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Zheng L.,Harbin Engineering University | Zheng L.,The 703 Research Institute of China Shipbuilding Industry Corporation | Zhao Y.,Harbin Engineering University | Sun B.,Harbin Engineering University | Qi H.,Harbin Engineering University
Huagong Xuebao/CIESC Journal | Year: 2015

Based on the actual operating process of the steam generator in Daya Bay Nuclear Power Plant, a transient simulation of load down from 100% to 50% operating condition was carried out by utilizing the CFD technologies to reveal the dynamic variation rule of steam generator heat-transfer characteristics in the load down process. The simulation results show that fluid thermal parameters of the primary and secondary sides decrease over time in the load down process. With the decrease of heat transfer intensity, the perturbation impact of tube support plates(TSPs) on steam quality, fluid velocity, and surface heat transfer coefficient in the secondary side decrease gradually. Corresponding to the operating condition of 100%, 70% and 50%, the fluid temperature of primary outlet is 297.2, 295.6 and 294.8℃ and the steam quality at the outlet of secondary outlet is 24.5%, 16.7% and 12.1%, respectively, which are in consistent with actual operating parameters of steam generator in Daya Bay Nuclear Power Plant. These results can provide theoretical support to the safe operation and optimization design of steam generator. © All Right Reserved. Source


Li D.,Harbin Engineering University | Ma Y.,Harbin Engineering University | Ma Y.,The 703 Research Institute of China Shipbuilding Industry Corporation | Liang C.,The 703 Research Institute of China Shipbuilding Industry Corporation | Niu X.,The 703 Research Institute of China Shipbuilding Industry Corporation
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | Year: 2011

To prove a turbine's initial design, evaluate the design result, and optimize the turbine's aerodynamic performance, three-dimensional (3-D) viscous multistage CFD analysis was conducted on a helium turbine of a high temperature gas-cooled reactor (HTGR-HT), employing a multi-grid and mixing the plane method between the rotor blade and guide vane. The 3-D analysis result shows that not only the overall parameters but also parameters between stage rows agreed well with the initial design, and perfect performance was achieved under different working condition by using an aft-load blade profile in the stator blade. Moreover, the 3-D calculation result indicates some disadvantages in the original design, thus giving reference for optimizing the blade profile to achieve even better helium turbine performance. Source


Dong H.,Wuhan Naval University of Engineering | Wen X.-Y.,The 703 Research Institute of China Shipbuilding Industry Corporation | Li M.-J.,The 703 Research Institute of China Shipbuilding Industry Corporation | He X.,Wuhan Naval University of Engineering
Hangkong Dongli Xuebao/Journal of Aerospace Power | Year: 2014

The wall temperature distribution of a can-annular reversed combustor flame tube was obtained and analyzed to ameliorate the flame tube design, since the flame tube was often ablated partly and cracked when a gas turbine running. The distributions of flow field, temperature field and wall temperature were obtained by the method of three-dimensional numerical simulation of coupled heat transfer, while heat conduction and radiation of solid, heat convection between gas and solid, radiation of flame and flue gas were took into account. The simulation result was checked by experiments, so the temperature distribution of flame tube can be predicted with the method of three-dimensional numerical simulation of coupled heat transfer. According to the simulation result, the wall temperature of combustor flame tube doesn't exceed the design value 1 223 K, but the temperature and temperature gradient are relatively high at several primary holes and the joint of the flame crossover tube and flame tube, and the cooling design of these parts needs to be improved. Source

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