Flame temperature field measuring device and method

A flame temperature and measurement device technology, applied in the fields of computational imaging and combustion diagnosis, can solve the problem of high cost of test devices, achieve the effects of eliminating out-of-sync shooting, simple test system, and suppression of artifacts

Inactive Publication Date: 2020-06-09
SHANGHAI JIAO TONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

In recent years, flame three-dimensional tomography has made great progress and has been widely used, but there are still many

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  • Flame temperature field measuring device and method
  • Flame temperature field measuring device and method
  • Flame temperature field measuring device and method

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Embodiment 1

[0050] like figure 1 As shown, this embodiment provides a flame temperature field measurement device, including a camera 1 , an endoscope 2 , a background plate 3 , a light source 4 , an optical filter 5 , an image processing device 6 , and a lens 7 . The background plate 3 and the endoscope 2 are arranged on a circle with a certain radius, and the nine incident end faces of the endoscope 2 face the background plate, each incident end is equipped with a lens 7 and focuses on the background plate 3 . The camera 1 focuses on the exit end surface of the endoscope 2 through the lens. The optical filter 5 is installed in front of the lens of the camera 1, and the image processing device 6 is connected with the camera 1 for receiving and processing the measured flame projection and reconstructing the three-dimensional field distribution of the flame. The camera 1, the optical filter 5, the image processing device 6, and the lens 7 constitute an image detection system. The camera o...

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Abstract

The invention relates to the technical field of flame three-dimensional detection and reconstruction. More specifically, the present invention provides a device and a method for measuring a flame temperature field based on a single-camera endoscopic background schlieren tomography technology. An imaging system combining a high-speed camera and an all-in-one endoscope is adopted, a background schlieren chromatography technology based on a refractive index gradient measurement principle is utilized, and the deflection angle of light passing through to-be-measured gas is obtained by shooting twopictures when to-be-measured flame exists and does not exist and combining an optical flow algorithm or a cross-correlation algorithm. And then a refractive index field of the flame is reconstructed through an algebraic iterative algorithm, the refractive index field is deduced to a density field in combination with a Gladstone-Dale formula, and the density field is deduced to a temperature fieldaccording to an ideal gas state equation. The device is simple, the test cost is low, and the reconstruction of a transient flame three-dimensional temperature field can be realized only by one high-speed camera.

Description

technical field [0001] The invention relates to the fields of computational imaging and combustion diagnosis, in particular to a device and method for measuring a flame temperature field. Background technique [0002] The combustion conditions in the combustion chamber of an aero-engine directly affect its performance and life. Combustion diagnosis is an important way to obtain flame combustion parameters. With the breakthrough of computer, laser and sensor technology, three-dimensional combustion diagnosis technology has been significantly developed. From the perspective of technical route, there are three main ways to realize flame 3D imaging technology. The first method adopts planar imaging technology, and the laser beam is projected to different heights of the flame through a rotating mirror to perform layer-by-layer scanning imaging. Since the technique can only image a small number of flame slices in the scan direction, the spatial resolution is low. Also, because t...

Claims

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Application Information

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IPC IPC(8): G01N31/12G01K11/00
CPCG01K11/006G01N31/12
Inventor 蔡伟伟刘何聪彭范
Owner SHANGHAI JIAO TONG UNIV
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