chanelink logo
CHANELINK
Nederlands

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

394
2024-03-08 14:11:01
Bekijk vertaling

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

Gerelateerde aanbevelingen

  • Alcon acquires ophthalmic laser equipment company for $466 million

    On July 3rd local time, Swiss ophthalmic care giant Alcon announced the acquisition of Israeli medical technology company Belkin Vision and its laser equipment assets for treating glaucoma.The transaction includes a prepayment of $81 million, of which approximately $65 million is in cash. In addition, if Alcon can establish this technology as the preferred first-line treatment option for clinical ...

    2024-07-09
    Bekijk vertaling

  • The new chip opens the door to artificial intelligence computing at the speed of light

    Engineers at the University of Pennsylvania have developed a new chip that uses light waves instead of electricity to perform complex mathematical operations necessary for training artificial intelligence. This chip has the potential to fundamentally accelerate the processing speed of computers while reducing their energy consumption.The design of a silicon photonic chip was the first to combine t...

    2024-02-18
    Bekijk vertaling

  • Researchers are studying lasers for controlling magnetic ripple interactions

    One vision for computing the future is to use ripples in magnetic fields as the fundamental mechanism. In this application, magnetic oscillators can be comparable to electricity and serve as the foundation of electronic products.In traditional digital technology, this magnetic system is expected to be much faster than today's technology, from laptops and smartphones to telecommunications. In quant...

    2024-02-11
    Bekijk vertaling

  • Researchers have implemented a creative approach to reduce stray light using spatial locking technology based on periodic shadows

    Reducing stray light is one of the main challenges in combustion experiments using laser beams (such as Raman spectroscopy) for detection. By using a combination of ultrafast laser pulses and gated ICCD or emICCD cameras, a time filter can be effectively used to remove bright and constant flame backgrounds. When the signal reaches the detector, these cameras can open electronic shutters within the...

    2023-10-16
    Bekijk vertaling

  • Shanghai Institute of Optics and Fine Mechanics has made progress in the generation of third harmonic in laser air filamentation

    Recently, the team from the State Key Laboratory of Intense Field Laser Physics, Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences found that the third-order harmonics induced by air filamentation of high repetition rate femtosecond lasers have significant self jitter. To solve this bottleneck problem, a solution based on an external DC electric field was proposed, which sign...

    2024-10-10
    Bekijk vertaling