Polski

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

822
2024-03-08 14:11:01
Zobacz tłumaczenie

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

Powiązane rekomendacje
  • Researchers have proposed a new idea for quasi particle driven ultra bright light sources, which can be used in various applications from non-destructive imaging to chip manufacturing

    An international team of scientists is rethinking the fundamental principles of radiation physics, aiming to create ultra bright light sources. In a new study published in Nature Photonics, researchers from the Higher Institute of Technology in Lisbon, Portugal, the University of Rochester, the University of California, Los Angeles, and the Optical Applications Laboratory in France proposed the us...

    2023-10-24
    Zobacz tłumaczenie
  • Jingyi Optoelectronics launches a transmittance detector to detect the near-infrared transmittance characteristics of plastic materials

    Laser welding plastic transmittance tester is an important industrial testing equipment used to measure the transmittance of plastic after welding, in order to evaluate welding quality and product performance. With the widespread application of plastic products in various fields, the requirements for plastic welding quality and transparency are also increasing. Therefore, laser welded plastic tran...

    2024-04-11
    Zobacz tłumaczenie
  • Amplitude's 2024 performance shows steady growth

    In 2024, Amplitude's performance will continue to maintain steady growth, thanks to our continuous innovation in femtosecond laser technology and deep market expansion The application performance of high-power femtosecond lasers in precision microfabrication and industrial manufacturing such as semiconductors is particularly impressive, "said Ruan Xia, Sales Director of Amplitude Laser Solutions D...

    02-17
    Zobacz tłumaczenie
  • Swiitol Launches E24 Pro: A Breakthrough in Laser Engraving Technology

    In order to completely change the world of laser engraving, Swiitol has launched the E24 Pro, a 24W integrated laser engraving machine with cutting-edge features and functions. The Swiitol E24 Pro showcases an innovative integrated structure laser engraving machine made of durable aluminum alloy. It is worth noting that the device can be used out of the box without installation, providing users wi...

    2023-11-23
    Zobacz tłumaczenie
  • New type of "dynamic static dual sensing" charge coupled phototransistor

    With the development of cutting-edge technologies such as automatic guidance and embodied intelligence, machine vision has put forward higher requirements for image acquisition, requiring precise recording of static images and the ability to sensitively capture dynamic changes in the scene. The existing dynamic and active pixel sensor technology integrates two functions: dynamic event detection an...

    04-17
    Zobacz tłumaczenie