Designed for studying the flame control techniques used in all gas combustion systems. This bench top unit allows supervised student operation and analysis over a very wide range of air/fuel ratios and gaseous fuel types. The observations and experiments that can be conducted include flame stability, the plotting of stability diagrams, measurement of the air/fuel ratio, flame speed, arresting and quenching techniques as well as methods of expanding stability limits.
The unit is designed so that additional student project work may be easily undertaken.
An instrumentation console provides an adjustable and measured flow of both air and gas. Two flowmeter in series, ensure that a wide range of typical slow burning gaseous fuels (e.g. Propane, Butane, Methane LPG) can be used and measured accurately. For operator safety an interlock ensures that gas flow can only be initiated with an operator actively in attendance.
Both air and gas are separately introduced into a mixing block designed to accommodate a variety of burner mixing tubes and adapters.
Various settings of air fuel ratios allow the stability characteristics of a gas flame to be examined, and the upper and lower stability limits of both “lift off” and “light back” plotted on a stability diagram.
The dual structure of pre-aerated flames is illustrated with the aid of the "Smithells” separation experiment. A length of heat resistant glass tube and supporting ring is provided to enable the primary and secondary flames to be separated.