Nozzle structure with azimuth angle for radial direction pre-swirling system

Abstract

The invention discloses a nozzle structure with an azimuth angle for a radial direction pre-swirling system. The nozzle structure with an azimuth angle is used in an aircraft engine and a ground combustion gas turbine radial direction pre-swirling system. The azimuth angle of the nozzle is controlled by two angles of [theta] and [alpha], wherein, the [theta] is a pre-swirling angle of the nozzle,and the [alpha] is a deflection angle of a nozzle axis in the axial direction. The nozzle structure with the azimuth angle for the radial direction pre-swirling system is widely used in the cooling system of high temperature components of a gas turbine, the nozzle structure with the azimuth angle for the radial direction pre-swirling system has the beneficial effects that the deflection angle of airflow in a disk cavity is reduced, the circulation effect of the airflow is improved, greater cooling flow can be obtained under the same inlet and outlet pressure, the cooling air quality at an inlet of a turbine blade is improved, and the temperature level of hot end parts such as a turbine disc and the turbine blade is effectively alleviated.

Description

technical field [0001] The invention relates to the technical field of radial pre-swirling cooling in the air system of rotating turbomachinery (aero-engine and ground gas turbine, etc.), and relates to an azimuth nozzle structure for a radial cold air pre-swirling system. Background technique [0002] In recent years, with the continuous improvement of cycle parameters such as aero-engine thrust-to-weight ratio and ground gas turbine pressure ratio, especially the increase in gas temperature before the turbine, the thermal load of hot-end components such as turbine disks and turbine blades has increased sharply, and their lifespan has increased dramatically. In order to alleviate this problem, foreign researchers have proposed a new cold air intake method of pre-swirling intake. The pre-swirling nozzle is an important component of the pre-swirling system. Its function is to provide cooling gas to cool the turbine disk and turbine blades of the engine and gas turbine, and to...

AI Technical Summary

Problems solved by technology

At present, researchers have carried out a variety of structural designs on the nozzles of the radial pre-swirl system, mainly including straight hole, tapered, cascade and pneumatic hole nozzles. The direction of air blowing toward the low radius, but this air intake method has the disadvantage of large pressure loss. When the air flow reaches the vicinity of the air supply deflector, it will deflect nearly 90° to adapt to the change of the flow path. The process of this process The fluidity of the cooling air flow is poor, resulting in insufficient air supply flow to hot-end components such as turbine blades, which affects their life and work stability

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