1. What is Whirl Velocity at Inlet?

Whirl Velocity at Inlet is defined as the component of velocity of jet in the direction of motion of the vane. It is a crucial parameter in turbine design and fluid mechanics calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{wi} \) — Whirl Velocity at Inlet (m/s)
• \( V_{fi} \) — Flow Velocity at Inlet (m/s)
• \( \alpha \) — Guide Blade Angle (radians)

Explanation: The formula calculates the whirl velocity component based on the flow velocity and the guide blade angle using trigonometric relationships.

3. Importance of Whirl Velocity Calculation

Details: Accurate calculation of whirl velocity is essential for turbine design, efficiency analysis, and understanding fluid dynamics in turbomachinery applications.

4. Using the Calculator

Tips: Enter flow velocity at inlet in m/s and guide blade angle in radians. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the physical significance of whirl velocity?
A: Whirl velocity represents the tangential component of fluid velocity that contributes to the rotational motion of turbine blades.

Q2: Why is the tangent function used in this formula?
A: The tangent function relates the flow velocity component to the guide blade angle through trigonometric relationships in the velocity triangle.

Q3: What units should be used for the guide blade angle?
A: The guide blade angle should be entered in radians for accurate calculation.

Q4: Can this formula be used for all types of turbines?
A: This formula is specifically applicable for turbines where the velocity triangle analysis with guide blades is appropriate.

Q5: What factors affect whirl velocity?
A: Whirl velocity is primarily affected by the flow velocity at inlet and the angle of the guide blades.