Burlaka M. Axial turbines guide blade rim aerodynamic optimization

Object of research: the aerodynamic phenomena in blade rims of high pressure axial turbines. A research objective - a substantiation of authentic and effective algorithm of axial turbines guide blade rims complex tangential lean aerodynamic optimization with use of methods of CFD and control of the mass flow rate by optimization. Research methods: Theoretical aspects of work are based on fundamental positions of the theory of aerohydrodynamics. Solid-state three-dimensional computer modeling was used for construction of computer three-dimensional models of axial turbine blades. CFD methods were applied to reception of characteristics of a stream in axial turbine blades. Aerodynamically optimum form of turbine blades was defined by means of design of experiment methods. Theoretical and practical results: Algorithm of aerodynamic optimization of axial turbine guide blades and the recommendation concerning use of complex tangential lean. Scientific novelty: has had the further development the approach to optimization of guide turbine blades which unites the theory of design of experiment and methods of calculations of a flow and provides both split-hair accuracy of calculations, and essential reduction of time of optimum designing; for the first time the algorithm of guide blades complex tangential lean aerodynamic optimization together with their turn that has allowed to receive effective guide blades is developed and with the set accuracy to keep size of the mass flow rate new parametrical models of a spatial blade of the axial turbine are offered: one with a shovel curvature on all length, the second with the rectilinear central site, which basic difference is high flexibility at the minimum quantity of the varied parameters; Recommendations concerning a choice of a method of a curvature of shovels are developed by optimization of turbine blade rims with the different relation of a throat to their height; for the first time for a guide blade rim with shovels constant on height of standard profile Н4 (ТС-1А) in the set range of heights the greatest possible prize in factor of total losses from use complex tangential lean is defined at exact preservation of the mass flow rate through a blade passage. Introduction degree: Results of dissertational work are used by Public Corporation "Turboatom" in the course of designing of new steam turbines. Use sphere: turbine construction area.