A high temporal and spatial resolution full-field heat release rate measurement method and system

A technology of time-space resolution and heat release rate, which is applied in the field of optical measurement, can solve the problems that the heat release rate cannot be solved separately, and achieve the effect of alleviating the insufficient resolution of heat release rate measurement and accurate measurement results

Active Publication Date: 2022-07-01
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the unknown local sound velocity, this method can only solve the law of relative amplitude variation, and cannot solve the heat release rate alone

Method used

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  • A high temporal and spatial resolution full-field heat release rate measurement method and system
  • A high temporal and spatial resolution full-field heat release rate measurement method and system
  • A high temporal and spatial resolution full-field heat release rate measurement method and system

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Embodiment 1

[0023] figure 1 This is a flow chart of a method for measuring a full-field heat release rate with high temporal and spatial resolution provided by an embodiment of the present invention, and the method is applied to a measuring device provided by an embodiment of the present invention. specific, figure 2 is a schematic diagram of a measurement device provided according to an embodiment of the present invention, such as figure 2 As shown, the device includes: an illumination light source 10 , a background pattern 20 and an imaging device 40 . Optionally, as figure 2 As shown, the measuring device also includes an image sensor 50 and a processing device 60 .

[0024] The illumination light source 10 , the background pattern 20 , the imaging device 40 and the image sensor 50 are sequentially arranged on the same straight line; the flame 30 to be measured is arranged between the background pattern 20 and the imaging device 40 .

[0025] Optionally, in this embodiment of th...

Embodiment 2

[0062] image 3 It is a schematic diagram of a full-field heat release rate measurement system with high temporal and spatial resolution provided according to an embodiment of the present invention. like image 3 As shown, the system includes: a first acquisition module 100 , a second acquisition module 200 , a third acquisition module 300 , a first calculation module 400 , a second calculation module 500 and a third calculation module 600 .

[0063] Specifically, the first acquisition module 100 is configured to acquire the imaging of the background pattern in the measuring device under the illumination of the illumination light source, and obtain the reference image.

[0064] The background pattern is a pattern generated based on the Poisson disk sampling method; the measurement device includes: an illumination light source, a background pattern and an imaging device, wherein the illumination light source, the background pattern, and the imaging device are sequentially arra...

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Abstract

The invention provides a full-field heat release rate measurement method and system with high temporal and spatial resolution, and relates to the technical field of optical measurement, comprising: acquiring a reference image of a background pattern in a measurement device under the illumination of an illumination light source; The position between the background pattern and the imaging device, and obtain the steady-state measurement image of the background pattern and the flame to be measured under the illumination of the illumination light source; apply the flow velocity disturbance to the flame to be measured, and obtain multiple disturbance measurements under the illumination of the illumination light source image; calculating a first pattern offset between a steady state measurement image and a reference image; calculating a plurality of second pattern offsets between a plurality of disturbance measurement images and a reference image; based on the first pattern offset and the multiple A second pattern offset is used to calculate the whole-field heat release rate pulsation result of the flame to be tested. The invention alleviates the technical problem in the prior art that the resolution of heat release rate measurement is insufficient due to the limitation of measurement conditions.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to a method and a system for measuring a full-field heat release rate with high temporal and spatial resolution. Background technique [0002] The measurement of flame heat release rate is an important issue in the field of aerospace engines, which plays an important role in optimizing the structural design of rocket engines and studying the unstable combustion mechanism of engines. The existing optical heat release rate measurement methods mainly include two methods: processing methods based on chemiluminescence light intensity and laser interference processing methods. [0003] The processing method based on light intensity usually uses a high-speed camera or a photomultiplier tube combined with a CH filter to record the flame chemiluminescence intensity I, and the disturbance of the received luminescence intensity is considered to be proportional to the disturbance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/20G01J5/48G01K17/00G01M15/14G01N25/22
CPCG01J5/20G01J5/0018G01K17/003G01N25/22G01M15/14G01J2005/0077G01J2005/204
Inventor 杨立军李敬轩张玥梁炫烨徐旭宋艳田雨
Owner BEIHANG UNIV
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