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Многорежимная оптимизация последней ступени ЦНД паровой турбины
(НТУ "ХПИ", 2010) Яковлев, В. А.; Ершов, Сергей Владимирович
The example of multipoint aerodynamic optimization of low pressure cylinder last stage of the steam turbine by capacity of 200 MW is considered. The weighed stage efficiency for four operating conditions of the turbine is chosen as objective function. The technology of computational investigations is based on the use of 3D flow numerical models for turbomachinery flowpaths. Searching an objective function extremum was carried out byhybridapproach, combining genetic algorithmwith localdirectsearchmethod
Низкорейнольдсовая модель турбулентности с ограничителем производства кинетической энергии
(НТУ "ХПИ", 2010) Ершов, Сергей Владимирович; Деревянко, А. И.
The Low–Reynolds turbulence model with the kinetic energy production limiter is considered. The laminar-turbulent transition method is implemented in the solver FlowER-Y on the base of the k–ω SST model. The results of the calculations were compared with experimental data from ERCOFTAC database for gas flow along a flat plate. It is shown that the low-Reynolds modification of the k–ω SST model allows an approximate simulation of a transitional flow