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When the flow is supersonic flow?
A flow field is defined as supersonic if the Mach number is greater than 1 at every point. Supersonic flows are frequently characterized by the presence of shock waves across which the flow properties and streamlines change discontinuously (in contrast to the smooth, continuous variations in subsonic flows).
How does supersonic flow behave in an isentropic converging duct?
For a supersonic flow in a converging conduit (M >1 and dA <0), the flow is decelerating (dV <0). At a throat where dA =0, either M =1 or dV =0 (the flow could be accelerating through M =1, or it may reach a velocity such that dV =0).
What is meant by isentropic flow?
In fluid dynamics, an isentropic flow is a fluid flow that is both adiabatic and reversible. That is, no heat is added to the flow, and no energy transformations occur due to friction or dissipative effects.
What is sonic flow?
Sonic flow occurs when the velocity of the fluid reaches the speed of sound in that medium. At subsonic velocities the flow is characterized by turbulent mixing, and this is responsible for the noise produced.
Is isentropic reversible?
A reversible, adiabatic process is always isentropic since no entropy generation due to irreversibilities (sgen=0) and no change of entropy due to heat transfer (ds=? Q/T=0).
What is difference between adiabatic and isentropic?
In summary: 1. Adiabatic process is the process wherein there’s absolutely no heat loss and gain in the fluid being worked on whereas isentropic process is still an adiabatic process (there’s no heat energy transfer) and is the reversible type (no entropy change).
Why does flow choke?
If the fluid is a liquid, a different type of limiting condition (also known as choked flow) occurs when the venturi effect acting on the liquid flow through the restriction causes a decrease of the liquid pressure beyond the restriction to below that of the liquid’s vapor pressure at the prevailing liquid temperature.