Tip Vortex Effects on Rotor Aeroacoustics via Hybrid Blade Element Momentum Theory–Free Vortex Wake Prediction

What is it about?

This paper examines how wakes and tip vortices formed during rotor operation generate unsteady airflows that contribute to noise. We enhance rotor noise prediction by integrating traditional aerodynamic model with low-fidelity tip vortex model to account for wake effects more accurately. Results shows that while the wake model has little impact on noise in hover, it significantly improves noise prediction in forward flight. This approach offers a fast and efficient way to estimate rotor noise in low-altitude flight scenarios.

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Photo by Dose Media on Unsplash

Photo by Dose Media on Unsplash

Why is it important?

We have developed a fast noise prediction model that can be used in UAS structural design and flight path planning. This model consumes fewer computing resources and obtains relatively reliable prediction results.

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