Bypass Ratio Calculator

↳

⤿

Jet Propulsion

Components of Gas Turbine

Rocket Propulsion

Thermodynamics and Governing Equations

⤿

Turbofans

Performance Parameters

Turbojets

Turbomachinery Equations

Turboprops

✖Mass Flow Rate Bypass refers to the rate at which air bypasses the core of a turbofan engine and flows through the bypass duct.ⓘ Mass Flow Rate Bypass [ṁ_b]			+10% -10%
✖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.ⓘ Mass Flow Rate Core [m_c]			+10% -10%

✖The Bypass Ratio is defined as the mass flow of air passing outside the core divided by the mass flow through the core.ⓘ Bypass Ratio [bpr]

⎘ Copy

👎

Formula

✖

Bypass Ratio

Formula

`"bpr" = "ṁ"_{"b"}/"m"_{"c"}`

Example

`"6"="258kg/s"/"43kg/s"`

Calculator

LaTeX

Reset

👍

Download Aeroengines Formula PDF

Bypass Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core
bpr = ṁ_b/m_c
This formula uses 3 Variables

Variables Used

Bypass Ratio - The Bypass Ratio is defined as the mass flow of air passing outside the core divided by the mass flow through the core.
Mass Flow Rate Bypass - (Measured in Kilogram per Second) - Mass Flow Rate Bypass refers to the rate at which air bypasses the core of a turbofan engine and flows through the bypass duct.
Mass Flow Rate Core - (Measured in Kilogram per Second) - 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.

STEP 1: Convert Input(s) to Base Unit

Mass Flow Rate Bypass: 258 Kilogram per Second --> 258 Kilogram per Second No Conversion Required
Mass Flow Rate Core: 43 Kilogram per Second --> 43 Kilogram per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

bpr = ṁ_b/m_c --> 258/43

Evaluating ... ...

bpr = 6

STEP 3: Convert Result to Output's Unit

6 --> No Conversion Required

FINAL ANSWER

6 <-- Bypass Ratio

(Calculation completed in 00.004 seconds)

You are here -

Home » Physics » Aeroengines » Jet Propulsion » Turbofans » Bypass Ratio

Credits

Created by Shreyash

Rajiv Gandhi Institute of Technology (RGIT), Mumbai

Shreyash has created this Calculator and 10+ more calculators!

Verified by Anshika Arya

National Institute Of Technology (NIT), Hamirpur

Anshika Arya has verified this Calculator and 2500+ more calculators!

< 10+ Turbofans Calculators

Mass flow rate hot primary given turbofan thrust

Go Mass Flow Rate Core = (Turbofan thrust-Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed))/(Exit Velocity Core Nozzle-Flight Speed)

Bypass Mass Flow Rate given Turbofan Thrust

Go Mass Flow Rate Bypass = (Turbofan thrust-Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed))/(Exit Velocity Bypass Nozzle-Flight Speed)

Bypass Exhaust Velocity given Turbofan Thrust

Go Exit Velocity Bypass Nozzle = (Turbofan thrust-Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed))/Mass Flow Rate Bypass+Flight Speed

Core Exhaust Velocity given Turbofan Thrust

Go Exit Velocity Core Nozzle = (Turbofan thrust-Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed))/Mass Flow Rate Core+Flight Speed

Turbofan thrust

Go Turbofan thrust = Mass Flow Rate Core*(Exit Velocity Core Nozzle-Flight Speed)+Mass Flow Rate Bypass*(Exit Velocity Bypass Nozzle-Flight Speed)

Cooling Effectiveness

Go Cooling Effectiveness = (Temperature of Hot Gas Stream-Temperature of Metal)/(Temperature of Hot Gas Stream-Temperature of Cooling Air)

Total mass flow rate through turbofan engine

Go Mass Flow Rate = Mass Flow Rate Core+Mass Flow Rate Bypass

Mass flow rate of cool secondary engine

Go Mass Flow Rate Bypass = Mass Flow Rate-Mass Flow Rate Core

Mass flow rate hot primary engine

Go Mass Flow Rate Core = Mass Flow Rate-Mass Flow Rate Bypass

Bypass Ratio

Go Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core

Bypass Ratio Formula

Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core
bpr = ṁ_b/m_c

Importance of Bypass Ratio

The bypass ratio that is chosen has a significant impact on efficiency since it controls the jet velocity for a specific core. The bypass ratio also has a significant impact on the engine's size, weight, and appearance. Pure turbojets have a tiny diameter compared to their length, whereas high bypass ratio engines have a diameter that is comparable to their length.

How to Calculate Bypass Ratio?

Bypass Ratio calculator uses Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core to calculate the Bypass Ratio, The Bypass Ratio formula is the ratio of the mass flow through the core to the mass flow of air leaving the core of the turbojet engine. Bypass Ratio is denoted by bpr symbol.

How to calculate Bypass Ratio using this online calculator? To use this online calculator for Bypass Ratio, enter Mass Flow Rate Bypass (ṁ_b) & Mass Flow Rate Core (m_c) and hit the calculate button. Here is how the Bypass Ratio calculation can be explained with given input values -> 6 = 258/43.

FAQ

What is Bypass Ratio?

The Bypass Ratio formula is the ratio of the mass flow through the core to the mass flow of air leaving the core of the turbojet engine and is represented as bpr = ṁ_b/m_c or Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core. Mass Flow Rate Bypass refers to the rate at which air bypasses the core of a turbofan engine and flows through the bypass duct & 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.

How to calculate Bypass Ratio?

The Bypass Ratio formula is the ratio of the mass flow through the core to the mass flow of air leaving the core of the turbojet engine is calculated using Bypass Ratio = Mass Flow Rate Bypass/Mass Flow Rate Core. To calculate Bypass Ratio, you need Mass Flow Rate Bypass (ṁ_b) & Mass Flow Rate Core (m_c). With our tool, you need to enter the respective value for Mass Flow Rate Bypass & Mass Flow Rate Core and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search