chanelink logo
CHANELINK
English

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

1118
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

  • MKS Instruments announces full year 2024 financial report

    Recently, MKS Instruments released its Q4 and full year financial results for 2024. According to the report, MKS's revenue for the fourth quarter of 2024 reached $935 million, a year-on-year increase of 4.7%, with a GAAP net income of $90 million; In 2024, the annual revenue was nearly 3.6 billion US dollars, a year-on-year decrease of 0.9%. GAAP net revenue was 190 million US dollars, turning los...

    02-20
    See translation

  • Chip guided beam for new portable 3D printers

    Imagine being able to carry a 3D printer with you and quickly create low-cost objects, such as fastening bicycle wheels or parts needed for critical medical surgeries. Scientists from the Massachusetts Institute of Technology (MIT) and the University of Texas at Austin have combined silicon photonics and photochemical technology to successfully develop the first chip based 3D printer, taking a cru...

    2024-06-18
    See translation

  • Real time measurement of femtosecond dynamics of relativistic intense laser driven ultra-hot electron beams

    In the interaction between ultra short and ultra strong lasers and matter, short pulse width and high energy electrons are generated, commonly referred to as "hot electrons". The generation and transport of hot electrons is one of the important fundamental issues in high-energy density physics of lasers. Superhot electrons can excite ultrafast electromagnetic radiation in a wide range of wavelengt...

    2024-06-21
    See translation

  • Laser fusion breakthrough brings greater energy explosion

    Recently, scientists from the National Ignition Facility at Lawrence Livermore National Laboratory in California produced a burst of energy by bombarding hydrogen pellets with 192 laser beams, briefly reproducing the fusion process that powers the sun. This is a repeat of an experiment in December last year, but this time the scientists generated more energy, with a gain almost double that of the ...

    2023-09-26
    See translation

  • In the development of modern electronic welding technology, the application advantages of laser soldering process

    With the rapid development of modern electronic information technology, integrated circuit chip packaging forms are also emerging in an endless stream, and the package density is getting higher and higher, which greatly promotes the development of electronic products to multi-function, high performance, high reliability and low cost.So far, through hole technology (THT) and surface mount technolog...

    2023-09-13
    See translation