A high-temperature vacuum wind tunnel test chamber and diffuser integral structure with sliding thermal compensation function and sliding thermal compensation method

Abstract

The invention relates to a high temperature vacuum wind tunnel test cabin with the sliding thermal compensation function, a diffuser integral structure and a sliding thermal compensation method, solves disadvantages in the prior art, provides a thermal compensation scheme of a high temperature wind tunnel diffuser and solves a problem of thermal compensation difficulty of a large-scale gas flow wind tunnel test cabin under long-time, high temperature and large thermal flow bad thermal environments. A structure design of the diffuser of which the middle segment is fixed and supported and two ends are in a sliding mode is employed, and thermal expansion is reasonably distributed. According to the different thermal environments, different thermal compensation modes are employed at different positions. For the upstream, the contact area between a cabin body and the diffuser is enhanced through adding a conic sleeve, multi-channel sealing is employed to eliminate being-burnt and sealing failure risks, an upstream end of the diffuser, namely a collection port, is a free end, and sliding thermal compensation is realized; for the downstream, after a water spraying temperature reduction device is employed to reduce the gas temperature, an expansion knot thermal compensation method is employed, and sliding thermal compensation is realized.

Description

technical field [0001] The invention relates to a high-temperature vacuum wind tunnel test chamber with a sliding thermal compensation function, an overall structure of a diffuser and a sliding thermal compensation method, that is, a structure and a sliding thermal compensation method for a high-temperature vacuum wind tunnel with sliding thermal compensation, belonging to The field of wind tunnel technology. Background technique [0002] The high-temperature gas flow wind tunnel is an important ground test equipment for simulating the thermal performance of materials and aircraft in high-temperature airflow. The test cabin and diffuser are the main components of the wind tunnel. The pressure regulator is mainly used to increase the static pressure of the air flow to facilitate the discharge air flow. Compared with other wind tunnels, the high-temperature wind tunnel has the characteristics of large heat flow and long test time. In the gas flow wind tunnel, the thermal env...

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Problems solved by technology

It solves the problem of thermal compensation of the diffuser in a high-temperature vacuum environment, with a simpler structure, strong adaptability to harsh high-temperature thermal environments, and no problem of thermal stress concentration

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