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
  • Historic Moment! The 100th TruLaser Cell Series 3D Five-Axis Laser Cutting Machine Successfully Rolls Off the Production Line in China

    Driven by the global trend of lightweighting in new energy vehicles (NEVs), TRUMPF has reached a significant milestone in Taicang, Jiangsu—the successful rollout of the 100th TruLaser Cell series 3D five-axis laser cutting machine. This achievement is more than just a numerical breakthrough; it symbolizes the deep integration of German technology with Chinese manufacturing and underscores TRUMPF's...

    03-14
    Zobacz tłumaczenie
  • Lightmatter announces the first 16 wavelength bidirectional link on single-mode fiber

    Lightmatter, a Boston-based startup developing silicon photonics hardware aimed at AI and high-performance computing, has announced a 16-wavelength bidirectional Dense Wavelength Division Multiplexing optical link operating on one strand of standard single-mode (SM) fiber.Powered by Lightmatter’s Passage interconnect and Guide laser technologies, this development “shatters previous limitations in ...

    08-22
    Zobacz tłumaczenie
  • Edmund Optics acquisition son-x

    Recently, globally renowned optical component manufacturer Edmund Optics announced that the company has acquired ultrasonic assisted systems and high-precision optical manufacturer son-x.Edmund Optics, as a leader in optical technology solutions, has been serving various fields such as life sciences, biomedicine, industrial testing, semiconductors, and laser processing since its establishment in 1...

    01-22
    Zobacz tłumaczenie
  • Researchers have reinvented laser free magnetic control

    In a significant advancement in material physics, researchers from Germany and the United States have theoretically demonstrated that only extremely thin materials need to be α- RuCl3 can be placed in an optical cavity to control its magnetic state.This discovery may pave the way for new methods of controlling material properties without the use of strong lasers.The Role of Optical Vacuum W...

    2023-11-09
    Zobacz tłumaczenie
  • Underwater laser cutting has been achieved with several advantages over common technologies such as saws, automatic wire saws and plasma cutting machines

    Due to the growing demand for renewable energy, the need for modern technologies to dismantle existing underwater infrastructure is also growing.For example, in order to boost the power of an offshore wind farm to a higher level, the existing old steel frame, which may be below sea level, must first be removed so that engineers can rebuild the steel frame for higher power.In laboratory tests, rese...

    2023-09-13
    Zobacz tłumaczenie