Keywords: Military Engineering Institute, "Reciprocation Engines and Power Plants" department, jubilee scientific and technical conference, R and D works, achievements, revival of scholar schools.

Scientific and technical conference «Performance of power plants owned by RF army: current status and improvement prospects», was held on the occasion of the 7 5th anniversary of «Reciprocation engines and power plants» department of military institute of railway armies and military transport of military academy of logistics and transport named after general A.V. Khrulev. Scope of papers presented included the review of most important R and D works and achievements of the departmental scientists, proposals on ways of revival and further development of scholar schools related to military power plants' performance.

Keywords: reciprocating engines, fuel spray, multizonal model, heat release, modelling of noxious substance release kinetics.

The article presents principal ways of improvement of DIESEL-RK code developed by Bauman Moscow State University for modelling of combustion process and noxious substance release kinetics. Improvements of conventional model of mixing mainly relate to analysis of fuel evaporation and heat release rates in characteristic zones of multizonal model, taking account of fuel jets interference inside the combustion chamber.

Keywords: reciprocating engines, turbocharging, axial flow action turbine, no-separation flow, critical incidence angle.

Presented is newly-developed and test-verified method for calculation of flow separation losses at the entrance of exhaust gas to action turbine wheel blade row. The method enables calculation of critical incidence angles that secure no-separation character of gas flow at the inlet of turbine wheel blade row. Separation-related losses are calculated for vehicle engine turbochargers types TCR-8,5, TCR-11 and TCR-14.

Keywords: reciprocating engine, two-stage supercharge system, reduction in noxious emissions, controllable wastegate and air bypass systems, exhaust gas recirculation.

The article presents review and analysis of today trends in two-stage supercharge systems (TSSS) of two- and four-stroke multi-purpose engines. It is shown that TSSS systems for 4-stroke medium-speed engines produced by industry-leading engine builders, though varying in design, are able to simultaneously improve fuel efficiency and reduce noxious emissions to limits established by applicable oncoming regulations (continuation of review).

Keywords: turbocharger, rotor system, plain bearing, rotor vibration damping, modelling of system dynamics in various coordinate systems.

Considered are methods and applied aspects of rotor dynamics modelling for turbochargers featuring plain bearings. Included are the results of numerical analysis and optimization of a serial turbocharger rotor system. These authors took part in designing of plain bearings that damp rotor vibrations at high rotational speed. Recommendation are formulated on statement and solution of rotor dynamics problems. Simplified description of rotor in fixed coordinate system is shown as yielding most trustworthy calculation results, while rotating coordinate system is preferable for modal analysis of rotor system dynamics.

Keywords: KAMAZ engines, maintainability, crankcase ventilation system, oil spit, cylinder liner–engine blockinterface, nonoptimal thermal stress pattern.

Oil spit through the breather was revealed as a typical defect of KAMAZ type 740.354-450 engine. This work is targeted at rectifying of said defect in order to improve engine maintainability. It is nonoptimal thermal stress pattern of piston-cylinder unit parts that had been identified as a cause of such condition, the previous, in turn, resulting from excessive interference fit of cylinder liner upper land. Measures are offered to eliminate said defect.

Keywords: Marine engines, emission control areas, low-sulfur fuels, oil thickeners, new cylinder oils, field test results.

New trends in the development of engine lubricants largely relate to severe decrease in maximum allowable sulfur content in marine fuel for ships operating within emission control areas (ECA). Chevron Oronite Company has developed alternative oil thickeners for engine operation on lower than 0,1 % m/m fuel sulfur. According to MAN BW, alkaline additives are no more recommendable for engine operation on low-sulfur fuels, liquefied natural gas (LNG) and liquefied petrol gas (LPG), since they can disturb the lube oil film, obstruct the piston ring movement, polish the liner surface and thereby increase the risk of scuffing. The results of bench and field tests of newly-developed cylinder oils are presented. The CIMAC papers are translated into Russian by G.Melnik, PhD.