chanelink logo
CHANELINK
English

Developing a concentration independent pressure sensing method for high-temperature combustion diagnosis

1017
2024-03-08 14:11:01
See translation

Recently, a research group led by Professor Gao Xiaoming and Professor Liu Kun of the Chinese Academy of Sciences Hefei Institute of Physical Sciences developed a concentration independent pressure sensing method based on two-color laser absorption spectrum for high-temperature combustion diagnosis.

The research findings are published in Optics Letters.
Aircraft engines are developing towards high-temperature and high-pressure combustion to improve thermodynamic efficiency. Pressure is an important parameter for monitoring engine performance and diagnosing engine faults. However, traditional contact pressure sensors not only interfere with the combustion flow, but are also limited by the temperature tolerance of the sensor material.

In this study, researchers developed a non-contact pressure sensing method for high-temperature environments and demonstrated it at temperatures up to 1300 K. The focus of this study is on how to address the impact of molecular concentration on gas pressure measurement in high-temperature environments.

Scientists have found that the collision broadening of two absorption lines coupled can eliminate concentration variables. With this discovery, scientists can achieve concentration independent pressure measurements. Considering that the main product of combustion systems fueled by hydrocarbons is H2O, they validated this finding with two H-absorption lines, where H2O is located near 1343 nm and 1392 nm on a carefully designed heating absorption cell. The time resolution and uncertainty of pressure measurement are respectively 50 μ Realize at s and 3%.

Professor Liu Kun said, "Our findings provide valuable tools for pressure sensing in high-temperature environments and can promote the development of multi parameter diagnosis in laser based combustion science.".

Source: Laser Net

Related Recommendations

  • Surface coupled laser technology manufacturer, secured £ 2.94 million in financing

    Recently, renowned surface coupled laser technology supplier Vector Photonics announced that it has received £ 1.667 million in equity investment and £ 1.27 million in additional research funding for the continued commercialization of its unique surface coupled laser (SCL) technology. Surface coupled lasers have completely changed semiconductor laser manufacturing, improving the performance of var...

    2024-06-14
    See translation

  • Leica Measurement System Development First Person Laser Scanner

    Leica Geosystems, a subsidiary of Hexagon, has developed Leica BLK2GO PULSE, its first person laser scanner, which combines LiDAR sensor technology with the original Leica BLK2GO shape. The technology will be released in early 2024.The scanner provides users with a fast, simple, and intuitive first person scanning method that can be controlled through a smartphone and provides real-time full color...

    2023-10-19
    See translation

  • Significant progress made in 808nm high-power semiconductor laser chips

    The R&D team of Xi'an Lixin Optoelectronics Technology Co., Ltd. (hereinafter referred to as "Lixin Optoelectronics") has made significant progress in 808nm high-power semiconductor laser chips through continuous technological breakthroughs.808nm semiconductor laser, as an ideal and efficient solid-state laser pump source, plays an important role in advanced manufacturing, mechanical processin...

    2024-06-14
    See translation

  • Intel: Has acquired most of ASML's NA extreme ultraviolet lithography equipment in the first half of next year

    According to Korean media reports, Intel has acquired most of the high numerical aperture (NA) extreme ultraviolet (EUV) lithography equipment manufactured by ASML in the first half of next year.ASML plans to produce 5 high NA EUV lithography equipment this year, all of which will be supplied to Intel.They stated that ASML has an annual production capacity of approximately 5-6 High Numerical Apert...

    2024-05-21
    See translation

  • Laser additive manufacturing: monitoring during defect occurrence

    Researchers at the Federal Institute of Technology in Lausanne have resolved the long-standing debate surrounding laser additive manufacturing processes through a groundbreaking defect detection method.The development of laser additive manufacturing is often hindered by unexpected defects. Traditional monitoring methods, such as thermal imaging and machine learning algorithms, have shown significa...

    2023-12-06
    See translation