Measurement of the velocity of products of combustion in gas-fired heaters

A. M. Jacobi, V. W. Goldschmidt

Research output: Contribution to journalArticlepeer-review


A relatively simple scheme is presented for measuring the velocity in an environment such as the flue way of gas-fired furnaces and heaters. The scheme employs a measure of the correlation between two thermocouples displaced in the axial direction. Analysis of the time-delayed correlation between these two signals shows a maximum value of the correlation function at a delayed time which corresponds to the transit time between both sensors. Knowledge of the separation between these sensors permits a measure of the velocity. While the accuracy of the device may be on the order of 10%, the procedure is straightforward and simple, requires no calibration, and is not dependent on the local properties of the fluid.

Original languageEnglish (US)
Pages (from-to)293-296
Number of pages4
JournalFlow Measurement and Instrumentation
Issue number5
StatePublished - Oct 1990
Externally publishedYes


  • correlation
  • flue-gas
  • thermocouples
  • time delay
  • transit time
  • velocity

ASJC Scopus subject areas

  • Modeling and Simulation
  • Instrumentation
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Measurement of the velocity of products of combustion in gas-fired heaters'. Together they form a unique fingerprint.

Cite this