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Turbofan thrust Formula

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Turbofan Thrust is the total thrust produced by jet core efflux and bypass air which has been accelerated by a ducted fan. Check FAQs

T = m c \cdot (V j,c - V) + ṁ b \cdot (V j,b - V)

T - Turbofan Thrust?m_c - Mass Flow Rate Core?V_j,c - Exit Velocity Core Nozzle?V - Flight Speed?ṁ_b - Mass Flow Rate Bypass?V_j,b - Exit Velocity Bypass Nozzle?

Turbofan thrust Example

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Here is how the Turbofan thrust equation looks like with Values.

Here is how the Turbofan thrust equation looks like with Units.

Here is how the Turbofan thrust equation looks like.

17.802 = 43 \cdot (300 - 198) + 258 \cdot (250 - 198)

17.802kN = 43kg/s \cdot (300m/s - 198m/s) + 258kg/s \cdot (250m/s - 198m/s)

17.802 = 43 \cdot (300 - 198) + 258 \cdot (250 - 198)

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Turbofan thrust Solution

Follow our step by step solution on how to calculate Turbofan thrust?

FIRST Step Consider the formula

T = m c \cdot (V j,c - V) + ṁ b \cdot (V j,b - V)

Next Step Substitute values of Variables

∴

T = 43kg/s \cdot (300m/s - 198m/s) + 258kg/s \cdot (250m/s - 198m/s)

Next Step Prepare to Evaluate

∴

T = 43 \cdot (300 - 198) + 258 \cdot (250 - 198)

Next Step Evaluate

∴

T = 17802N

LAST Step Convert to Output's Unit

∴

T = 17.802kN

Turbofan thrust Formula Elements

Variables

Turbofan Thrust

Turbofan Thrust is the total thrust produced by jet core efflux and bypass air which has been accelerated by a ducted fan.

Symbol: T

Measurement: ForceUnit: kN

Note: Value should be greater than 0.

Formulas to find Turbofan Thrust

Mass Flow Rate Core

Mass Flow Rate Core refers to the rate at which air flows through the core of a turbofan engine, specifically through the combustion chamber and the turbine.

Symbol: m_c

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Mass Flow Rate Core

Exit Velocity Core Nozzle

Exit Velocity Core Nozzle is the speed at which exhaust gases exit the primary nozzle of a turbofan engine.

Symbol: V_j,c

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Exit Velocity Core Nozzle

Flight Speed

Flight Speed refers to the velocity at which an aircraft travels through the air.

Symbol: V

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Flight Speed

Mass Flow Rate Bypass

Mass Flow Rate Bypass refers to the rate at which air bypasses the core of a turbofan engine and flows through the bypass duct.

Symbol: ṁ_b

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Mass Flow Rate Bypass

Exit Velocity Bypass Nozzle

Exit Velocity Bypass Nozzle is the speed at which exhaust gases exit the secondary nozzle of a turbofan exit.

Symbol: V_j,b

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Exit Velocity Bypass Nozzle

Other formulas in Turbofans category

Go Bypass Ratio

bpr = \frac{ṁ b}{m c}

Go Cooling Effectiveness

ε = \frac{T g - T m}{T g - T c}

Go Total mass flow rate through turbofan engine

m a = m c + ṁ b

Go Core Exhaust Velocity given Turbofan Thrust

V j,c = \frac{T - ṁ b \cdot (V j,b - V)}{m c} + V

How to Evaluate Turbofan thrust?

Turbofan thrust evaluator uses Turbofan Thrust = Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed)+Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed) to evaluate the Turbofan Thrust, Turbofan thrust is a measure of the forward force generated by a turbofan engine, which is influenced by the mass flow rate and velocity of the hot gases expelled out of the nozzle and the bypass flow. It is a critical parameter in aerospace engineering, used to evaluate the performance of a turbofan engine. Turbofan Thrust is denoted by T symbol.

How to evaluate Turbofan thrust using this online evaluator? To use this online evaluator for Turbofan thrust, enter Mass Flow Rate Core (m_c), Exit Velocity Core Nozzle (V_j,c), Flight Speed (V), Mass Flow Rate Bypass (ṁ_b) & Exit Velocity Bypass Nozzle (V_j,b) and hit the calculate button.

FAQs on Turbofan thrust

What is the formula to find Turbofan thrust?

The formula of Turbofan thrust is expressed as Turbofan Thrust = Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed)+Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed). Here is an example- 0.017802 = 43*(300-198)+258*(250-198).

How to calculate Turbofan thrust?

With Mass Flow Rate Core (m_c), Exit Velocity Core Nozzle (V_j,c), Flight Speed (V), Mass Flow Rate Bypass (ṁ_b) & Exit Velocity Bypass Nozzle (V_j,b) we can find Turbofan thrust using the formula - Turbofan Thrust = Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed)+Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed).

Can the Turbofan thrust be negative?

No, the Turbofan thrust, measured in Force cannot be negative.

Which unit is used to measure Turbofan thrust?

Turbofan thrust is usually measured using the Kilonewton[kN] for Force. Newton[kN], Exanewton[kN], Meganewton[kN] are the few other units in which Turbofan thrust can be measured.

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Turbofan thrust Formula

Turbofan thrust Example

Turbofan thrust Solution

Turbofan thrust Formula Elements

Other formulas in Turbofans category

How to Evaluate Turbofan thrust?

FAQs on Turbofan thrust

Variable Name