The pressure-based oxidizer-to-fuel ratio (O/F ratio) is a concept used in combustion and rocket propulsion, particularly in the context of liquid rocket engines. In this approach, the O/F ratio is expressed in terms of the pressures of the oxidizer and fuel. This ratio can be used to monitor and control the combustion process by adjusting the pressures of the oxidizer and fuel.
The pressure-based O/F ratio (Φ_P) can be defined as:
Where:
- Φp is the pressure-based O/F ratio.
- Pox is the pressure of the oxidizer.
- Pfuel is the pressure of the fuel.