Calculation of Propeller Thrust

[fflachowski]

Is there any way to calculate the thrust provided by a propeller, given only the geometry of the propeller and the windspeed.

Given:
Stationary propeller
Wind Speed = 30 m/s
Blades = 10

Propeller Geometry:
Constant Chord length (γ)
Square tip Propeller
Pitch at root = α
Pitch at tip = β
Advance ratio = 1.17
Propeller Rotation = ω

Blade Span = ε
Blade Diameter = μ
Hub Diameter = σ

Assume linear change in pitch

We do not know the downstream velocity therefore thrust calculation is complicated. Any ideas how to go about this problem? I am also starting to learn CFD calculations using Fluent but the mesh is very complicated. I must also check using some numerical solution. Ideas?

Thank you

 

[Navin A S]

.Unfortunately, calculating the thrust provided by a propeller given only the geometry and windspeed is not possible. This is because the thrust generated by a propeller is dependent on the downstream velocity which is determined by the interaction between the propeller and the surrounding air. Without the downstream velocity, it is not possible to calculate the thrust generated by the propeller. However, there are a few numerical methods that may be used to estimate the thrust generated by a stationary propeller in a wind tunnel. The most common of these methods is the blade element momentum theory (BEMT). BEMT assumes that a propeller can be divided into several blade elements, each with its own local flow conditions. By using the geometry of the propeller and knowledge of the local flow conditions, BEMT can be used to calculate the thrust produced by the propeller. In addition to BEMT, other numerical methods such as Computational Fluid Dynamics (CFD) simulations may also be used to estimate the thrust generated by a stationary propeller in a wind tunnel. CFD simulations require a detailed mesh of the propeller and the surrounding air, and can be quite computationally intensive. However, they provide more accurate results than BEMT, and can be used to study the flow around the propeller in greater detail.In conclusion, it is not possible to calculate the thrust generated by a propeller given only the geometry and windspeed. However, a number of numerical methods such as BEMT or CFD simulations can be used to estimate the thrust generated by a stationary propeller in a wind tunnel.