Method for solving geometric throat area of turbine guide vane

Abstract

The invention belongs to the field of aviation turbine guiders, and particularly relates to a solving method for the geometric throat area of a turbine guide blade. The method comprises the steps: 1,constructing m spline curves based on a blade upper edge plate runner line and a blade lower edge plate runner line; 2, based on the blade upper edge plate runner line, the blade lower edge plate runner line and the m spline curves, constructing m + 2 revolution surfaces; 3, obtaining intersection lines of the m + 2 revolution surfaces and the blade body of the rear-view left blade; 4, defining the position of a point on the intersection line through a U-direction parameter; 5, constructing geometric throat curved surfaces of a group of guide blades, and defining the geometric throat area as S; 6, solving the geometric throat area S through a Global Simplex algorithm. According to the solving method for the geometric throat area of the turbine guide blade, the influence of the blade profile, the flow channel, the blade body surface, the upper edge plate and the lower edge plate on the geometric throat area of the blade grid is considered, the integration is high, and the geometric throat area of the turbine guide blade grid can be obtained more accurately.

Description

technical field [0001] The application belongs to the field of aviation turbine guides, in particular to a method for solving the geometry throat area of ​​turbine guide vanes. Background technique [0002] The exhaust area of ​​the turbine guide is very important to the performance of the whole engine. Among them, the high-pressure turbine guide is the throat of the engine, and its area directly affects the performance indicators such as the flow rate and thrust of the engine; The engine slip and the temperature after the turbine have a great influence, so the exhaust area of ​​the guide must be accurately measured and adjusted. [0003] In the prior art, for the measurement of the geometric throat area of ​​the turbine guide vane cascade, the commonly used solution is to approximate the window to be measured as a trapezoid, calculate the area of ​​a single window, and then add it up to obtain the geometric throat area of ​​the entire guide vane cascade . This method only...

AI Technical Summary

Problems solved by technology

This method only considers the influence of the blade shape (width) on the geometric throat area of ​​the cascade, but ignores the influence of the flow path change (height) on the geometric throat area, especially when the curvature of the flow path along the axial direction changes sharply When the traditional technical scheme is used, the deviation of the calculation of the geometric throat area is more obvious; the traditional calculation method does not consider the influence of the surface of the blade body and the rounding of the upper and lower edge plates on the geometric throat area of ​​the cascade. The larger the rounding radius, The larger the proportion of the rounded part to the geometric throat area of ​​the cascade, the more obvious the deviation in calculating the geometric throat area using traditional technical solutions

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