Experimental use multi-row pressure testing rake device

Abstract

The invention discloses an experimental use multi-row pressure testing rake device arranged on the surface of a to-be-tested model and comprising a plurality of single-row pressure testing rakes witha rectification effect; the single-row pressure testing rakes are distributed and mounted on the areas of the surface of the to-be-tested model, wherein said areas are same in boundary layer speed distribution; the adjacent single-row pressure testing rakes are distributed on the surface of the to-be-tested model in a spanwise manner; the single-row pressure testing rake comprises a total pressuretube bank formed by breather pipes in a row; isolation blocks are arranged between the total pressure tube bank and the to-be-tested model, and the heights of the isolation blocks are arranged in a graded distribution along with the single-row pressure testing rake distribution. Compared with a conventional pressure testing rake experiment device, the effective measuring point interval is smaller, thus obtaining more test data in a unit length, and effectively improving the spatial resolution in the boundary layer measurement; the experimental use multi-row pressure testing rake device can reduce the interferences caused by the single-row pressure testing rake geometry profile on the flow field, and thus providing more accurate test data.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics experiment testing devices, and in particular relates to a multi-row pressure measuring rake device for experiments. Background technique [0002] When a fluid such as air or water flows over the surface of an object, there is always a thin layer of uneven velocity distribution near the surface of the object, which is called the boundary layer. In the region inside the boundary layer, the fluid viscosity plays a dominant role, and in the region outside the boundary layer, the influence of fluid viscosity is weak. The research results show that the velocity distribution of the flow field area inside the boundary layer has an important impact on the entire space flow field, and is related to the optimization of the layout scheme of the buried weapon bay, the aircraft inlet, etc., and the improvement of equipment performance. Therefore, the velocity distribution of the boundary layer area Ve...

AI Technical Summary

Problems solved by technology

[0004] There are three main deficiencies in the traditional pressure measurement rake experimental device. First, due to the thickness of the pipe wall of the ventilation pipe, the outer diameter of the ventilation pipe is larger than its inner diameter, so the minimum interval between adjacent ventilation pipes is the outer diameter of the circular pipe, which leads to The spatial resolution of the velocity distribution in the boundary layer area measured by the rake is limited by the outer diameter of the circular tube; second, the distance between the air tubes of the traditional pressure measurement rake cannot be obtained, otherwise the air tubes will interfere with each other's test data, further limiting the test The improvement of the spatial resolution of the data, and the third is that the rectangular windward surface of the traditional pressure rake interferes with the flow field, which affects the accuracy of the test data of the pressure rake

Therefore, the traditional pressure rake experimental device limits the improvement of the spatial resolution of the velocity distribution of the boundary layer, and also limits the application of the pressure rake experimental device in the layout optimization design of buried weapon bays, aircraft inlets and other equipment.

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