The rapidly changing and wide dynamic range of combustion temperature in scramjet
engines presents a major challenge to existing test techniques. Tunable diode laser …

Biomass, as a renewable energy source, is available worldwide, is carbon neutral, and can
be converted to various types of products depending on the market and on the specific …

A near-infrared (NIR) dual-gas sensor has been developed for simultaneous detection of
atmospheric trace methane (CH 4) and carbon dioxide (CO 2). To realize high sensitivity …

A calibration-free scanned wavelength modulation spectroscopy scheme requiring minimal
laser characterization is presented. Species concentration and temperature are retrieved …

Tunable diode laser absorption spectroscopy (TDLAS) was used to measure several
important process parameters at two different locations inside the reactor of an atmospheric …

Potassium (K) is an important element related to ash and fine-particle formation in biomass
combustion processes. In situ measurements of gaseous atomic potassium, K (g), using …

Combustion processes with pure oxygen (oxy-fuel) instead of air as oxidant are attractive for
high temperature thermal or thermochemical and gasification processes. The absence of …

Entropy waves play an important role in the production of indirect combustion noise and
thermoacoustic instability. The characteristics of entropy waves from swirling flames have …

Combustion facilities run on pulverized biomass often exhibit fluctuations in fuel feeding
and, thus, equivalence ratio and would benefit from fast process control based on optical λ …

In various optical feedback cavity-enhanced spectroscopies (OF-CESs) based on absorption
or scattering, conventional phase-locking methods are constrained by their ability to handle …