The oxidizer-to-fuel ratio (O/F ratio) can also be expressed in terms of pressure, especially in the context of combustion and propulsion systems where pressure is a critical parameter. This is often done in rocketry and combustion engineering. The pressure-based O/F ratio is used to understand and control the combustion process in the combustion chamber of a rocket engine or other combustion systems.
To calculate the pressure-based O/F ratio, you typically use the pressure 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.