Long-time high-temperature fuel gas wind tunnel variable attack angle motion device

Abstract

The invention discloses a long-time high-temperature fuel gas wind tunnel variable attack angle motion device, which effectively solves the problem of design of a variable attack angle mechanism with high reliability, large attack angle change range, high precision and high bearing load in a long-time, high-temperature and large-heat-flow severe heat environment during a large-scale fuel gas flow wind tunnel test through reasonable layout of a heat protection scheme. The device mainly comprises a bottom bracket, a pitching platform, a hydraulic oil cylinder and an electric control system, through the unique box type frame bottom bracket and the two-end force bearing and bottom auxiliary pitching platform structure, the requirement for the high force bearing characteristic under the aircraft model test condition is met, reliable locking of the hydraulic oil cylinder at any position within the range of 0-30 degrees can be achieved, and the reliability of the device is improved. The control system can supply oil to the double-power cylinder and the auxiliary cylinder to drive the luffing operation of the pitching platform, and the stability of the system is improved.

Description

technical field [0001] The invention relates to a long-time high-temperature gas-fired wind tunnel variable attack angle movement device, which belongs to the field of wind tunnel test design. Background technique [0002] The high-temperature gas flow supersonic thermal structure wind tunnel is mainly used to simulate the aerothermal and aerodynamic performance of aircraft at a certain altitude. The 200MW gas flow wind tunnel is the only one in China that can carry out thermal insulation simulation experiments at the level of 100 megawatts and thousands of seconds, and conduct thermal structure, thermal matching, and thermal sealing test assessments of thermal protection system section-level structures as a whole or local 1:1 thermal protection schemes , to provide technical support for the ground test verification of the heat protection system scheme of the new generation weapon system. [0003] In order to better simulate the flight environment during the thermal assessm...

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