温度场纹影定量测量技术

张雄星; 王伟; 刘光海; 郭子龙; 胡锐

doi:10.3788/CO.20181105.0860

Volume 11 Issue 5

Oct. 2018

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Chinese Optics > 2018 > 11(5): 860-873.

ZHANG Xiong-xing, WANG Wei, LIU Guang-hai, GUO Zi-long, HU Rui. Quantative measuring technique for the temperature of flow fields in schlieren systems[J]. Chinese Optics, 2018, 11(5): 860-873. doi: 10.3788/CO.20181105.0860

Citation:

ZHANG Xiong-xing, WANG Wei, LIU Guang-hai, GUO Zi-long, HU Rui. Quantative measuring technique for the temperature of flow fields in schlieren systems[J]. Chinese Optics, 2018, 11(5): 860-873. doi: 10.3788/CO.20181105.0860

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Quantative measuring technique for the temperature of flow fields in schlieren systems

doi: 10.3788/CO.20181105.0860

1.
School of Optoelectronics Engineering, Xi'an Technological University, Xi'an 710021, China
2.
Sichuan Physcience Optics and Fine Mechanics Co., Ltd., Mianyang 621900, China

More Information

Corresponding author: WANG Wei, E-mail:wangwei@xatu.edu.cn
Received Date: 17 Dec 2017
Rev Recd Date: 28 Feb 2018
Publish Date: 01 Oct 2018

Abstract

Abstract

In order to study temperature field measurement techniques of Schlieren systems, the principle of Schlieren quantitative measuring techniques is expounded. Based on the relationship between the grayness of a Schlieren image, along with the area of a light source, we propose an algorithm that is dependent on Schlieren to calculate flow field temperature. Firstly, a transmission Schlieren system is built on an optical platform and a hot plate is placed in the test area. Schlieren images are then captured by using a CCD camera, which are uploaded and stored on a computer for image processing. Finally, the algorithm is used to get the measured values of the temperature field, which then are compared with those by thermocouple measurement. The experimental results show that, when the temperature of the hot plate is set at 50℃ or 90℃, the relative errors of the flow field temperature measurement are less than 10%, the reliability of the algorithm is therefore proved and the quantitative measurement of temperature fields based on Schlieren techniques is realized.
- schlieren,
- quantitative measurement,
- flow field,
- image gray magnitude

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References(15)

References

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