Method for designing low-working-condition rotatable guide vane corner rule of axial flow compressor of ship gas turbine

Abstract

The invention aims to provide a method for designing a low-working-condition rotatable guide vane corner rule of an axial flow compressor of a ship gas turbine, which comprises the following steps: extracting pneumatic parameters at the characteristic section positions of movable vanes in the adjacent rows of rotatable guide vanes of each column of the compressor, decompressing the low-working-condition reduced rotation speed and the design point reduced rotation speed of the compressor, and calculating the circumferential speed of the movable vanes; setting a reduced flow value, and calculating the axial speed of an inlet of each column of moving vanes; and giving an expected inlet attack angle of the next-stage moving vane, obtaining an inlet relative airflow angle of the next-stage moving vane after each column of rotatable guide vanes rotate, solving a rotating angle of each column of rotatable guide vanes, and obtaining a rotating angle rule of the rotatable guide vanes of the gascompressor at different folding rotating speeds. By means of the invention, the ideal multi-column rotatable guide vane combined regulation and control corner rule can be rapidly obtained, resource and time consumption in the design process is effectively reduced, the workload of designers is reduced, the surge margin index of the air compressor under the low working condition can be effectivelyimproved, and the invention is very suitable for engineering design application.

Description

Technical field [0001] The present invention relates to a gas turbine design method, specifically a ship gas turbine compressor design method. Background technique [0002] The compressor is one of the three most important core components of the ship gas turbine, and its technical performance and reliability directly affect the safety and economic indicators of the ship gas turbine. In order to adapt to the technical requirements of the ship navigation process, the ship gas turbine should be particularly emphasized in the high-efficiency operation under low operating conditions while ensuring design point performance. The operating characteristics of this large-range variable condition makes the gas turbine are very highlighted as a low-conditionable stability problem when the ship's power system is advanced or generated, and often becoming the performance of the unit performance, which is the ship gas turbine compressor. The performance and stability under non-design conditions ...

AI Technical Summary

Problems solved by technology

At the same time, with the gradual increase in the number of transducible lobe rows and the increasingly flexible control methods of transducible lobe, the number of angle combination schemes between multi-row transducible lobes has increased sharply, which gives the compressor multi-row transducible lobe The design of joint regulation and rotation angle law brings more difficulties and challenges

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