Temperature measurement of boundary layer combustion flame on solid rocket fuel using a two-color pyrometer and high-speed camera

Abstract

Two-color pyrometer technique with a high-speed camera was conducted　to measure the combustion flame temperature on the solid fuel of a hybrid rocket. The combustion flame above 2600 K formed at a chamber pressure of 2.0 MPa was analyzed using the Hottel & Broughton method based on the red and green luminance recorded by a high-speed camera. The study revealed high-speed phenomena on the fuel surface, which had previously been obscured. It is also presented that image analysis by the two-color pyrometer method is a powerful technique for measuring the high temperature formed on the solid fuel surface.