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A real-time oil flow display method for a three-dimensional inwardly rotating inlet port with a waverider precursor

A technology of inwardly rotating inlet and waverider precursor, which is applied in the field of super/hypersonic flow field structure display and super/hypersonic complex three-dimensional inlet near-wall flow display, which can solve the flow field change inlet Problems such as the display of complex flow field structures near the wall, to reduce external light interference, improve adaptability, and simple calibration methods

Active Publication Date: 2021-08-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Purpose of the invention: The present invention provides a real-time oil flow display method suitable for three-dimensional inwardly rotating inlets, which solves the adverse effects of flow field changes during the closing process of the wind tunnel and the difficulty in displaying the complex flow field structure near the wall of this type of inlet

Method used

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  • A real-time oil flow display method for a three-dimensional inwardly rotating inlet port with a waverider precursor
  • A real-time oil flow display method for a three-dimensional inwardly rotating inlet port with a waverider precursor
  • A real-time oil flow display method for a three-dimensional inwardly rotating inlet port with a waverider precursor

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Embodiment Construction

[0024] see figure 1 , figure 2 , which is related to the implementation of the real-time oil flow display test of the internally rotating inlet with waveriding front in the present invention. The principle, structure and specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] refer to figure 1 , this test was carried out on the Supersonic Inlet Mechanism Testing Platform (SIMTP) of Nanjing University of Aeronautics and Astronautics. The wind tunnel is an air-breathing free-jet wind tunnel, including air inlet 31, butterfly valve 32, rectification section 33, Laval nozzle 34, test chamber 35, top observation window 36, side observation windows 37, and model installation platform 38 , diffuser 39, gate valve 40, vacuum spherical tank 41, optical observation windows are installed on both sides and top of the test section. The total parameters of incoming flow are local atmospheric envi...

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Abstract

The invention provides a method for displaying real-time oil flow in an internally rotating inlet channel with a wave-riding front, which includes oil preparation, oil brushing, a closed test chamber, a light source, real-time shooting, and the like. The preparation of the oil agent adopts titanium dioxide, silicone oil and oleic acid, wherein oleic acid is used to adjust the viscosity of the oil agent; the brushing of the oil agent is to brush different oil agents on different surfaces of the model according to the wall shear force. The scheme is beneficial to weaken the accumulation of oil agent, accelerate the development of the oil flow map, and the oil flow streak trace is clear; the real-time oil flow test technical scheme provided by the invention can obtain the high The quality map avoids the adverse effects of flow field changes during the closure of the wind tunnel, and can provide a technical solution for the complex flow analysis of this type of inlet. The invention also provides the technical proposal of the oil used in the display method.

Description

technical field [0001] The invention belongs to the field of super / hypersonic flow field structure display, in particular to the field of super / hypersonic complex three-dimensional flow display near the wall of an air inlet. Background technique [0002] The internal rotation inlet is a form of hypersonic inlet with unique advantages. It has the advantages of short axial distance, small wetting area, good flow capture characteristics, and is conducive to the integrated design with the waverider precursor. In recent years, it has been widely concerned by scholars from all over the world. [0003] The wave system structure of the inward turning inlet is complex, and the three-dimensional characteristics of the shock wave / boundary layer interference are strong, resulting in a complex flow field structure. Compared with other types of inlet flow fields, it has stronger three-dimensional characteristics. The strong three-dimensional flow The characteristics have a great influenc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/06
CPCG01M9/067
Inventor 王卫星李宥晨罗龙康谭慧俊张仁涛
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS