Stagnation Enthalpy Calculator, Formula, Joules Calculation

Stagnation Enthalpy Calculator:

Enter the values of enthalpy, H_(J) and velocity, V_(m/s) to determine the value of Stagnation enthalpy, H_s(J).

Stagnation Enthalpy Formula:

Stagnation enthalpy is a thermodynamic property that represents the total energy of a fluid stream, including both its internal energy and kinetic energy. It is particularly important in fluid dynamics and thermodynamics, especially in the analysis of compressible flows and turbo machinery.

Stagnation enthalpy is used to determine the total enthalpy of a fluid when it is brought to rest is entropically.

Stagnation enthalpy – total energy per unit mass of the fluid particle.

Enthalpy of the fluid – its internal energy considering pressure, temperature, and composition. Fluid velocity – the speed of the fluid particle at that point.

A fluid particle flows through a point with a certain internal energy (enthalpy, H). The particle also has kinetic energy due to its speed (V). Stagnation enthalpy (Hstag) combines these two energy components, providing a complete picture of the total energy the fluid particle possesses at that specific location.

Stagnation enthalpy, H_s(J) in joules is calculated by dividing the sum of enthalpy, H_(J) in joules and square of velocity, V_(m/s) in metres per second by 2.

Stagnation enthalpy, H_s(J) = H_(J) + V²_(m/s) / 2

H_s(J) = stagnation enthalpy in joules, J.

H_(J) = enthalpy in joules, J.

V_(m/s) = velocity in metres per second, m/s.

Stagnation Enthalpy Calculation:

1. Finding Stagnation Enthalpy:

Given: H_(J) = 5000J, V_(m/s) = 30m/s.

Stagnation enthalpy, H_s(J) = H_(J) + V²_(m/s) / 2

H_s(J) = 5000 + 30² / 2

H_s(J) = 5000 + 450

H_s(J) = 5450J.

2. Finding Fluid Velocity:

Given: H_(J) = 5500J, H_s(J) = 6000J.

Stagnation enthalpy, H_s(J) = H_(J) + V²_(m/s) / 2

V_(m/s) = √( H_s(J) – H_(J) )* 2

V_(m/s) = √6000 – 5500 * 2

V_(m/s) = √500 * 2

V_(m/s) = √1000

V_(m/s) = 31.62m/s.

Stagnation Temperature