Aero-engine high-speed rotating disk bolt drag reduction design method and rotating disk

Abstract

The invention discloses an aero-engine high-speed rotating disk bolt drag reduction optimization method. The optimization method comprises the following steps: determining the diameter and position ofa reference circle and a circle where a leading edge or a trailing edge arc is located; drawing a plurality of outer contours of the bolt cover according to a circle where the leading edge or the trailing edge arc is located; obtaining resistance coefficients of different outer contours, and obtaining resistance coefficients of the bolts, and obtaining optimization direction of outer contour design of the bolt cover by comparing resistance coefficients of different outer contours with resistance coefficients of the bolts. The bolt cover obtained by the bolt drag reduction optimization methodof the high-speed rotating disk of the aero engine provided by the embodiment of the invention can solve the problem of bolt drag reduction under high-speed rotation. The invention can reduce the flowresistance and the temperature rise of the wind resistance, thereby effectively slowing down the rise of the air flow and the solid temperature in the rotor disk cavity area near the bolt and downstream, and prolonging the service life of the rotating disk.

Description

technical field [0001] The invention relates to the technical field of aero-engines, and in particular relates to a design method for drag reduction of high-speed rotating disk bolts of an aero-engine. Background technique [0002] As the rotational speed of the aeroengine rotating disk increases, the temperature rise caused by the wind resistance of the bolts on the rotating disk, especially at the high-radius position, becomes higher and higher, which makes the airflow and solid temperature in the vicinity of the bolts and in the downstream rotor disk cavity area increase, and even It will deteriorate the strength performance of the material, which is not conducive to its lasting life. In the prior art, the bolts used on the rotating disk of the aero-engine are generally standard parts without any streamline design, and the bolts are directly exposed to the airflow in the disk cavity, which leads to a very large flow resistance and a very high temperature rise due to wind ...

AI Technical Summary

Problems solved by technology

[0002] With the increase of the rotational speed of the aeroengine rotating disk, the temperature rise caused by the wind resistance of the bolts on the rotating disk, especially at the high-radius position, is getting higher and higher, which makes the airflow and solid temperature in the vicinity of the bolts and the downstream rotor disk cavity area increase, and even It will deteriorate the strength performance of the material, which is not conducive to its long-term life

In the prior art, the bolts used on the rotating disk of the aero-engine are generally standard parts without any streamline design, and the bolts are directly exposed to the airflow in the disk cavity, which leads to a very large flow resistance and a very high temperature rise due to wind resistance

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