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Stagnation enthalpy Formula

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Stagnation Enthalpy is the total enthalpy of a fluid stream, including both internal energy and flow energy. Check FAQs

h 0 = h + \frac{{U fluid}^{2}}{2}

h₀ - Stagnation Enthalpy?h - Enthalpy?U_fluid - Velocity of Fluid Flow?

Stagnation enthalpy Example

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Here is how the Stagnation enthalpy equation looks like with Values.

Here is how the Stagnation enthalpy equation looks like with Units.

Here is how the Stagnation enthalpy equation looks like.

301.017 = 300 + \frac{{45.1}^{2}}{2}

301.017kJ/kg = 300kJ/kg + \frac{{45.1m/s}^{2}}{2}

301.017 = 300 + \frac{{45.1}^{2}}{2}

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Stagnation enthalpy Solution

Follow our step by step solution on how to calculate Stagnation enthalpy?

FIRST Step Consider the formula

h 0 = h + \frac{{U fluid}^{2}}{2}

Next Step Substitute values of Variables

∴

h 0 = 300kJ/kg + \frac{{45.1m/s}^{2}}{2}

Next Step Convert Units

∴

h 0 = 300000J/kg + \frac{{45.1m/s}^{2}}{2}

Next Step Prepare to Evaluate

∴

h 0 = 300000 + \frac{{45.1}^{2}}{2}

Next Step Evaluate

∴

h 0 = 301017.005J/kg

Next Step Convert to Output's Unit

∴

h 0 = 301.017005kJ/kg

LAST Step Rounding Answer

∴

h 0 = 301.017kJ/kg

Stagnation enthalpy Formula Elements

Variables

Stagnation Enthalpy

Stagnation Enthalpy is the total enthalpy of a fluid stream, including both internal energy and flow energy.

Symbol: h₀

Measurement: Specific EnergyUnit: kJ/kg

Note: Value should be greater than 0.

Formulas to find Stagnation Enthalpy

Enthalpy

Enthalpy is the amount of heat energy per unit mass of a substance.

Symbol: h

Measurement: Specific EnergyUnit: kJ/kg

Note: Value can be positive or negative.

Formulas to find Enthalpy

Velocity of Fluid Flow

Velocity of Fluid Flow is the distance travelled by a fluid per time.

Symbol: U_fluid

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Velocity of Fluid Flow

Other formulas in Thermodynamics and Governing Equations category

Go Heat Capacity Ratio

γ = \frac{C p}{C v}

Go Internal Energy of Perfect Gas at given Temperature

U = C v \cdot T

Go Enthalpy of Ideal Gas at given Temperature

h = C p \cdot T

Go Stagnation Velocity of Sound

a o = \sqrt{γ \cdot [R] \cdot T 0}

How to Evaluate Stagnation enthalpy?

Stagnation enthalpy evaluator uses Stagnation Enthalpy = Enthalpy+(Velocity of Fluid Flow^2)/2 to evaluate the Stagnation Enthalpy, The Stagnation enthalpy formula is defined as the sum of enthalpy of fluid stream and half of the square of fluid velocity. Stagnation Enthalpy is denoted by h₀ symbol.

How to evaluate Stagnation enthalpy using this online evaluator? To use this online evaluator for Stagnation enthalpy, enter Enthalpy (h) & Velocity of Fluid Flow (U_fluid) and hit the calculate button.

FAQs on Stagnation enthalpy

What is the formula to find Stagnation enthalpy?

The formula of Stagnation enthalpy is expressed as Stagnation Enthalpy = Enthalpy+(Velocity of Fluid Flow^2)/2. Here is an example- 0.301012 = 300000+(45.1^2)/2.

How to calculate Stagnation enthalpy?

With Enthalpy (h) & Velocity of Fluid Flow (U_fluid) we can find Stagnation enthalpy using the formula - Stagnation Enthalpy = Enthalpy+(Velocity of Fluid Flow^2)/2.

Can the Stagnation enthalpy be negative?

No, the Stagnation enthalpy, measured in Specific Energy cannot be negative.

Which unit is used to measure Stagnation enthalpy?

Stagnation enthalpy is usually measured using the Kilojoule per Kilogram[kJ/kg] for Specific Energy. Joule per Kilogram[kJ/kg], Joule per Gram[kJ/kg], Joule per Centigram[kJ/kg] are the few other units in which Stagnation enthalpy can be measured.

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