PIV measurement of velocity field in a spray combustor

This paper reports a velocity measurement technique using PIV for application to a luminous flame in a spray combustor. The present system consists of a standard PIV system, a rotary shutter and a band-pass filter, the combination of which removes the influence of the high intensity of the luminous flame. The effectiveness of the rotary shutter is studied by changing the shutter speed from 2 ms to 37 ms. The simultaneous observation of the velocity field and the flame structure was carried out in the combustor model for a boiler. The measured velocity field indicates that the exit velocity from the burner is increased by chemical reactions, but the flow pattern inside the combustor is kept similar to that without combustion.