Some times a symbol doesn't have deeper meaning. It is there for practicality. The hurricane symbol on aircraft engines (spirals and swirls) are a safety thing.
https://aerosavvy.com/aircraft-engine-spirals/
>The reason for painting designs on engine spinners is for the safety of ground personnel. Working near a running jet engine is extraordinarily dangerous. A Boeing 737 engine, running at idle power, has a hazard zone of 9 feet to the front and sides of the engine. This means that, even at idle thrust, a human that walks in the hazard area runs the risk of being sucked inside and consumed by the engine.