What are the assumption made for Rayleigh flow?
1. One dimensional flow without friction and heat transfer 2. Constant area duct 3. Perfect gas with constant specific heats and molecular weights 4.
What is meant by Rayleigh line?
[′rā·lē ‚līn] (mechanics) A straight line connecting points corresponding to the initial and final states on a graph of pressure versus specific volume for a substance subjected to a shock wave.
What is Rayleigh and Fanno flow?
• Duct Flow with Heat Transfer and. Negligible Friction (Rayleigh Flow) – Property Relations for Rayleigh Flow. • Duct flow with friction without heat. transfer (Fanno flow)
What is meant by Fanno flow?
Fanno flow is the adiabatic flow through a constant area duct where the effect of friction is considered. Compressibility effects often come into consideration, although the Fanno flow model certainly also applies to incompressible flow.
Which condition is suitable for Rayleigh line?
Rayleigh Line Flows (41.1), (41.2a), (41.5), (38.8) and (41.6) are valid between any two points “1” and “2”. So, for frictionless flow of an ideal gas in a constant area duct with heat transfer, we have a situation of six equations and seven unknowns.
What is the characteristic aspect of Rayleigh flow What are the main assumptions associated with Rayleigh flow?
What are the main assumptions associated with Rayleigh flow? The steady one dimensional flow of ideal gas with constant specific heats through a constant area duct with heat transfer and negligible friction is the main aspect of Rayleigh flow.
How Fanno flow is different from Rayleigh flow?
Fanno Flow – flow with friction in an adiabatic constant area pipe. 2. Rayleigh Flow – flow with heat transfer in a frictionless constant area pipe. Effect of friction and area change using an adiabatic converging-diverging nozzle.
What is Fanno flow equation?
Flow in a constant area duct with friction and without heat transfers is described by a curve is known as Fanno line or Fanno curve. Weknow that, From continuity equation, Density ρ is a function of entropy and enthalpy.
What is the characteristics aspect of Fanno flow?
The characteristic aspect of Fanno flow is its consideration of friction. The main assumptions associated with Fanno flow are: the flow is steady, one- dimensional, and adiabatic through a constant-area duct, and the fluid is an ideal gas with constant specific heats.
What causes Rayleigh scattering?
Rayleigh scattering results from the electric polarizability of the particles. The oscillating electric field of a light wave acts on the charges within a particle, causing them to move at the same frequency. The particle, therefore, becomes a small radiating dipole whose radiation we see as scattered light.
How Fanno flow is differ from Rayleigh flow?
1. Fanno Flow – flow with friction in an adiabatic constant area pipe. Rayleigh Flow – flow with heat transfer in a frictionless constant area pipe.
Which of the following is true for Rayleigh flow at M 1?
Detailed Solution. Rayleigh Flow: Flow in a constant area duct with heat transfer and without friction is called Rayleigh Flow. From the T-S diagram for the Rayleigh flow, it can be observed that at M = 1 the entropy is maximum.
How does the Rayleigh flow model work?
The Rayleigh flow model begins with a differential equation that relates the change in Mach number with the change in stagnation temperature, T 0. The differential equation is shown below.
What is Rayleigh line in physics?
In thermodynamic coordinates, the Rayleigh flow process can be described by a curve known as Rayleigh line and is defined as the locus of quasi- static thermodynamic state points traced during the flow. The Rayleigh line satisfies the equation of state along with simple forms of continuity and momentum equation.
What is Rayleigh flow or diabetic flow?
The friction less flow of a perfect gas through a constant area duct in which heat transfer to or from the gas is the dominant factor bringing about changes in the flow is referred to as Rayleigh flow or diabetic flow.
What is Rayleigh curve in gas chromatography?
Rayleigh line (or) curve. The friction less flow of a perfect gas through a constant area duct in which heat transfer to or from the gas is the dominant factor bringing about changes in the flow is referred to as Rayleigh flow or diabetic flow.