chanelink logo
CHANELINK
Español

Pressure sensing using dual color laser absorption spectroscopy

897
2024-03-09 13:58:51
Ver traducción

The research team led by Professor Gao Xiaoming and Professor Liu Kun of the Chinese Academy of Sciences Hefei Institute of Physical Sciences recently designed a concentration independent pressure sensing technology for high-temperature combustion diagnosis. This method is based on dual color laser absorption spectroscopy.

The results of this study have been published in Optics Letters.
Aircraft engines are transitioning towards high-temperature and high-pressure combustion to improve thermodynamic efficiency. Pressure is a key parameter for monitoring engine performance and diagnosing engine faults. However, traditional contact pressure sensors can disrupt combustion flow and are limited by the temperature tolerance of the sensor material.

The researchers of this study designed a non-contact pressure sensing technology for high-temperature environments and tested it at temperatures up to 1300 K. This study mainly addresses the challenge of considering the influence of molecular concentration on gas pressure measurement in such an environment.

Researchers have found that by connecting double absorption lines to widen the collision line width, concentration variables can be alleviated. This breakthrough enables researchers to achieve concentration independent pressure measurements.

To verify this discovery, considering that the main product of hydrocarbon fuel combustion systems is H2O, the team used double absorption lines of H2O near 1343 nm and 1392 nm in a precisely designed heating absorption cell. They each achieved 50 μ S and 3% time resolution and pressure measurement uncertainty.

Source: Laser Net

Recomendaciones relacionadas

  • Researchers have developed a new type of frequency comb that is expected to further improve the accuracy of timing

    The chip based device, known as the frequency comb, measures the frequency of light waves with unparalleled accuracy, completely changing timing, detection of exoplanets, and high-speed optical communication.Now, scientists and collaborators from the National Institute of Standards and Technology in the United States have developed a new method for manufacturing combs, which is expected to improve...

    2024-03-15
    Ver traducción

  • Germany and the United States jointly build a $150 million laser equipment laboratory for studying inertial fusion energy and high energy density physics

    German laser Fusion developer Marvel Fusion said it will partner with Colorado State University (CSU) on a new $150 million laser equipment lab to study inertial fusion energy and high energy density physics."It will be home to one of the most powerful laser facilities in the world and an international center for laser fusion energy and high energy density physics research," the company said in a ...

    2023-08-10
    Ver traducción

  • NICT Japan corrects sudden data errors caused by atmospheric turbulence in laser links

    The National Institute of Information and Communication Technology of Japan, Nagoya Institute of Technology, and Japan Aerospace Exploration Agency have achieved the so-called "world's first successful demonstration of next-generation error correction codes, reducing the impact of atmospheric turbulence on ground to satellite laser communication".Atmospheric turbulence in ground-to-satellite laser...

    10-25
    Ver traducción

  • New LiDAR can 'see' faces from hundreds of meters away

    At a distance of 325 meters, the human eye may only be able to distinguish between a person's head and body, making it difficult to discern any other differences. But a research team including Heriot Watt University in the UK and Massachusetts Institute of Technology in the US has developed a new type of LiDAR scanner that can perform detailed analysis of a person's face from such a distance and c...

    02-11
    Ver traducción

  • Breaking the limits of optical imaging by processing trillions of frames per second

    Pursuing higher speed is not just exclusive to athletes. Researchers can also achieve such feats through their findings. The research results of Professor Liang Jinyang and his team from the National Institute of Science (INRS) have recently been published in the journal Nature Communications.The team located at the INRS É nergie Mat é riaux T é l é communications resea...

    2024-04-08
    Ver traducción