Development of highly loaded rotating blade for steam turbines

摘要

Turbine manufacturers have been concerned about efficient utilization of limited energy resources and prevention of environmental pollution. For steam turbine power plants, a higher efficiency gain is necessary to reduce the fuel consumption rate. Blade configurations have been studied for reductions of profile loss and endwall loss that lead to decreased steam turbine internal efficiency, by applying recent aerodynamic technologies based on advanced numerical analysis methods. This paper discusses reduction of rotating blade numbers by 14% and increased blade aerodynamic loading without deterioration of performance. A new rotating blade is found which improves blade performance, especially at the root section where the reduction in the energy loss coefficient is about 40%. This rotating blade also provides a lower manufacturing cost.