RT Journal Article
ID 40eaeda43502fc11
A1 Gandilhon, David
T1 SHEAR COAXIAL INJECTOR LOX DROPLET MEASUREMENTS AS A FUNCTION OF HYDROGEN INJECTION TEMPERATURE
JF Atomization and Sprays
JO AAS
YR 2008
FD 2007-07-13
VO 18
IS 1
SP 85
OP 96
AB A hydrogen gas chiller was designed and fabricated in order to simulate the hydrogen temperature ramping test for liquid rocket engines in a single-element gaseous hydrogen/liquid oxygen combustion chamber. Hot fire PDPA measurements of droplet sizes and velocities as a function of the gaseous hydrogen temperature for a fixed mass flow and shear coaxial injector configuration were obtained as the hydrogen temperature was varied from 130 to 290 K, resulting in a doubling of the hydrogen/oxygen velocity and momentum flux ratios. Measured droplet Sauter and arithmetic mean diameters decreased as the hydrogen temperature increased. However, even though the hydrogen temperature change resulted in a doubling of the velocity and momentum flux ratios, the droplet Sauter mean diameter only decreased by 12.5%. These results indicate that the increase in droplet size as the injected hydrogen temperature is decreased may not be a significant contributor to the resulting combustion instability for liquid rocket engines operating at the conditions examined in this study.
PB Begell House
LK https://www.dl.begellhouse.com/journals/6a7c7e10642258cc,7da5e43f06d335eb,40eaeda43502fc11.html