Temperature-sensitive heat map test device for occluded areas for aerodynamic thermal tests of shock tunnel

Abstract

The invention discloses a temperature-sensitive heat map test device for occluded areas for aerodynamic thermal tests of a shock tunnel. The test device includes a model installed in the shock tunnel,an air rudder is fixed to the model, a gap is reserved between the model and the air rudder, at the position where the model corresponds to the air rudder, the surface of the air rudder is coated with a temperature-sensitive illuminating coating, the surface of the model is provided with an excitation light signal output probe and a temperature-sensitive fluorescent signal acquisition probe, theexcitation light signal output probe is connected with an excitation light source through an optical fiber, and the temperature-sensitive fluorescent signal acquisition probe is connected with an optical signal acquisition camera through an optical fiber. The temperature-sensitive heat map test device for the occluded areas for the aerodynamic thermal tests of the shock tunnel can realize the surface heat flow distribution measurement of the occluded areas in the aerodynamic thermal tests of the shock tunnel, the device is simple, easy to arrange and not limited by the size of the model, and the temperature-sensitive heat map test device and a test method thereof can be widely applied to the occluded areas of various gaps.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a temperature-sensitive heat map test device for a shielded area used for shock wave wind tunnel aerodynamic heat tests. Background technique [0002] In the hypersonic aerodynamic thermal environment test, the temperature-sensitive heat map test technology is used to obtain the heat flow distribution image on the surface of the model in a large area. Optical measurement technology for surface temperature and heat flow distribution measurement. This test technology requires spraying temperature-sensitive luminescent materials on the surface of the wind tunnel test model. During the wind tunnel test, a high-power exciting light source is used to illuminate the model, and an optical signal acquisition camera is used to collect and record the fluorescent signals emitted by the temperature-sensitive paint on the model surface. According to the pre-calibration d...

AI Technical Summary

Problems solved by technology

Generally speaking, the excitation light source and optical signal acquisition camera are arranged outside the optical observation window of the wind tunnel. Therefore, for the shielded areas such as the bottom gap, pit, and heat-proof tile gap of the test model, this method cannot be used to obtain the surface heat flow distribution.

At the same time, due to the high heat flow in these shaded areas, heat flow sensors are usually used to measure the heat flow in these shaded areas. , there is an urgent need to develop a temperature-sensitive heat map test device for the shielded area used in the shock tunnel aerothermal test

Images