Posted inBasics
High velocity gas flow in pipes with friction
The following discussion deals with the case of a relative high velocity gas flow through…
Posted inBasics
Variation in area for isentropic flow
In many engineering devices used in the natural gas industry, the flow of a gas…
Posted inBasics
Critical flow variables
For compressible flows two regions of different behavior can be recognized depending on the Mach…
Posted inAdvanced Concepts
Dynamical similarity of ideal gas flows
The non-linear nature of Euler’s equation may cause serious mathematical difficulties when solving a problem…
Posted inAdvanced Concepts
Small perturbations at the speed of sound
In a great number of engineering problems one is interested in the perturbation of a…
Posted inAdvanced Concepts
The Vazsonyi-Crocco equation
Now we shall determine the relationships between the kinematic and thermal variables for an ideal…
Posted inBasics
The law of conservation of energy for perfect fluid flow
It was previously shown, that the Bernoulli equation expresses the conservation of mechanical energy for…
Posted inBasics
Kelvin’s vortex theorem
As it is known, circulation around any closed curve in the fluid is defined by…
Posted inBasics
Simple applications of the Bernoulli equation
There is a rather large range of problems in fluid mechanics to which the perfect…