1. What Is The Venturi Equation?

The Venturi equation describes the relationship between fluid velocity and pressure in a constricted flow. It is based on Bernoulli's principle and continuity equation, providing a method to calculate flow velocity from pressure measurements.

2. How Does The Calculator Work?

The calculator uses the Venturi equation:

Where:

• \( V_1 \) — Velocity at point 1 (m/s)
• \( P_1 \) — Pressure at point 1 (Pa)
• \( P_2 \) — Pressure at point 2 (Pa)
• \( \rho_0 \) — Fluid density (kg/m³)
• \( A_{lift} \) — Contraction ratio (dimensionless)

Explanation: The equation calculates flow velocity based on the pressure difference between two points and the area contraction ratio in a Venturi tube.

3. Importance Of Airspeed Measurement

Details: Accurate airspeed measurement is crucial for various applications including aviation, HVAC systems, fluid dynamics research, and industrial process control.

4. Using The Calculator

Tips: Enter pressure values in Pascals, density in kg/m³, and contraction ratio as a dimensionless value. All values must be positive and valid.

5. Frequently Asked Questions (FAQ)

Q1: What is a Venturi tube?
A: A Venturi tube is a flow measurement device consisting of a constricted section that causes pressure drop, allowing velocity calculation.

Q2: Why does pressure decrease in a constriction?
A: According to Bernoulli's principle, as fluid velocity increases through a constriction, its pressure decreases to conserve energy.

Q3: What are typical contraction ratio values?
A: Contraction ratios typically range from 1.5 to 4.0, depending on the specific Venturi tube design and application.

Q4: Can this equation be used for compressible fluids?
A: This simplified form is primarily for incompressible fluids. Compressible flows require additional correction factors.

Q5: What are common applications of Venturi meters?
A: Venturi meters are used in water supply systems, chemical processing, petroleum industry, and aeronautical engineering for flow measurement.