Environmental simulation calibration wind tunnel of annular loop

Abstract

The invention relates to an environmental simulation calibration wind tunnel of an annular loop. The environmental simulation calibration wind tunnel of the annular loop is formed by a connection section, a power section, a refrigeration section, a heating section, a vacuum control section, a large cornering section, a rectification section, a contraction section, a replaceable test section, a diffusion section and a small cornering section which are sequentially connected. A draught fan is arranged or connected inside the power section, an evaporator or a heater is arranged inside the refrigeration section or the heating section, and a vacuum control system is arranged outside the vacuum control section. The outer wall of the contraction section is connected between the rectification section and the replaceable test section, the contraction ratio of the rectification section to the replaceable test section is 5-8 to 1, and the external diameters of the replaceable test section are the same in the length direction. The external diameter of the end, close to the replaceable test section, of the diffusion section is smaller than the external diameter of the end, close to the small cornering section, of the diffusion section. The environmental simulation calibration wind tunnel of the annular loop can be calibrated under the condition that the operating temperature, pressure and wind speed of an atmosphere device are simulated and detected.

Description

technical field [0001] The invention relates to a wind tunnel, in particular to a circular circuit environment simulation calibration wind tunnel, which is used for calibrating and detecting devices for atmosphere and particles under different pressure, wind speed and temperature environments. Background technique [0002] At present, pitot tubes are usually used to calibrate the total pressure, static pressure and other parameters of the atmospheric detection device, and the current calibration of the atmospheric detection device is carried out at normal temperature, normal pressure and wind speed, which will be different from the actual operating conditions of the atmospheric detection device There is a large gap, so there is a special need for a device that simulates the actual operating environment of the atmospheric device. Contents of the invention [0003] The purpose of the invention of the present application is to overcome the existing shortcoming that the calibr...

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Problems solved by technology

[0003] The purpose of the invention of this application is to overcome the existing shortcomings of not being able to calibrate under the operating environment of the atmospheric detection device, and to provide a circular loop environment simulation calibration wind tunnel

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