chanelink logo
CHANELINK
English

Pressure sensing using dual color laser absorption spectroscopy

1190
2024-03-09 13:58:51
See translation

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

Related Recommendations

  • Tiedra Famaceutica uses Macsa ID's SPA2 CB laser marking system

    Tiedra Famaceutica was founded by members of the Tiedra family in 2003 and is a manufacturer of contact lenses, health and ophthalmic products, as well as diagnostic instruments used in optometry and ophthalmic clinics.Before installing the SPA2 CB laser model for Macsa id, Tiedra used a pantograph, which is a quadrilateral system composed of hinged rods. This manual process provides limited marki...

    2023-12-14
    See translation

  • The L4 Aton laser at Eli Beamlines achieves an output power of 5 petawatts

    According to the Extreme Light Infrastructure (ELI), the L4 ATON kilojoule laser at the ELI beamline facility in Dolní Břežany near Prague, Czech Republic, has achieved peak powers exceeding 5 petawatts (10¹⁵ W).The research institute stated: “This confirms that L4 can operate safely and reliably at this energy level, which is crucial for scaling up power and preparing for scientific experiments.”...

    10-28
    See translation

  • The 2023 International Quantum Photonics Conference attracted over 600 attendees from 16 countries and regions

    On November 25th, Jinhua welcomed the 2023 International Quantum Photon Conference, which will lead the future of technology. This grand event is jointly hosted by the Chinese Society of Optical Engineering and the Jinhua Municipal Government, with joint support from the University of Science and Technology of China, Zhejiang Normal University, and the PhotoniX journal. The conference, with the th...

    2023-11-27
    See translation

  • Research progress and prospects of CFRP laser surface cleaning

    Researchers from Materials Science at Harbin Institute of Technology, Zhengzhou Research Institute at Harbin Institute of Technology, and Key Laboratory of Microsystems and Microstructure Manufacturing at Harbin Institute of Technology, Ministry of Education, reviewed and reported on the research progress of laser surface cleaning of carbon fiber reinforced polymer composites (CFRP). The relevant ...

    03-06
    See translation

  • BluGlass successfully raised $5.87 million to accelerate GaN laser production and delivery

    Recently, BluGlass, a leading global semiconductor development company, successfully completed its stock purchase plan (SPP) and raised $5.87 million in funds (excluding costs). This SPP provides eligible shareholders with the opportunity to subscribe to up to $100000 in new shares of BluGlass at a discounted price of $0.037 per share, along with free additional options. This initiative has gained...

    2024-04-12
    See translation