Wind Speed Attenuation Formula

Wind Speed Attenuation Formula calculator can be used to calculate how wind speed decreases with distance from the source of wind generation (such as a wind turbine). This calculator uses the logarithmic wind profile model.

Input Parameters

Calculation Results

Calculation Formula

Attenuated Wind Speed = Initial Speed × log10(Height / Roughness Length)

Where:
Initial Speed = Initial Wind Speed (m/s)
Height = Distance from Source (m)
Roughness Length = Surface roughness parameter (m)

Result

Attenuated Wind Speed:

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Percentage Reduction:

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Wind Speed Attenuation Formula Calculator Usage Guide

Learn how to use the Wind Speed Attenuation Formula calculator and its working principles

How to Use This Calculator

  1. Enter the initial wind speed in meters per second (m/s).
  2. Enter the distance from the source of the wind (e.g., a wind turbine) in meters (m).
  3. Optionally, enter the roughness length. The default value of 0.03 meters is suitable for open areas like plains. For urban areas, this value would be higher.
  4. Click the "Calculate" button to compute the attenuated wind speed and the percentage reduction.

Understanding the Formula

This calculator uses the logarithmic wind profile model, which is commonly used in wind energy assessments:

Attenuated Wind Speed = Initial Speed × log10(Height / Roughness Length)

This formula assumes that wind speed decreases logarithmically with distance from the source, affected by surface roughness.

Practical Applications

  • Designing wind farms to optimize layout and energy production
  • Assessing wind resource potential at locations far from existing wind farms
  • Understanding how wind speed varies across different terrains

Example

If an initial wind speed of 10 m/s is measured at a distance of 500 meters from a wind turbine (with a roughness length of 0.03 m), the calculator will show that the wind speed at that distance is approximately 4.77 m/s, representing a 52.3% reduction.