pumps. In addition, the residual heat released is used...
We present the results of comparative analysis of hydrogen versus other electrical energy storage systems.
Russian Metallurgy (Metally)
The structural changes that occur in the surface and surface layers of steel 20Kh13 and titanium alloy PT-3V (Russian designation) samples after each stage of hardening due to a formed mineral surface layer are studied by optical microscopy, transmission electron microscopy, and scanning electron microscopy. Electric spark alloying, pressing, and u...