Turbojet Gross Thrust Calculator

Turbojet Gross Thrust Formula:

\[ TG = m_a \times (1+f) \times V_e + (p_e - p_{\infty}) \times A_e \]

Mass Flow Rate Turbojet (m_a):

kg/s

Fuel Air Ratio (f):

Exit Velocity (V_e):

m/s

Nozzle Exit Pressure (p_e):

Ambient Pressure (p_∞):

Nozzle Exit Area (A_e):

m²

Gross Thrust of Turbojet (TG):

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1. What is Turbojet Gross Thrust?

Gross Thrust of Turbojet is the total thrust force produced by a turbojet engine excluding the ram drag. It represents the actual propulsive force generated by the engine.

2. How Does the Calculator Work?

The calculator uses the Turbojet Gross Thrust equation:

\[ TG = m_a \times (1+f) \times V_e + (p_e - p_{\infty}) \times A_e \]

Where:

\( TG \) — Gross Thrust of Turbojet (N)
\( m_a \) — Mass Flow Rate Turbojet (kg/s)
\( f \) — Fuel Air Ratio
\( V_e \) — Exit Velocity (m/s)
\( p_e \) — Nozzle Exit Pressure (Pa)
\( p_{\infty} \) — Ambient Pressure (Pa)
\( A_e \) — Nozzle Exit Area (m²)

Explanation: The equation calculates thrust by considering both the momentum thrust from exhaust gases and the pressure thrust from nozzle pressure differential.

3. Importance of Gross Thrust Calculation

Details: Accurate thrust calculation is crucial for aircraft performance analysis, engine design optimization, and flight safety assessments in aerospace engineering.

4. Using the Calculator

Tips: Enter all values in appropriate units. Mass flow rate and exit velocity must be positive values. Pressure values should be in Pascals, and area in square meters.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between gross thrust and net thrust?
A: Gross thrust is the total thrust produced, while net thrust subtracts ram drag (inlet momentum drag) from gross thrust.

Q2: Why is fuel air ratio included in the calculation?
A: The fuel air ratio accounts for the additional mass flow from fuel injection, which contributes to the exhaust momentum and thus the thrust.

Q3: What are typical values for turbojet thrust?
A: Thrust values vary widely from small engines producing few kilonewtons to large engines producing hundreds of kilonewtons of thrust.

Q4: How does ambient pressure affect thrust?
A: Lower ambient pressure (higher altitude) generally increases the pressure thrust component due to larger pressure differential.

Q5: Is this equation applicable to all jet engines?
A: This specific equation is designed for turbojet engines. Other engine types like turbofans or turboprops have different thrust calculation methods.