Not quite --
The B-52G used 10,000 pounds of water in approximately 90 seconds during takeoff roll and initial climb out. It was injected just aft of the burner cans and before the turbine section as I recall. It's purpose was to keep the EGT (exhaust gas temperature) within limits. By keeping the EGT down, more fuel could be burned thus allowing more thrust to be developed while still maintaining limits.