1. What is Flow Velocity Given Whirl Velocity?

Flow Velocity at Inlet is the velocity of the flow at the entrance of the turbine, calculated based on the whirl velocity and guide blade angle using trigonometric relationships.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula uses the tangent trigonometric function to relate the whirl velocity component to the actual flow velocity based on the guide blade angle.

3. Importance of Flow Velocity Calculation

Details: Accurate flow velocity calculation is crucial for turbine design and performance analysis, as it affects energy transfer efficiency and overall system performance.

4. Using the Calculator

Tips: Enter whirl velocity in m/s and guide blade angle in radians. Both values must be positive numbers for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is whirl velocity?
A: Whirl velocity is defined as the component of velocity of jet in the direction of motion of the vane.

Q2: Why use radians for angle measurement?
A: Radians are the standard unit for angular measurement in mathematical calculations involving trigonometric functions.

Q3: What is the typical range for guide blade angles?
A: Guide blade angles typically range from 0 to 90 degrees (0 to π/2 radians), depending on the turbine design and application.

Q4: Can this formula be used for all turbine types?
A: This formula is specifically applicable for turbines where the relationship between whirl velocity and flow velocity follows this trigonometric relationship.

Q5: How accurate is this calculation?
A: The calculation provides theoretical values based on ideal conditions. Actual performance may vary due to factors like friction, turbulence, and manufacturing tolerances.