Multi-mode operating free piston shock tunnel

Abstract

The invention discloses a multi-mode operating free piston shock tunnel which comprises a tunnel body, a distributed vacuum system, an air supply system and a track supporting system, wherein the tunnel body comprises a driving mechanism, a shock tube section, a single-film capsule mechanism, a spray tube and a test tube section; the distributed vacuum system is capable of vacuumizing the drivingmechanism, the shock tube section and the test tube section; the air supply system supplies air to the driving mechanism and a shock tube section; and the tunnel body is sequentially and coaxially connected with the shock tube section, the single-film capsule mechanism, the spray tube and the test tube section in a sealed manner. By taking equipment of free piston high-enthalpy shock tunnel as thebasis, by virtue of rapid replacement, connection of various components and match of a three-use main capsule mechanism, the tunnel has test abilities of two states, namely a conventional a low-enthalpy shock tunnel and a long-term medium-enthalpy shock tunnel, the application range of the tunnel performance and the test ability are improved, and the operating cost is reduced.

Description

technical field [0001] The invention relates to a free piston shock wave wind tunnel operated in multiple modes, which is applied to hypersonic speed tests in various states. Background technique [0002] The deficiencies in the test equipment for research in the existing hypersonic field include propulsion test equipment for the test and evaluation of hypersonic and ultra-high-speed air-breathing vehicles, which require longer test time, high dynamic pressure, near-pure air, completely Reproduce enthalpy, larger size; long time, high dynamic pressure, high enthalpy test equipment for interceptor sensor and maneuver performance research. Trial time is very important to the capabilities of new equipment. All current demands on hypersonic technology and its applications are primarily to reduce costs while improving safety and reliability. [0003] The diversity of equipment in hypersonic testing can be attributed to the large range of flight conditions and unique phenomena t...

AI Technical Summary

Problems solved by technology

[0004] Existing technologies include free-piston high-enthalpy shock tunnel model and conventional shock tunnel model. Usually, one wind tunnel only implements one model. When the same test requires different test states, the model needs to be in different Repeated installation between wind tunnels requires the use of different nozzles, which will inevitably introduce errors and affect the accuracy of test results and test efficiency; at the same time, because multiple wind tunnels need to be built, both construction and operation costs very high

[0005] The running time of the existing free piston shock wave wind tunnel is relatively short, which cannot meet the needs of some hypersonic force measurement and special tests

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