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By removing the thrust chamber assembly, including the main combustion chamber, main injector and nozzle, engineers can push more easily the turbomachinery components over a wide range of conditions to demonstrate durability and safety margins.
Direct fuel injection involves spraying atomized fuel directly into the main combustion chamber, while a turbocharger (often in conjunction with an intercooler) increases the amount of fuel that is injected and combusted at any given time.
The application includes a main combustion chamber of 65 square feet, and two smaller 43 square feet chambers for individual cremations, so customers can take their pets' ashes away.
What is new is a staged combustion cycle that results in greater fuel efficiency than the F-1's gas generator cycle by reusing some of the fuel and oxidizer used in the pre-burner to power the main combustion chamber.
1, each engine has two powerful high-pressure turbopumps that supply up to 970 lb of liquid oxygen (oxidizer) per sec and up to 162 lb of liquid hydrogen (fuel) per sec to the engine's main combustion chamber.
An aecelerator plate transmits the flame front through 18 holes into the main combustion chamber, creating an even burst to propel the piston forward.
To limit exhaust emissions to less than 1 gram per brake horsepower-hour of NOx, each G3612 engine employs a pre-combustion chamber design which facilitates burning of a lean 18:1 air/fuel mixture in the main combustion chamber.
Block II engines will include all Block I improvements, plus the new Large Throat Main Combustion Chamber and Pratt & Whitney's High Pressure Fuel Alternate Turbopump.