Turbine blade film hole simulated thin-wall pipe quasi-service-environment performance testing device

Abstract

The invention discloses a turbine blade film hole simulated thin-wall pipe quasi-service-environment performance testing device. The device is characterized in that an air cooling hollow turbine bladesimulated film hole thin-wall pipe sample is adopted as an object and internally filled with cooling air, a fuel gas environment box and a mechanical performance testing device are allocated externally, an aero-engine hollow turbine blade quasi-service environment is simulated under the joint action of air cooling and high-temperature fuel gas control systems, and by connection with a mechanicalperformance testing system, testing of various mechanical performances including stretching, fatigue, durability / creepage and the like of the film hole thin-wall pipe sample in the quasi-service environment can be realized.

Description

technical field [0001] The invention relates to a device for testing the near-service environment performance of a thin-walled pipe fitting for simulating the gas film hole of a turbine blade, belonging to the technical field of testing. Background technique [0002] An aero engine is a power device that converts the heat energy released by fuel combustion into mechanical energy. It is both a heat engine and a propeller. The turbine component is an important part of the core machine of the aero-engine. It is installed behind the combustion chamber and is a load-bearing component that rotates under the action of high-temperature gas. As we all know, increasing the gas temperature before the turbine is an effective measure to improve engine performance, but increasing the gas temperature before the turbine is limited by the material properties and structural strength of the turbine components. In order to solve this problem, the turbine blades must be effectively cooled, and ...

AI Technical Summary

Problems solved by technology

Therefore, the test of mechanical properties of materials under conventional simple high-temperature conditions cannot accurately reflect the true strength and life of turbine blade materials.

Because the existing conventional test equipment can only simulate the uniform temperature conditions of the turbine blade material under high temperature conditions, it cannot provide the actual turbine blade material with external high-temperature gas and internal cooling air, let alone simulate the near-service working environment with a temperature gradient. The direct and reliable approach is to design and develop test equipment that can simulate the interaction of internal air cooling, external high-temperature gas and loads based on the typical service conditions of turbine blades, and aim at the air film holes that can represent key structural features of turbine blades. The mechanical performance test of thin-walled pipe fittings in the near-service environment has very important scientific research and engineering application significance for the strength calculation, life prediction and reliability assessment of air-cooled hollow turbine blades of aero-engines

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