INSTRUMENTATION

Developing new in-flame measurement instruments and methodologies has lead IFRF to re-establish its probe manufacturing capability and also to the study of optical diagnotics with Italian industrial member ENEA.

A new quartz quenched sampling probe/FTIR analyser combination has been developed and tested on IPFR and FOSPER.


probe manufacture

IFRF Probe

IFRF traditionally manufactured probes to investigate the characteristics of industrial flames: examples are total heat flux and ellipsoidal heat flux probes for flame radiation measurement, standard pyrometers and high temperatures pyrometers for temperature characterization, sampling probes for gas and particulate analysis, 5 hole pitots and LDV probes for velocity measurements.

In view of the increasing need for more and more detailed data coming from combustion mathematical modelers, we have revised our traditional designs, linking them where possible to advantageous new technologies. 

Protypes for sale

  • Suction pyrometers: Probes for in-flame temperature measurements - available in different sizes
  • Sampling probes: Probes for sampling gases or solid matter inside the flame – available with different tips.
  • Nitrogen species sampling probes: Special probes with a quartz tip used to sample such gases with higher accuracy
  • Total heat flux radiometers: Probes for the measurement of the total heat flux incident upon the walls of the combustion chamber
  • Ellipsoidal radiometers: Probes for the measurement of the radiative heat flux incident upon the walls of the combustion chamber from a hemisphere

All of these probes can be tailor made to suit specific requirements.

Download a product sheet for more information or email us direct on info@ifrf.net 

IFRF Members can expect a substantial price discount!

 

optical diagnostics

IFRF continues to work with ENEA to test their Optical Diagnostic in Combustion system. ODC is based on the principle of the analysis of the spectrum of turbulent flame radiative emission collected by means of a photo-diode device. Radiative emission of a flame is due to chemiluminescence effect (dynamics of radicals concentrations) and to thermal emission of a gray/black body. Spectra show a decaying trend towards high frequencies and instabilities are easily detected.

ODC tests on Fo.Sper during oxy-coal campaigns have demonstrated the system’s ability to monitor the existence of different combustion regimes and transitions between them, and to capture, even in semi-quantitative terms, important characteristics of the emission related to the flow field and the temperature profile in the furnace, highlighting the existence of frequencies typical for all operating conditions.

The ODC optical technique was also applied at the IPFR (Isothermal Plug Flow Reactor) to obtain information on the combustion of solid fuel particle streams. The optical probes were found able to capture the passage of coal streams and to identify different phenomena (e.g. volatiles ignition, char oxidation). The spatial arrangement of the probes was studied in order to allow also deriving quantitative information (such as particle velocity, ignition delay and devolatilization time) from the correlation of four single signals. Results are of great interest as the derivation of heterogeneous and homogeneous kinetics in O2/CO2 atmosphere is acknowledged to be one of the main research needs for the development of oxy-combustion technology.

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