New pressure sensing method for high-temperature combustion diagnostics is not affected by concentration variations
In a groundbreaking development in the field of high-temperature combustion diagnostics, a team of researchers led by Prof. GAO Xiaoming and Prof. LIU Kun from the Hefei Institutes of Physical Science (HFIPS) at the Chinese Academy of Sciences (CAS) have successfully devised a concentration-independent pressure sensing method utilizing two-color laser absorption spectroscopy. The innovative method addresses the challenges faced by conventional contact pressure sensors, which not only disrupt combustion flows but also encounter limitations in terms of temperature tolerance of sensor materials.
Published in Optics Letters, the research focuses on the significance of pressure monitoring in high-temperature environments, particularly in the context of aero-engines that are increasingly adopting high temperature and pressure combustion for enhanced thermodynamic efficiency. Pressure serves as a crucial parameter for both monitoring engine performance and diagnosing potential faults. The newly developed non-contact pressure sensing method has been demonstrated to operate effectively at temperatures up to 1300 K, showcasing its potential for real-world applications in demanding combustion environments.
One of the key highlights of this research is the identification of a method to eliminate the impact of molecular concentration on gas pressure measurements in high-temperature settings. By leveraging the collision-broadened linewidths of two absorption lines, the researchers were able to achieve concentration-independent pressure measurement. This significant breakthrough opens up new possibilities for accurate pressure sensing in challenging environments where traditional methods fall short.
Notably, the study validated this approach by focusing on the main product of hydrocarbons fueled combustion systems, namely H2O. By utilizing two absorption lines of H2O located near 1343 nm and 1392 nm in a meticulously designed heated absorption cell, the researchers achieved impressive results in terms of temporal resolution and measurement uncertainties. The pressure measurements attained a remarkable temporal resolution of 50 μs and uncertainties as low as 3%, underscoring the precision and reliability of the newly developed method.
Prof. LIU Kun emphasized the importance of this finding, stating that it provides a valuable tool for pressure sensing in high-temperature environments and has the potential to drive advancements in laser-based multi-parameter diagnostics for combustion science. By enabling concentration-independent pressure measurements, this research paves the way for more accurate and efficient monitoring of combustion processes in demanding industrial settings.
Overall, this study represents a significant advancement in the field of combustion diagnostics, offering a novel approach to pressure sensing that is not only effective in high-temperature environments but also addresses the limitations of traditional contact pressure sensors. The potential implications of this research extend to various industries relying on combustion processes, from aero-engine manufacturing to energy production and beyond, where precise pressure monitoring is essential for optimizing performance and ensuring operational safety.
(Source: https://www.eurekalert.org/news-releases/1036872)
Published in Optics Letters, the research focuses on the significance of pressure monitoring in high-temperature environments, particularly in the context of aero-engines that are increasingly adopting high temperature and pressure combustion for enhanced thermodynamic efficiency. Pressure serves as a crucial parameter for both monitoring engine performance and diagnosing potential faults. The newly developed non-contact pressure sensing method has been demonstrated to operate effectively at temperatures up to 1300 K, showcasing its potential for real-world applications in demanding combustion environments.
One of the key highlights of this research is the identification of a method to eliminate the impact of molecular concentration on gas pressure measurements in high-temperature settings. By leveraging the collision-broadened linewidths of two absorption lines, the researchers were able to achieve concentration-independent pressure measurement. This significant breakthrough opens up new possibilities for accurate pressure sensing in challenging environments where traditional methods fall short.
Notably, the study validated this approach by focusing on the main product of hydrocarbons fueled combustion systems, namely H2O. By utilizing two absorption lines of H2O located near 1343 nm and 1392 nm in a meticulously designed heated absorption cell, the researchers achieved impressive results in terms of temporal resolution and measurement uncertainties. The pressure measurements attained a remarkable temporal resolution of 50 μs and uncertainties as low as 3%, underscoring the precision and reliability of the newly developed method.
Prof. LIU Kun emphasized the importance of this finding, stating that it provides a valuable tool for pressure sensing in high-temperature environments and has the potential to drive advancements in laser-based multi-parameter diagnostics for combustion science. By enabling concentration-independent pressure measurements, this research paves the way for more accurate and efficient monitoring of combustion processes in demanding industrial settings.
Overall, this study represents a significant advancement in the field of combustion diagnostics, offering a novel approach to pressure sensing that is not only effective in high-temperature environments but also addresses the limitations of traditional contact pressure sensors. The potential implications of this research extend to various industries relying on combustion processes, from aero-engine manufacturing to energy production and beyond, where precise pressure monitoring is essential for optimizing performance and ensuring operational safety.
(Source: https://www.eurekalert.org/news-releases/1036872)
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