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A Design Method of Axial Flow Turbine and Single Side Radial Exhaust/Gas System

An axial flow, turbine technology, applied in mechanical equipment, machine/engine, engine components, etc., can solve the problem of not considering the impact of exhaust/gas system on the safety of turbine blade operation, and reduce instability and failure. The probability of accidents, the improvement of thermal efficiency, the effect of reducing blade vibration

Active Publication Date: 2017-01-25
中科合肥中型燃气轮机研究院有限公司
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Problems solved by technology

However, in the existing flow design methods, the turbine and the exhaust system are usually regarded as two independent components, and the aerodynamic performance parameters of each component are regarded as independent design objectives, and the influence of the exhaust / gas system on the turbine blades is not considered. Impact on operational safety

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  • A Design Method of Axial Flow Turbine and Single Side Radial Exhaust/Gas System
  • A Design Method of Axial Flow Turbine and Single Side Radial Exhaust/Gas System
  • A Design Method of Axial Flow Turbine and Single Side Radial Exhaust/Gas System

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0020] The design method of the axial flow turbine and the unilateral radial exhaust / gas system of the present invention is based on the strong aerodynamic interaction between the turbine blade row and the unilateral radial exhaust / gas system and the impact of the coupled flow on the blade strength and Influence of life, a new design method is proposed. This design method puts forward design objectives from multiple levels of aerodynamics, structure, and life, and performs unsteady and accurate design of the axial flow turbine and the non-axisymmetric exhaust / gas system as a whole. In order to ensure that the turbine and the exhaust / gas system have a good diffusion capacity at the same time in the actual operating environ...

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Abstract

The invention discloses a method for designing axial-flow turbines and single-side radial exhaust steam / gas systems. The method comprises the following steps: step S1, obtaining the design of axial-flow turbines and exhaust steam / gas pressure expanders, and building an axial-flow turbine outlet flow field database; step S2, obtaining the primary design of the exhaust steam / gas systems by using the axial-flow turbine outlet flow field database, and obtaining a primary design scheme of the exhaust steam / gas systems by using non-constant coupled flow field analysis results of the turbines and the exhaust steam / gas systems; and step S3, carrying out flow-solid coupling analysis on the turbines under the influence of non-axisymmetrical non-constant flow fields of the exhaust steam / gas systems to obtain the flow-solid coupling design scheme of the axial-flow turbines and single-side radial exhaust steam / gas systems. The method can be used for designing the turbines and the exhaust steam / gas systems of all the single-side radial exhaust steam / gas axial-flow steam turbines / gas turbines.

Description

technical field [0001] The invention belongs to the technical field of turbines and exhaust steam / gas systems, and relates to a design method of an axial flow turbine and a single-side radial exhaust steam / gas system. Background technique [0002] The single-sided radial exhaust steam / gas system is often used in high-power condensing steam turbines and marine gas turbines, and is used to convert the residual velocity kinetic energy of the turbine outlet into pressure potential energy, and reduce the pressure under a given exhaust steam / gas system outlet pressure. The back pressure of the turbine increases the output of the turbine and improves the thermal efficiency of the unit. In the single-sided radial exhaust steam / gas system, due to the transformation of the turbine exhaust steam / gas from the axial direction to the radial direction, a non-axisymmetric flow field is generated at the turbine outlet section. The pressure pulsation of the turbine makes the turbine back pre...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/30F01D25/06
Inventor 付经伦刘建军周嗣京
Owner 中科合肥中型燃气轮机研究院有限公司
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