Autothermic engines, also known as autothermal engines, are a type of engine that combines internal combustion and external combustion processes to produce power. These engines are not commonly used in aircraft design, but I can provide a general understanding of how their power output might be calculated.
Autothermic Engine Power Output (P): This represents the mechanical power produced by the autothermic engine and is typically measured in watts (W), kilowatts (kW), or horsepower (hp).
The formula for calculating Autothermic Engine Power Output may depend on the specific design and operation of the engine. In a simplified sense, it could be expressed as the difference between the heat input (from the combustion process) and losses:
- Heat Input: This represents the heat energy added to the engine through combustion processes. It can be calculated based on the fuel’s energy content and combustion efficiency.
- Losses: These include various losses such as friction, heat losses to the surroundings, and other losses associated with the engine’s operation.