Flow field calibration apparatus

Abstract

Provided in the invention is a flow field calibration apparatus comprising a mounting frame, a support frame, a measuring mechanism and a driving mechanism. The mounting frame is fixed at an upper side wall and a lower side wall of a sprayer nozzle outlet of a test cabin by bolts. The support frame consists of an upper inclined support unit and a lower inclined support unit; the upper inclined support unit and the lower inclined support unit are respectively provided with mounting inclined surfaces for installing the measuring mechanism and are respectively fixed right above and below the sprayer nozzle by the mounting frame, wherein the mounting inclined surfaces of the upper inclined support unit and the lower inclined support unit are respectively parallel to the axis of the sprayer nozzle. Bolt holes that are arranged in rows are respectively formed in the upper inclined support unit and the lower inclined support unit; and bolt holes that are arranged in multiple rows and correspond to each other are formed in the walls of the upper inclined support unit and the lower inclined support unit along the axis direction of the sprayer nozzle. The measuring mechanism includes a measuring frame, a measuring rake group, and an adapter piece; the measuring frame is installed at the support frame; and the measuring rake group is installed at the measuring frame. The driving mechanism is installed at the measuring mechanism, so that the measuring rake group can be driven to make linear motion at the measuring frame.

Description

technical field [0001] The invention relates to a flow field calibration and measurement device, in particular to a flow field calibration and measurement device used for a high-altitude simulation test vehicle platform. Background technique [0002] In order to determine the high-altitude characteristics of solid rocket motors, it is necessary to conduct experimental verification on a high-altitude simulation test bench. Before the simulation test, it is necessary to calibrate the flow field of the test bench. By measuring the temperature, dynamic pressure and static pressure in the flow field, we can understand the flow field quality of the test bench and provide help for the processing of subsequent test data. . [0003] Flow field calibration generally uses translational or swinging methods to measure the temperature and pressure of the nozzle outlet airflow. The translational measurement method is to place both the measuring mechanism and the driving mechanism in the ...

AI Technical Summary

Problems solved by technology

If the swing measurement method is used, although the driving mechanism can be placed outside the flow field and can meet the requirements of the operating temperature under the condition of protection, the outlet diameter of the nozzle is 1.4m. Under the influence of impact load and thermal expansion of the measurement rake, The fixed structure of the swing end of the measuring device is difficult to solve

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