Aeroengine materials hot end environment experimental simulation method and device

Abstract

The invention discloses a hot end environment experimental-analogic method and device for a kind of aviation engine material. The invention carries on thermal shock simulation by using constant gas temperature to change the sample position, carries on accelerating simulation by using oxygen, water and salt water solution to change the gas composition. The invention combines the normal pressure subsonic velocity air tunnel and material performance testing machine, the invention uses the silicon nitride and silicon carbonate ceramic as the linings of the combustion chamber to upgrades the high temperature resisting level of the combustion chamber. The structure of sample bracket, rotary chain, and rotary handle can carry on hot shock simulation. There distributes with gas apertures and water apertures around the combustion chamber, it can upgrade the high oxygen partial pressure and the water partial pressure, it upgrades the melted salt partial pressure through salt dissolved in the water. The invention has a high simulating temperature, short time, and it is safe.

Description

technical field [0001] The invention relates to a simulation method and device for an aero-engine material hot-end environment experiment, in particular to using a subsonic subsonic high-temperature wind tunnel at atmospheric pressure combined with a material performance testing machine to carry out multi-factor coupling acceleration experiment simulation suitable for high-temperature gas environment conditions. It is mainly used for physical modeling of the environmental performance evolution of aerospace thermal structural materials such as superalloys and ceramic matrix composites, and can also be used for environmental performance testing of other thermal structural materials. Background technique [0002] At present, the known high-temperature wind tunnel is mainly used to simulate aero-engine components to determine the stress field and temperature field of the components, and provide a basis for the design and verification of the components. Although the theoretical l...

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Problems solved by technology

However, there are three problems in the assessment of components through test run or test flight: (1) The process of test run or test flight is complicated, involving a wide range of areas, and the cost is very expensive; (2) Because the influence of the complex real engine environment is not considered, the There is a great uncertainty in the actual life; (3) the damage mechanism cannot be determined after the abnormal failure of the component, and it is difficult to provide informa

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